/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:22:42,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:22:42,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:22:42,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:22:42,693 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-Separate.epf [2021-06-05 15:22:42,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:22:42,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:22:42,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:22:42,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:22:42,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:22:42,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:22:42,715 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:22:42,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:22:42,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:22:42,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:22:42,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:22:42,716 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:22:42,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:22:42,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:22:42,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:22:42,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:22:42,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:22:42,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:22:42,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:22:42,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:22:42,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:22:42,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:22:43,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:22:43,001 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:22:43,002 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:22:43,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2021-06-05 15:22:43,003 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2021-06-05 15:22:43,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:22:43,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:22:43,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:22:43,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:22:43,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:22:43,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:22:43,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:22:43,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:22:43,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:22:43,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... [2021-06-05 15:22:43,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:22:43,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:22:43,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:22:43,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:22:43,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:22:43,137 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:22:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:22:43,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:22:43,138 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:22:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:22:43,138 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:22:43,138 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:22:43,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:22:43,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:22:43,139 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:22:43,140 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:22:43,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:22:43,141 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:22:43,435 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:22:43,435 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:22:43,437 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:22:43 BoogieIcfgContainer [2021-06-05 15:22:43,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:22:43,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:22:43,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:22:43,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:22:43,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:43" (1/2) ... [2021-06-05 15:22:43,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757164e and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:22:43, skipping insertion in model container [2021-06-05 15:22:43,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:22:43" (2/2) ... [2021-06-05 15:22:43,443 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2021-06-05 15:22:43,463 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:22:43,464 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:22:43,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:22:43,465 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:22:43,526 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 15:22:43,544 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 15:22:43,560 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:22:43,561 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:22:43,561 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:22:43,561 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:22:43,561 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:22:43,561 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:22:43,561 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:22:43,561 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:22:43,569 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 15:22:43,597 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:22:43,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:43,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:43,614 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:43,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1822169931, now seen corresponding path program 1 times [2021-06-05 15:22:43,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:43,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138699357] [2021-06-05 15:22:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:43,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:43,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138699357] [2021-06-05 15:22:43,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138699357] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:43,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:22:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:22:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162190495] [2021-06-05 15:22:43,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:22:43,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:22:43,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:43,753 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:43,801 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-06-05 15:22:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:22:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 15:22:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:43,821 INFO L225 Difference]: With dead ends: 401 [2021-06-05 15:22:43,821 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 15:22:43,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 15:22:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-06-05 15:22:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-06-05 15:22:43,910 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-06-05 15:22:43,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:43,911 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-06-05 15:22:43,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,911 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-06-05 15:22:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:22:43,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:43,915 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:43,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:22:43,915 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2093701423, now seen corresponding path program 1 times [2021-06-05 15:22:43,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:43,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003388242] [2021-06-05 15:22:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:43,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:43,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003388242] [2021-06-05 15:22:43,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003388242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:43,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:22:43,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:22:43,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312457483] [2021-06-05 15:22:43,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:22:43,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:22:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:43,949 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:43,962 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-06-05 15:22:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:22:43,962 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:22:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:43,966 INFO L225 Difference]: With dead ends: 458 [2021-06-05 15:22:43,966 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 15:22:43,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 15:22:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-06-05 15:22:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-06-05 15:22:43,987 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-06-05 15:22:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:43,988 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-06-05 15:22:43,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-06-05 15:22:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:22:43,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:43,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:43,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:22:43,991 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash 412173230, now seen corresponding path program 1 times [2021-06-05 15:22:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:43,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366193640] [2021-06-05 15:22:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:44,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:44,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366193640] [2021-06-05 15:22:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366193640] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:44,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:22:44,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:22:44,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100932601] [2021-06-05 15:22:44,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:22:44,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:22:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:44,059 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:44,072 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-06-05 15:22:44,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:22:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:22:44,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:44,080 INFO L225 Difference]: With dead ends: 463 [2021-06-05 15:22:44,080 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 15:22:44,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:44,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 15:22:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-06-05 15:22:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-06-05 15:22:44,103 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-06-05 15:22:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:44,104 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-06-05 15:22:44,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,104 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-06-05 15:22:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:22:44,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:44,106 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:44,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:22:44,107 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1863818432, now seen corresponding path program 2 times [2021-06-05 15:22:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:44,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138120955] [2021-06-05 15:22:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:44,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:44,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138120955] [2021-06-05 15:22:44,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138120955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:44,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342608225] [2021-06-05 15:22:44,385 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:44,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:22:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:22:44,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:44,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:44,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:44,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:22:44,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:22:44,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:44,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:44,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:44,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 15:22:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:44,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342608225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:44,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:44,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 15:22:44,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248379080] [2021-06-05 15:22:44,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:22:44,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:44,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:22:44,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:22:44,952 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:45,974 INFO L93 Difference]: Finished difference Result 1470 states and 4324 transitions. [2021-06-05 15:22:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:22:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:22:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:45,984 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 15:22:45,984 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 15:22:45,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:22:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 15:22:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 637. [2021-06-05 15:22:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2021-06-05 15:22:46,018 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2021-06-05 15:22:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2021-06-05 15:22:46,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2021-06-05 15:22:46,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:22:46,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:46,021 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:46,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:46,245 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:46,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:46,245 INFO L82 PathProgramCache]: Analyzing trace with hash -734842624, now seen corresponding path program 3 times [2021-06-05 15:22:46,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:46,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985378247] [2021-06-05 15:22:46,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985378247] [2021-06-05 15:22:46,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985378247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697433044] [2021-06-05 15:22:46,410 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:46,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:22:46,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:22:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:46,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:22:46,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:46,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:46,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:46,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 15:22:46,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 15:22:46,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:46,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:46,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:46,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 15:22:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697433044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:46,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:22:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021410500] [2021-06-05 15:22:46,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:22:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:46,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:22:46,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:22:46,809 INFO L87 Difference]: Start difference. First operand 637 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:47,668 INFO L93 Difference]: Finished difference Result 1386 states and 3964 transitions. [2021-06-05 15:22:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:22:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:22:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:47,675 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 15:22:47,675 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 15:22:47,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:22:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 15:22:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 755. [2021-06-05 15:22:47,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2021-06-05 15:22:47,700 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2021-06-05 15:22:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:47,701 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2021-06-05 15:22:47,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,701 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2021-06-05 15:22:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:22:47,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:47,704 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:47,925 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash -641687495, now seen corresponding path program 1 times [2021-06-05 15:22:47,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:47,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563288968] [2021-06-05 15:22:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:47,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563288968] [2021-06-05 15:22:47,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563288968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:47,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430533548] [2021-06-05 15:22:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:48,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:22:48,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:48,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:22:48,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:48,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:48,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:48,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:22:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:48,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430533548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:48,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:48,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:22:48,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322669466] [2021-06-05 15:22:48,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:22:48,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:48,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:22:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:22:48,093 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:48,149 INFO L93 Difference]: Finished difference Result 972 states and 2800 transitions. [2021-06-05 15:22:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:22:48,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:22:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:48,154 INFO L225 Difference]: With dead ends: 972 [2021-06-05 15:22:48,154 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 15:22:48,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:22:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 15:22:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 773. [2021-06-05 15:22:48,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.873056994818653) internal successors, (2218), 772 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2218 transitions. [2021-06-05 15:22:48,175 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2218 transitions. Word has length 28 [2021-06-05 15:22:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:48,175 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2218 transitions. [2021-06-05 15:22:48,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2218 transitions. [2021-06-05 15:22:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:22:48,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:48,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:48,400 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1280680323, now seen corresponding path program 4 times [2021-06-05 15:22:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156185730] [2021-06-05 15:22:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:48,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156185730] [2021-06-05 15:22:48,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156185730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325025446] [2021-06-05 15:22:48,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:48,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:22:48,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:22:48,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325025446] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:48,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:22:48,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-06-05 15:22:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961041454] [2021-06-05 15:22:48,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:22:48,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:22:48,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:48,567 INFO L87 Difference]: Start difference. First operand 773 states and 2218 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:48,588 INFO L93 Difference]: Finished difference Result 1430 states and 4086 transitions. [2021-06-05 15:22:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:22:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-06-05 15:22:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:48,595 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 15:22:48,595 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 15:22:48,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 15:22:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1108. [2021-06-05 15:22:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.962962962962963) internal successors, (3280), 1107 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3280 transitions. [2021-06-05 15:22:48,633 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3280 transitions. Word has length 29 [2021-06-05 15:22:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:48,634 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3280 transitions. [2021-06-05 15:22:48,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:48,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3280 transitions. [2021-06-05 15:22:48,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:22:48,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:48,637 INFO L521 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] [2021-06-05 15:22:48,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:48,860 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1936406216, now seen corresponding path program 5 times [2021-06-05 15:22:48,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:48,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593487855] [2021-06-05 15:22:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:48,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593487855] [2021-06-05 15:22:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593487855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790520396] [2021-06-05 15:22:48,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:48,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:22:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:22:48,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790520396] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:49,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:22:49,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 15:22:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609338985] [2021-06-05 15:22:49,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:22:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:22:49,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:22:49,050 INFO L87 Difference]: Start difference. First operand 1108 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:49,080 INFO L93 Difference]: Finished difference Result 3088 states and 9151 transitions. [2021-06-05 15:22:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:22:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:22:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:49,115 INFO L225 Difference]: With dead ends: 3088 [2021-06-05 15:22:49,115 INFO L226 Difference]: Without dead ends: 2925 [2021-06-05 15:22:49,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:22:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-06-05 15:22:49,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2475. [2021-06-05 15:22:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.0731608730800324) internal successors, (7603), 2474 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 7603 transitions. [2021-06-05 15:22:49,181 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 7603 transitions. Word has length 30 [2021-06-05 15:22:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:49,182 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 7603 transitions. [2021-06-05 15:22:49,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 7603 transitions. [2021-06-05 15:22:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:22:49,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:49,187 INFO L521 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] [2021-06-05 15:22:49,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:49,411 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2026861479, now seen corresponding path program 2 times [2021-06-05 15:22:49,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:49,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068057358] [2021-06-05 15:22:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:22:49,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:49,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068057358] [2021-06-05 15:22:49,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068057358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:49,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547370533] [2021-06-05 15:22:49,486 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:49,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:49,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:49,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 15:22:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:49,563 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 7 [2021-06-05 15:22:49,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:49,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:49,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:49,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 15:22:49,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:22:49,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:49,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:49,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:49,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:22:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:22:49,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547370533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:49,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:49,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:22:49,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890579389] [2021-06-05 15:22:49,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:22:49,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:49,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:22:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:22:49,654 INFO L87 Difference]: Start difference. First operand 2475 states and 7603 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:49,861 INFO L93 Difference]: Finished difference Result 3669 states and 11137 transitions. [2021-06-05 15:22:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:22:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:22:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:49,877 INFO L225 Difference]: With dead ends: 3669 [2021-06-05 15:22:49,878 INFO L226 Difference]: Without dead ends: 3669 [2021-06-05 15:22:49,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:22:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2021-06-05 15:22:49,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3342. [2021-06-05 15:22:49,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.0634540556719547) internal successors, (10235), 3341 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 10235 transitions. [2021-06-05 15:22:49,979 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 10235 transitions. Word has length 33 [2021-06-05 15:22:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:49,980 INFO L482 AbstractCegarLoop]: Abstraction has 3342 states and 10235 transitions. [2021-06-05 15:22:49,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 10235 transitions. [2021-06-05 15:22:49,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:22:49,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:49,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:50,205 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -905518150, now seen corresponding path program 3 times [2021-06-05 15:22:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:50,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542037588] [2021-06-05 15:22:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:50,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:50,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:50,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542037588] [2021-06-05 15:22:50,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542037588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:50,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872470547] [2021-06-05 15:22:50,821 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:50,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:22:50,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:50,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:22:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:51,354 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:22:51,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:22:51,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:51,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:51,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:51,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 15:22:51,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:22:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:22:51,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 15:22:51,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:51,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:51,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:51,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 15:22:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872470547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:51,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:51,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 15:22:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990803448] [2021-06-05 15:22:51,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:22:51,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:22:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:22:51,787 INFO L87 Difference]: Start difference. First operand 3342 states and 10235 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:55,415 INFO L93 Difference]: Finished difference Result 6187 states and 18347 transitions. [2021-06-05 15:22:55,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:22:55,416 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:22:55,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:55,442 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 15:22:55,442 INFO L226 Difference]: Without dead ends: 5968 [2021-06-05 15:22:55,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 3149.1ms TimeCoverageRelationStatistics Valid=513, Invalid=5649, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:22:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-06-05 15:22:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4135. [2021-06-05 15:22:55,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 3.0246734397677795) internal successors, (12504), 4134 states have internal predecessors, (12504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 12504 transitions. [2021-06-05 15:22:55,565 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 12504 transitions. Word has length 37 [2021-06-05 15:22:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:55,565 INFO L482 AbstractCegarLoop]: Abstraction has 4135 states and 12504 transitions. [2021-06-05 15:22:55,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 12504 transitions. [2021-06-05 15:22:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:22:55,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:55,575 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:55,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:22:55,798 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:55,799 INFO L82 PathProgramCache]: Analyzing trace with hash 790788090, now seen corresponding path program 4 times [2021-06-05 15:22:55,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:55,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901524214] [2021-06-05 15:22:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:56,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901524214] [2021-06-05 15:22:56,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901524214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398739693] [2021-06-05 15:22:56,221 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 [2021-06-05 15:22:56,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:22:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:56,661 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:22:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:22:56,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:56,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:56,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:56,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:22:56,790 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:22:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:22:56,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:22:56,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:22:56,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:22:56,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:22:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398739693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:57,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:57,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 15:22:57,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418110525] [2021-06-05 15:22:57,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:22:57,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:57,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:22:57,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:22:57,089 INFO L87 Difference]: Start difference. First operand 4135 states and 12504 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:59,621 INFO L93 Difference]: Finished difference Result 4979 states and 14733 transitions. [2021-06-05 15:22:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:22:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:22:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:59,632 INFO L225 Difference]: With dead ends: 4979 [2021-06-05 15:22:59,632 INFO L226 Difference]: Without dead ends: 4828 [2021-06-05 15:22:59,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=206, Invalid=2986, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:22:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-06-05 15:22:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4306. [2021-06-05 15:22:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 4305 states have (on average 3.0011614401858306) internal successors, (12920), 4305 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 12920 transitions. [2021-06-05 15:22:59,737 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 12920 transitions. Word has length 37 [2021-06-05 15:22:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:59,737 INFO L482 AbstractCegarLoop]: Abstraction has 4306 states and 12920 transitions. [2021-06-05 15:22:59,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 12920 transitions. [2021-06-05 15:22:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:22:59,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:59,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:59,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 15:22:59,970 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash 608631128, now seen corresponding path program 5 times [2021-06-05 15:22:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:59,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686800508] [2021-06-05 15:22:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:00,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686800508] [2021-06-05 15:23:00,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686800508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:00,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247944177] [2021-06-05 15:23:00,426 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 [2021-06-05 15:23:00,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:23:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:23:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:00,906 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:00,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:23:00,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:00,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:00,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:00,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:23:01,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:01,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:01,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:01,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:01,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:01,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247944177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:01,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226971177] [2021-06-05 15:23:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:01,287 INFO L87 Difference]: Start difference. First operand 4306 states and 12920 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:04,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:04,556 INFO L93 Difference]: Finished difference Result 7343 states and 21553 transitions. [2021-06-05 15:23:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:23:04,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:04,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:04,573 INFO L225 Difference]: With dead ends: 7343 [2021-06-05 15:23:04,574 INFO L226 Difference]: Without dead ends: 7124 [2021-06-05 15:23:04,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2752.2ms TimeCoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:23:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7124 states. [2021-06-05 15:23:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7124 to 4369. [2021-06-05 15:23:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 3.001144688644689) internal successors, (13109), 4368 states have internal predecessors, (13109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 13109 transitions. [2021-06-05 15:23:04,686 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 13109 transitions. Word has length 37 [2021-06-05 15:23:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:04,686 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 13109 transitions. [2021-06-05 15:23:04,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 13109 transitions. [2021-06-05 15:23:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:04,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:04,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:04,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:04,909 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:04,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1990029928, now seen corresponding path program 6 times [2021-06-05 15:23:04,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:04,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132431420] [2021-06-05 15:23:04,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:05,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:05,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132431420] [2021-06-05 15:23:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132431420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:05,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847559134] [2021-06-05 15:23:05,268 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:05,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:23:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:05,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:23:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:05,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:05,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:23:05,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:05,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:05,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:05,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:23:05,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:05,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:05,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:05,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:05,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:05,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:05,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847559134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:05,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:05,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 15:23:05,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827510787] [2021-06-05 15:23:05,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:23:05,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:23:05,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:23:05,905 INFO L87 Difference]: Start difference. First operand 4369 states and 13109 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:06,861 INFO L93 Difference]: Finished difference Result 4696 states and 13935 transitions. [2021-06-05 15:23:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:23:06,862 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:06,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:06,873 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 15:23:06,873 INFO L226 Difference]: Without dead ends: 4639 [2021-06-05 15:23:06,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:23:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-06-05 15:23:06,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4432. [2021-06-05 15:23:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 2.993680884676145) internal successors, (13265), 4431 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 13265 transitions. [2021-06-05 15:23:06,992 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 13265 transitions. Word has length 37 [2021-06-05 15:23:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:06,992 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 13265 transitions. [2021-06-05 15:23:06,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 13265 transitions. [2021-06-05 15:23:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:07,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:07,002 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:07,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:23:07,224 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:07,225 INFO L82 PathProgramCache]: Analyzing trace with hash 179870100, now seen corresponding path program 7 times [2021-06-05 15:23:07,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:07,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849538315] [2021-06-05 15:23:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:07,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849538315] [2021-06-05 15:23:07,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849538315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:07,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298945164] [2021-06-05 15:23:07,658 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:07,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:07,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:07,955 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:07,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:23:07,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:07,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:07,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:07,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:23:08,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:08,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:08,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:08,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:08,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298945164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:08,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:08,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:23:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008752966] [2021-06-05 15:23:08,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:23:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:23:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:23:08,381 INFO L87 Difference]: Start difference. First operand 4432 states and 13265 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:11,764 INFO L93 Difference]: Finished difference Result 8013 states and 23476 transitions. [2021-06-05 15:23:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:23:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:11,779 INFO L225 Difference]: With dead ends: 8013 [2021-06-05 15:23:11,780 INFO L226 Difference]: Without dead ends: 7794 [2021-06-05 15:23:11,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2977.3ms TimeCoverageRelationStatistics Valid=659, Invalid=7173, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:23:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7794 states. [2021-06-05 15:23:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7794 to 4516. [2021-06-05 15:23:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.9937984496124033) internal successors, (13517), 4515 states have internal predecessors, (13517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 13517 transitions. [2021-06-05 15:23:11,920 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 13517 transitions. Word has length 37 [2021-06-05 15:23:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:11,920 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 13517 transitions. [2021-06-05 15:23:11,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 13517 transitions. [2021-06-05 15:23:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:11,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:11,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:12,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:23:12,152 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:12,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1876176340, now seen corresponding path program 8 times [2021-06-05 15:23:12,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:12,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417628851] [2021-06-05 15:23:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:12,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417628851] [2021-06-05 15:23:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417628851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785225205] [2021-06-05 15:23:12,541 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:12,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:12,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:12,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:23:12,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:12,862 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:12,862 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 27 treesize of output 15 [2021-06-05 15:23:12,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:12,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:12,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:12,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:23:13,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:13,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:13,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:13,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:13,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:13,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:13,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785225205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:13,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:13,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030427458] [2021-06-05 15:23:13,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:13,298 INFO L87 Difference]: Start difference. First operand 4516 states and 13517 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:15,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:15,841 INFO L93 Difference]: Finished difference Result 5240 states and 15444 transitions. [2021-06-05 15:23:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:23:15,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:15,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:15,847 INFO L225 Difference]: With dead ends: 5240 [2021-06-05 15:23:15,847 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 15:23:15,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1969.8ms TimeCoverageRelationStatistics Valid=233, Invalid=3307, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:23:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 15:23:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4471. [2021-06-05 15:23:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4470 states have (on average 2.9997762863534674) internal successors, (13409), 4470 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:15,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 13409 transitions. [2021-06-05 15:23:15,940 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 13409 transitions. Word has length 37 [2021-06-05 15:23:15,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:15,940 INFO L482 AbstractCegarLoop]: Abstraction has 4471 states and 13409 transitions. [2021-06-05 15:23:15,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 13409 transitions. [2021-06-05 15:23:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:15,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:15,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:16,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:16,164 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1564493906, now seen corresponding path program 9 times [2021-06-05 15:23:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914404036] [2021-06-05 15:23:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:16,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914404036] [2021-06-05 15:23:16,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914404036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138509202] [2021-06-05 15:23:16,639 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:16,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:23:16,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:16,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:16,926 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 31 treesize of output 19 [2021-06-05 15:23:16,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:16,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:16,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:16,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:23:17,167 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:17,168 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 43 treesize of output 23 [2021-06-05 15:23:17,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:17,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:17,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:17,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:23:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:17,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138509202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:17,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:17,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:23:17,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561154615] [2021-06-05 15:23:17,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:23:17,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:17,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:23:17,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:23:17,373 INFO L87 Difference]: Start difference. First operand 4471 states and 13409 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:20,943 INFO L93 Difference]: Finished difference Result 8212 states and 24080 transitions. [2021-06-05 15:23:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:23:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:20,953 INFO L225 Difference]: With dead ends: 8212 [2021-06-05 15:23:20,953 INFO L226 Difference]: Without dead ends: 7993 [2021-06-05 15:23:20,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 3053.0ms TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:23:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7993 states. [2021-06-05 15:23:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7993 to 4450. [2021-06-05 15:23:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 2.9997752303888516) internal successors, (13346), 4449 states have internal predecessors, (13346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:21,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 13346 transitions. [2021-06-05 15:23:21,052 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 13346 transitions. Word has length 37 [2021-06-05 15:23:21,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:21,052 INFO L482 AbstractCegarLoop]: Abstraction has 4450 states and 13346 transitions. [2021-06-05 15:23:21,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:21,052 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 13346 transitions. [2021-06-05 15:23:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:21,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:21,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:21,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:23:21,283 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:21,283 INFO L82 PathProgramCache]: Analyzing trace with hash 131812334, now seen corresponding path program 10 times [2021-06-05 15:23:21,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:21,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699192122] [2021-06-05 15:23:21,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:21,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:21,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699192122] [2021-06-05 15:23:21,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699192122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:21,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862807839] [2021-06-05 15:23:21,647 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:21,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:21,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:21,958 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:21,958 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 [2021-06-05 15:23:21,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:21,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:21,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:21,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:23:22,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:22,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:22,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:22,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:22,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:22,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:22,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862807839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:22,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:22,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865432621] [2021-06-05 15:23:22,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:22,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:22,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:22,522 INFO L87 Difference]: Start difference. First operand 4450 states and 13346 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:25,254 INFO L93 Difference]: Finished difference Result 5299 states and 15633 transitions. [2021-06-05 15:23:25,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:23:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:25,261 INFO L225 Difference]: With dead ends: 5299 [2021-06-05 15:23:25,261 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 15:23:25,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1952.0ms TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:23:25,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 15:23:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 4460. [2021-06-05 15:23:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.999551468939224) internal successors, (13375), 4459 states have internal predecessors, (13375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 13375 transitions. [2021-06-05 15:23:25,335 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 13375 transitions. Word has length 37 [2021-06-05 15:23:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:25,335 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 13375 transitions. [2021-06-05 15:23:25,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 13375 transitions. [2021-06-05 15:23:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:25,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:25,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:25,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:25,557 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:25,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:25,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2048900822, now seen corresponding path program 11 times [2021-06-05 15:23:25,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:25,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703591335] [2021-06-05 15:23:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:25,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:25,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703591335] [2021-06-05 15:23:25,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703591335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:25,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926560510] [2021-06-05 15:23:25,948 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:25,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:23:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:26,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:26,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:23:26,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:26,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:26,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:26,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:23:26,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:26,436 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 32 treesize of output 20 [2021-06-05 15:23:26,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:26,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:26,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:26,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 15:23:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:26,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926560510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:26,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:26,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:23:26,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939576081] [2021-06-05 15:23:26,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:23:26,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:26,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:23:26,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:23:26,620 INFO L87 Difference]: Start difference. First operand 4460 states and 13375 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:28,546 INFO L93 Difference]: Finished difference Result 5490 states and 16212 transitions. [2021-06-05 15:23:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:23:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:28,552 INFO L225 Difference]: With dead ends: 5490 [2021-06-05 15:23:28,552 INFO L226 Difference]: Without dead ends: 5339 [2021-06-05 15:23:28,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:23:28,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-06-05 15:23:28,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4543. [2021-06-05 15:23:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4542 states have (on average 2.997578159401145) internal successors, (13615), 4542 states have internal predecessors, (13615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 13615 transitions. [2021-06-05 15:23:28,626 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 13615 transitions. Word has length 37 [2021-06-05 15:23:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:28,626 INFO L482 AbstractCegarLoop]: Abstraction has 4543 states and 13615 transitions. [2021-06-05 15:23:28,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 13615 transitions. [2021-06-05 15:23:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:28,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:28,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:28,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:23:28,858 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:28,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1695292094, now seen corresponding path program 12 times [2021-06-05 15:23:28,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:28,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992627259] [2021-06-05 15:23:28,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:29,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992627259] [2021-06-05 15:23:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992627259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133147096] [2021-06-05 15:23:29,250 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:29,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:23:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:29,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:23:29,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:29,523 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:29,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:23:29,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:29,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:29,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:29,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:23:29,722 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:29,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:29,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:29,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:29,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133147096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:29,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:29,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 15:23:29,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201783968] [2021-06-05 15:23:29,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:29,843 INFO L87 Difference]: Start difference. First operand 4543 states and 13615 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:33,043 INFO L93 Difference]: Finished difference Result 7604 states and 22243 transitions. [2021-06-05 15:23:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:23:33,044 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:33,052 INFO L225 Difference]: With dead ends: 7604 [2021-06-05 15:23:33,053 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 15:23:33,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2417.0ms TimeCoverageRelationStatistics Valid=521, Invalid=6285, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:23:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 15:23:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 4507. [2021-06-05 15:23:33,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 2.9986684420772303) internal successors, (13512), 4506 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 13512 transitions. [2021-06-05 15:23:33,120 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 13512 transitions. Word has length 37 [2021-06-05 15:23:33,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:33,120 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 13512 transitions. [2021-06-05 15:23:33,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:33,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 13512 transitions. [2021-06-05 15:23:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:33,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:33,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:33,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:33,349 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:33,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:33,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1533286864, now seen corresponding path program 13 times [2021-06-05 15:23:33,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:33,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943019796] [2021-06-05 15:23:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:33,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:33,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:33,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943019796] [2021-06-05 15:23:33,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943019796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:33,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241873893] [2021-06-05 15:23:33,707 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:33,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:33,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:34,007 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:34,007 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 [2021-06-05 15:23:34,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:34,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:34,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:34,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:23:34,279 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:34,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:34,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:34,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:34,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:34,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:34,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241873893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:34,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:34,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:23:34,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381520491] [2021-06-05 15:23:34,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:23:34,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:23:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:23:34,505 INFO L87 Difference]: Start difference. First operand 4507 states and 13512 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:37,415 INFO L93 Difference]: Finished difference Result 7935 states and 23388 transitions. [2021-06-05 15:23:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:23:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:37,426 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 15:23:37,426 INFO L226 Difference]: Without dead ends: 7692 [2021-06-05 15:23:37,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2408.3ms TimeCoverageRelationStatistics Valid=464, Invalid=5698, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:23:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7692 states. [2021-06-05 15:23:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7692 to 4612. [2021-06-05 15:23:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9980481457384514) internal successors, (13824), 4611 states have internal predecessors, (13824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:37,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13824 transitions. [2021-06-05 15:23:37,498 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13824 transitions. Word has length 37 [2021-06-05 15:23:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:37,498 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13824 transitions. [2021-06-05 15:23:37,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13824 transitions. [2021-06-05 15:23:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:37,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:37,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:37,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:23:37,705 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:37,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1065374192, now seen corresponding path program 14 times [2021-06-05 15:23:37,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:37,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95154780] [2021-06-05 15:23:37,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:38,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:38,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95154780] [2021-06-05 15:23:38,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95154780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:38,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787799359] [2021-06-05 15:23:38,050 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:38,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:38,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:23:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:38,325 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:38,325 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 27 treesize of output 15 [2021-06-05 15:23:38,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:38,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:38,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:38,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:23:38,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:38,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:38,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:38,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:38,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:38,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:38,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787799359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:38,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:38,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:38,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746703100] [2021-06-05 15:23:38,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:38,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:38,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:38,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:38,819 INFO L87 Difference]: Start difference. First operand 4612 states and 13824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:41,457 INFO L93 Difference]: Finished difference Result 5436 states and 16069 transitions. [2021-06-05 15:23:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:23:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:41,463 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 15:23:41,463 INFO L226 Difference]: Without dead ends: 5299 [2021-06-05 15:23:41,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1758.4ms TimeCoverageRelationStatistics Valid=217, Invalid=3205, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:23:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-06-05 15:23:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4635. [2021-06-05 15:23:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 2.9974104445403538) internal successors, (13890), 4634 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 13890 transitions. [2021-06-05 15:23:41,518 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 13890 transitions. Word has length 37 [2021-06-05 15:23:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:41,518 INFO L482 AbstractCegarLoop]: Abstraction has 4635 states and 13890 transitions. [2021-06-05 15:23:41,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 13890 transitions. [2021-06-05 15:23:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:41,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:41,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:41,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:23:41,733 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:41,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:41,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1048879948, now seen corresponding path program 15 times [2021-06-05 15:23:41,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:41,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740266725] [2021-06-05 15:23:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:42,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:42,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740266725] [2021-06-05 15:23:42,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740266725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:42,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827287334] [2021-06-05 15:23:42,053 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:23:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:42,318 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:42,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:23:42,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:42,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:42,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:42,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:23:42,587 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:42,587 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 34 treesize of output 18 [2021-06-05 15:23:42,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:42,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:42,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:42,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:23:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:42,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827287334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:42,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:42,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:42,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838097602] [2021-06-05 15:23:42,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:42,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:42,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:42,839 INFO L87 Difference]: Start difference. First operand 4635 states and 13890 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:45,609 INFO L93 Difference]: Finished difference Result 5534 states and 16364 transitions. [2021-06-05 15:23:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:23:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:45,616 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 15:23:45,616 INFO L226 Difference]: Without dead ends: 5390 [2021-06-05 15:23:45,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1870.9ms TimeCoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:23:45,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-06-05 15:23:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 4632. [2021-06-05 15:23:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.997624703087886) internal successors, (13882), 4631 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13882 transitions. [2021-06-05 15:23:45,675 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13882 transitions. Word has length 37 [2021-06-05 15:23:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:45,675 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13882 transitions. [2021-06-05 15:23:45,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13882 transitions. [2021-06-05 15:23:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:45,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:45,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:45,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:45,881 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash -157991202, now seen corresponding path program 16 times [2021-06-05 15:23:45,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:45,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545800990] [2021-06-05 15:23:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:46,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545800990] [2021-06-05 15:23:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545800990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009636747] [2021-06-05 15:23:46,267 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:46,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:46,573 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:46,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:23:46,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:46,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:46,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:46,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:23:46,872 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:46,872 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 30 treesize of output 18 [2021-06-05 15:23:46,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:46,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:46,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:46,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:23:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:47,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009636747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:47,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:47,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:23:47,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380915840] [2021-06-05 15:23:47,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:23:47,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:47,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:23:47,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:23:47,093 INFO L87 Difference]: Start difference. First operand 4632 states and 13882 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:49,564 INFO L93 Difference]: Finished difference Result 5614 states and 16607 transitions. [2021-06-05 15:23:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:23:49,565 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:49,571 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 15:23:49,571 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 15:23:49,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1761.7ms TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:23:49,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 15:23:49,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4636. [2021-06-05 15:23:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.9978425026968716) internal successors, (13895), 4635 states have internal predecessors, (13895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13895 transitions. [2021-06-05 15:23:49,647 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13895 transitions. Word has length 37 [2021-06-05 15:23:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:49,647 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13895 transitions. [2021-06-05 15:23:49,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13895 transitions. [2021-06-05 15:23:49,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:49,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:49,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:49,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:23:49,857 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:49,857 INFO L82 PathProgramCache]: Analyzing trace with hash -934377174, now seen corresponding path program 17 times [2021-06-05 15:23:49,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:49,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985906898] [2021-06-05 15:23:49,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:50,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:50,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985906898] [2021-06-05 15:23:50,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985906898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:50,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191556616] [2021-06-05 15:23:50,199 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:50,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:23:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:23:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:50,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:50,495 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 27 treesize of output 15 [2021-06-05 15:23:50,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:50,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:50,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:50,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:23:50,723 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:50,723 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 36 treesize of output 20 [2021-06-05 15:23:50,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:50,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:50,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:50,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 15:23:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:50,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191556616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:50,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:50,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 15:23:50,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107791872] [2021-06-05 15:23:50,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:23:50,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:50,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:23:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:23:50,879 INFO L87 Difference]: Start difference. First operand 4636 states and 13895 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:51,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:51,931 INFO L93 Difference]: Finished difference Result 5069 states and 14964 transitions. [2021-06-05 15:23:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:23:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:51,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:51,938 INFO L225 Difference]: With dead ends: 5069 [2021-06-05 15:23:51,938 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 15:23:51,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1220.9ms TimeCoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:23:51,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 15:23:51,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4642. [2021-06-05 15:23:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.9967679379444085) internal successors, (13908), 4641 states have internal predecessors, (13908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13908 transitions. [2021-06-05 15:23:52,010 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13908 transitions. Word has length 37 [2021-06-05 15:23:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:52,011 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13908 transitions. [2021-06-05 15:23:52,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13908 transitions. [2021-06-05 15:23:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:52,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:52,018 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:52,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:23:52,231 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:52,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325344, now seen corresponding path program 18 times [2021-06-05 15:23:52,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:52,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338610813] [2021-06-05 15:23:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:52,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:52,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338610813] [2021-06-05 15:23:52,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338610813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:52,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006495858] [2021-06-05 15:23:52,640 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:52,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:23:52,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:52,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:52,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:53,093 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:53,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:23:53,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:53,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:53,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:53,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:23:53,201 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:53,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:53,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:53,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:53,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:53,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006495858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:53,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:53,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 15:23:53,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96939130] [2021-06-05 15:23:53,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:23:53,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:23:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:23:53,321 INFO L87 Difference]: Start difference. First operand 4642 states and 13908 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:56,783 INFO L93 Difference]: Finished difference Result 8061 states and 23468 transitions. [2021-06-05 15:23:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:23:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:23:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:56,793 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 15:23:56,793 INFO L226 Difference]: Without dead ends: 7907 [2021-06-05 15:23:56,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2556.1ms TimeCoverageRelationStatistics Valid=542, Invalid=5158, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:23:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2021-06-05 15:23:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 4891. [2021-06-05 15:23:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4890 states have (on average 2.9883435582822084) internal successors, (14613), 4890 states have internal predecessors, (14613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 14613 transitions. [2021-06-05 15:23:56,859 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 14613 transitions. Word has length 37 [2021-06-05 15:23:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:56,860 INFO L482 AbstractCegarLoop]: Abstraction has 4891 states and 14613 transitions. [2021-06-05 15:23:56,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 14613 transitions. [2021-06-05 15:23:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:23:56,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:56,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:57,065 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 587564316, now seen corresponding path program 19 times [2021-06-05 15:23:57,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:57,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425536931] [2021-06-05 15:23:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:57,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425536931] [2021-06-05 15:23:57,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425536931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:57,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580291457] [2021-06-05 15:23:57,473 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:57,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:57,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:57,778 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:23:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:23:57,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:57,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:57,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:57,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:23:57,993 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:23:57,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:23:57,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:23:58,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:23:58,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:23:58,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:23:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:58,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580291457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:58,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:58,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:23:58,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247043843] [2021-06-05 15:23:58,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:23:58,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:23:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:23:58,205 INFO L87 Difference]: Start difference. First operand 4891 states and 14613 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:01,741 INFO L93 Difference]: Finished difference Result 8551 states and 24980 transitions. [2021-06-05 15:24:01,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:24:01,741 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:01,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:01,751 INFO L225 Difference]: With dead ends: 8551 [2021-06-05 15:24:01,751 INFO L226 Difference]: Without dead ends: 8332 [2021-06-05 15:24:01,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 3000.5ms TimeCoverageRelationStatistics Valid=706, Invalid=7484, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:24:01,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2021-06-05 15:24:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 5056. [2021-06-05 15:24:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.9887240356083087) internal successors, (15108), 5055 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 15108 transitions. [2021-06-05 15:24:01,824 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 15108 transitions. Word has length 37 [2021-06-05 15:24:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:01,824 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 15108 transitions. [2021-06-05 15:24:01,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 15108 transitions. [2021-06-05 15:24:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:01,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:01,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:02,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:24:02,053 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2011096740, now seen corresponding path program 20 times [2021-06-05 15:24:02,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:02,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560230983] [2021-06-05 15:24:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:02,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:02,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560230983] [2021-06-05 15:24:02,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560230983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:02,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811101672] [2021-06-05 15:24:02,449 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:02,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:02,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:02,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:02,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:02,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:24:02,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:02,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:02,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:02,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:24:02,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:02,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:02,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:02,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:02,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:02,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811101672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:03,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:03,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:24:03,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673124] [2021-06-05 15:24:03,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:03,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:03,224 INFO L87 Difference]: Start difference. First operand 5056 states and 15108 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:05,882 INFO L93 Difference]: Finished difference Result 5720 states and 16885 transitions. [2021-06-05 15:24:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:24:05,883 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:05,889 INFO L225 Difference]: With dead ends: 5720 [2021-06-05 15:24:05,889 INFO L226 Difference]: Without dead ends: 5568 [2021-06-05 15:24:05,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1864.0ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:24:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-06-05 15:24:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5011. [2021-06-05 15:24:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 2.9940119760479043) internal successors, (15000), 5010 states have internal predecessors, (15000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:05,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 15000 transitions. [2021-06-05 15:24:05,946 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 15000 transitions. Word has length 37 [2021-06-05 15:24:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:05,946 INFO L482 AbstractCegarLoop]: Abstraction has 5011 states and 15000 transitions. [2021-06-05 15:24:05,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 15000 transitions. [2021-06-05 15:24:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:05,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:05,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:06,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:06,153 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:06,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1156799690, now seen corresponding path program 21 times [2021-06-05 15:24:06,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:06,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915347477] [2021-06-05 15:24:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:06,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915347477] [2021-06-05 15:24:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915347477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002927355] [2021-06-05 15:24:06,575 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:06,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:24:06,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:06,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:06,850 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:06,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:24:06,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:06,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:06,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:06,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:24:07,067 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:07,067 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 43 treesize of output 23 [2021-06-05 15:24:07,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:07,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:07,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:07,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:24:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:07,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002927355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:07,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:07,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:24:07,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16615849] [2021-06-05 15:24:07,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:24:07,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:24:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:24:07,267 INFO L87 Difference]: Start difference. First operand 5011 states and 15000 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:11,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:11,193 INFO L93 Difference]: Finished difference Result 8693 states and 25428 transitions. [2021-06-05 15:24:11,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:24:11,194 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:11,203 INFO L225 Difference]: With dead ends: 8693 [2021-06-05 15:24:11,203 INFO L226 Difference]: Without dead ends: 8474 [2021-06-05 15:24:11,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 3142.2ms TimeCoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:24:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-06-05 15:24:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 4990. [2021-06-05 15:24:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4989 states have (on average 2.993986770895971) internal successors, (14937), 4989 states have internal predecessors, (14937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 14937 transitions. [2021-06-05 15:24:11,270 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 14937 transitions. Word has length 37 [2021-06-05 15:24:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:11,270 INFO L482 AbstractCegarLoop]: Abstraction has 4990 states and 14937 transitions. [2021-06-05 15:24:11,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 14937 transitions. [2021-06-05 15:24:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:11,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:11,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:11,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:24:11,481 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:11,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:11,481 INFO L82 PathProgramCache]: Analyzing trace with hash 539506550, now seen corresponding path program 22 times [2021-06-05 15:24:11,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:11,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319838250] [2021-06-05 15:24:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:11,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319838250] [2021-06-05 15:24:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319838250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:11,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539184398] [2021-06-05 15:24:11,819 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:11,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:24:11,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:11,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:12,081 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:24:12,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:24:12,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:12,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:12,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:12,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:24:12,300 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:12,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:12,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:12,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:12,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:12,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:12,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539184398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:12,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:12,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:24:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941037974] [2021-06-05 15:24:12,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:12,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:12,563 INFO L87 Difference]: Start difference. First operand 4990 states and 14937 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:15,309 INFO L93 Difference]: Finished difference Result 5779 states and 17074 transitions. [2021-06-05 15:24:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:24:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:15,317 INFO L225 Difference]: With dead ends: 5779 [2021-06-05 15:24:15,317 INFO L226 Difference]: Without dead ends: 5642 [2021-06-05 15:24:15,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1824.9ms TimeCoverageRelationStatistics Valid=206, Invalid=3100, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:24:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-06-05 15:24:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5000. [2021-06-05 15:24:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 2.99379875975195) internal successors, (14966), 4999 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 14966 transitions. [2021-06-05 15:24:15,382 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 14966 transitions. Word has length 37 [2021-06-05 15:24:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:15,382 INFO L482 AbstractCegarLoop]: Abstraction has 5000 states and 14966 transitions. [2021-06-05 15:24:15,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 14966 transitions. [2021-06-05 15:24:15,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:15,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:15,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:15,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:15,597 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1641206606, now seen corresponding path program 23 times [2021-06-05 15:24:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:15,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568574443] [2021-06-05 15:24:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:15,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:16,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:16,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568574443] [2021-06-05 15:24:16,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568574443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:16,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845984854] [2021-06-05 15:24:16,010 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:16,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:24:16,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:16,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:16,299 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 27 treesize of output 15 [2021-06-05 15:24:16,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:16,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:16,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:16,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:24:16,452 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:16,453 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 27 treesize of output 15 [2021-06-05 15:24:16,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:16,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:16,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:16,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 15:24:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845984854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:16,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:16,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:24:16,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627075451] [2021-06-05 15:24:16,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:24:16,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:24:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:24:16,613 INFO L87 Difference]: Start difference. First operand 5000 states and 14966 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:18,584 INFO L93 Difference]: Finished difference Result 5952 states and 17565 transitions. [2021-06-05 15:24:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:24:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:18,592 INFO L225 Difference]: With dead ends: 5952 [2021-06-05 15:24:18,592 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 15:24:18,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1443.7ms TimeCoverageRelationStatistics Valid=183, Invalid=2469, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:24:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 15:24:18,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5013. [2021-06-05 15:24:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.99341580207502) internal successors, (15003), 5012 states have internal predecessors, (15003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 15003 transitions. [2021-06-05 15:24:18,655 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 15003 transitions. Word has length 37 [2021-06-05 15:24:18,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:18,655 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 15003 transitions. [2021-06-05 15:24:18,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 15003 transitions. [2021-06-05 15:24:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:18,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:18,662 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:18,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 15:24:18,874 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:18,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2102986310, now seen corresponding path program 24 times [2021-06-05 15:24:18,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:18,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399978203] [2021-06-05 15:24:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:19,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:19,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399978203] [2021-06-05 15:24:19,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399978203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:19,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491976925] [2021-06-05 15:24:19,418 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:19,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:24:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:19,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:19,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:19,775 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 27 treesize of output 15 [2021-06-05 15:24:19,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:19,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:19,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:19,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:24:19,986 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:19,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:19,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:19,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:19,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:19,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:20,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491976925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:20,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:20,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 15:24:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236178184] [2021-06-05 15:24:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:20,112 INFO L87 Difference]: Start difference. First operand 5013 states and 15003 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:23,320 INFO L93 Difference]: Finished difference Result 7849 states and 22977 transitions. [2021-06-05 15:24:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:24:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:23,331 INFO L225 Difference]: With dead ends: 7849 [2021-06-05 15:24:23,331 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 15:24:23,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2752.9ms TimeCoverageRelationStatistics Valid=524, Invalid=6282, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:24:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 15:24:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 4949. [2021-06-05 15:24:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.994341147938561) internal successors, (14816), 4948 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14816 transitions. [2021-06-05 15:24:23,412 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14816 transitions. Word has length 37 [2021-06-05 15:24:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:23,412 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14816 transitions. [2021-06-05 15:24:23,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14816 transitions. [2021-06-05 15:24:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:23,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:23,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:23,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:23,640 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:23,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1940981080, now seen corresponding path program 25 times [2021-06-05 15:24:23,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:23,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847151327] [2021-06-05 15:24:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:24,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847151327] [2021-06-05 15:24:24,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847151327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285896312] [2021-06-05 15:24:24,037 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:24,309 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:24:24,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:24:24,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:24,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:24,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:24,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:24:24,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:24,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:24,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:24,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:24,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:24,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285896312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:24,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:24,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:24:24,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934644877] [2021-06-05 15:24:24,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:24:24,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:24:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:24:24,739 INFO L87 Difference]: Start difference. First operand 4949 states and 14816 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:27,722 INFO L93 Difference]: Finished difference Result 8528 states and 25143 transitions. [2021-06-05 15:24:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:24:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:27,734 INFO L225 Difference]: With dead ends: 8528 [2021-06-05 15:24:27,734 INFO L226 Difference]: Without dead ends: 8285 [2021-06-05 15:24:27,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2500.7ms TimeCoverageRelationStatistics Valid=476, Invalid=5844, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:24:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2021-06-05 15:24:27,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 4893. [2021-06-05 15:24:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 2.994276369582993) internal successors, (14648), 4892 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 14648 transitions. [2021-06-05 15:24:27,831 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 14648 transitions. Word has length 37 [2021-06-05 15:24:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:27,831 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 14648 transitions. [2021-06-05 15:24:27,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 14648 transitions. [2021-06-05 15:24:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:27,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:27,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:28,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:24:28,037 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:28,038 INFO L82 PathProgramCache]: Analyzing trace with hash -657679976, now seen corresponding path program 26 times [2021-06-05 15:24:28,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:28,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795671687] [2021-06-05 15:24:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:28,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795671687] [2021-06-05 15:24:28,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795671687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55190243] [2021-06-05 15:24:28,380 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:28,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:28,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:28,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:28,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:28,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:24:28,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:28,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:28,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:28,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:24:28,855 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:28,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:28,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:28,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:28,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:28,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:29,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55190243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:29,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:29,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:24:29,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409334768] [2021-06-05 15:24:29,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:29,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:29,089 INFO L87 Difference]: Start difference. First operand 4893 states and 14648 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:31,751 INFO L93 Difference]: Finished difference Result 5657 states and 16743 transitions. [2021-06-05 15:24:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:24:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:31,758 INFO L225 Difference]: With dead ends: 5657 [2021-06-05 15:24:31,758 INFO L226 Difference]: Without dead ends: 5520 [2021-06-05 15:24:31,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1734.8ms TimeCoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:24:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-06-05 15:24:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 4916. [2021-06-05 15:24:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4916 states, 4915 states have (on average 2.9936927772126145) internal successors, (14714), 4915 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4916 states to 4916 states and 14714 transitions. [2021-06-05 15:24:31,813 INFO L78 Accepts]: Start accepts. Automaton has 4916 states and 14714 transitions. Word has length 37 [2021-06-05 15:24:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 4916 states and 14714 transitions. [2021-06-05 15:24:31,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4916 states and 14714 transitions. [2021-06-05 15:24:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:31,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:31,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:32,020 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1456574164, now seen corresponding path program 27 times [2021-06-05 15:24:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996750896] [2021-06-05 15:24:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:32,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996750896] [2021-06-05 15:24:32,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996750896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:32,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733457088] [2021-06-05 15:24:32,339 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:32,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:24:32,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:32,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:32,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:24:32,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:32,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:32,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:32,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:24:32,868 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:24:32,868 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 34 treesize of output 18 [2021-06-05 15:24:32,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:32,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:32,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:32,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 15:24:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:33,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733457088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:33,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:33,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:24:33,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699327328] [2021-06-05 15:24:33,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:33,064 INFO L87 Difference]: Start difference. First operand 4916 states and 14714 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:35,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:35,979 INFO L93 Difference]: Finished difference Result 5782 states and 17101 transitions. [2021-06-05 15:24:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:24:35,980 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:35,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:35,987 INFO L225 Difference]: With dead ends: 5782 [2021-06-05 15:24:35,988 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 15:24:35,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1834.2ms TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:24:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 15:24:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4906. [2021-06-05 15:24:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 2.99388379204893) internal successors, (14685), 4905 states have internal predecessors, (14685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 14685 transitions. [2021-06-05 15:24:36,073 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 14685 transitions. Word has length 37 [2021-06-05 15:24:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:36,073 INFO L482 AbstractCegarLoop]: Abstraction has 4906 states and 14685 transitions. [2021-06-05 15:24:36,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 14685 transitions. [2021-06-05 15:24:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:36,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:36,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:36,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:36,280 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 249703014, now seen corresponding path program 28 times [2021-06-05 15:24:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:36,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343503839] [2021-06-05 15:24:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:36,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343503839] [2021-06-05 15:24:36,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343503839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:36,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261965838] [2021-06-05 15:24:36,646 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:36,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:24:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:24:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:36,904 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:24:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:24:36,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:36,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:36,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:36,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:24:37,060 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:37,060 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 37 treesize of output 21 [2021-06-05 15:24:37,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:37,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:37,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:37,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 15:24:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:37,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261965838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:37,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:37,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:24:37,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721558603] [2021-06-05 15:24:37,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:24:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:24:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:24:37,231 INFO L87 Difference]: Start difference. First operand 4906 states and 14685 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:39,043 INFO L93 Difference]: Finished difference Result 5906 states and 17467 transitions. [2021-06-05 15:24:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:24:39,043 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:39,050 INFO L225 Difference]: With dead ends: 5906 [2021-06-05 15:24:39,050 INFO L226 Difference]: Without dead ends: 5748 [2021-06-05 15:24:39,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1280.9ms TimeCoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:24:39,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2021-06-05 15:24:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 4888. [2021-06-05 15:24:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.9950890116635973) internal successors, (14637), 4887 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 14637 transitions. [2021-06-05 15:24:39,105 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 14637 transitions. Word has length 37 [2021-06-05 15:24:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:39,106 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 14637 transitions. [2021-06-05 15:24:39,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 14637 transitions. [2021-06-05 15:24:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:39,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:39,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:39,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:24:39,311 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1967025990, now seen corresponding path program 29 times [2021-06-05 15:24:39,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:39,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761785747] [2021-06-05 15:24:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:39,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761785747] [2021-06-05 15:24:39,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761785747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921288536] [2021-06-05 15:24:39,691 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:39,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:24:39,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:39,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:39,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:39,931 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 27 treesize of output 15 [2021-06-05 15:24:39,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:39,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:39,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:39,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:24:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:24:40,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:24:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:40,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:40,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:40,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:40,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:20 [2021-06-05 15:24:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921288536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:40,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:40,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:24:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871295918] [2021-06-05 15:24:40,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:24:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:24:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:24:40,428 INFO L87 Difference]: Start difference. First operand 4888 states and 14637 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:44,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:44,267 INFO L93 Difference]: Finished difference Result 8302 states and 24248 transitions. [2021-06-05 15:24:44,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:24:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:44,277 INFO L225 Difference]: With dead ends: 8302 [2021-06-05 15:24:44,278 INFO L226 Difference]: Without dead ends: 8083 [2021-06-05 15:24:44,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3327.1ms TimeCoverageRelationStatistics Valid=753, Invalid=7989, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:24:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-06-05 15:24:44,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 5052. [2021-06-05 15:24:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.9952484656503664) internal successors, (15129), 5051 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 15129 transitions. [2021-06-05 15:24:44,389 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 15129 transitions. Word has length 37 [2021-06-05 15:24:44,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:44,389 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 15129 transitions. [2021-06-05 15:24:44,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 15129 transitions. [2021-06-05 15:24:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:44,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:44,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:44,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:44,595 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash -270719750, now seen corresponding path program 30 times [2021-06-05 15:24:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:44,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313527652] [2021-06-05 15:24:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:44,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:44,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313527652] [2021-06-05 15:24:44,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313527652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:44,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151764229] [2021-06-05 15:24:44,933 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:44,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:24:44,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:45,168 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:45,168 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 27 treesize of output 15 [2021-06-05 15:24:45,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:45,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:45,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:45,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:24:45,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:45,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:24:45,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 15:24:45,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:45,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:45,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:45,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 15:24:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:45,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151764229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:45,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:45,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:24:45,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722639731] [2021-06-05 15:24:45,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:24:45,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:45,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:24:45,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:24:45,549 INFO L87 Difference]: Start difference. First operand 5052 states and 15129 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:47,034 INFO L93 Difference]: Finished difference Result 5549 states and 16371 transitions. [2021-06-05 15:24:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:24:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:47,041 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 15:24:47,041 INFO L226 Difference]: Without dead ends: 5492 [2021-06-05 15:24:47,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1471.8ms TimeCoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:24:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-06-05 15:24:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5096. [2021-06-05 15:24:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5096 states, 5095 states have (on average 2.991756624141315) internal successors, (15243), 5095 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 15243 transitions. [2021-06-05 15:24:47,122 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 15243 transitions. Word has length 37 [2021-06-05 15:24:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:47,122 INFO L482 AbstractCegarLoop]: Abstraction has 5096 states and 15243 transitions. [2021-06-05 15:24:47,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 15243 transitions. [2021-06-05 15:24:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:47,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:47,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:47,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:24:47,329 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash 583577300, now seen corresponding path program 31 times [2021-06-05 15:24:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:47,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551887807] [2021-06-05 15:24:47,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:47,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551887807] [2021-06-05 15:24:47,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551887807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584988244] [2021-06-05 15:24:47,705 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:47,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:47,941 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:24:47,941 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 [2021-06-05 15:24:47,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:47,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:47,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:47,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:24 [2021-06-05 15:24:48,182 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:48,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:48,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:48,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:48,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:48,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:48,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584988244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:48,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:48,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:24:48,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806110301] [2021-06-05 15:24:48,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:24:48,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:24:48,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:24:48,393 INFO L87 Difference]: Start difference. First operand 5096 states and 15243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:51,541 INFO L93 Difference]: Finished difference Result 7807 states and 22813 transitions. [2021-06-05 15:24:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:24:51,542 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:51,552 INFO L225 Difference]: With dead ends: 7807 [2021-06-05 15:24:51,552 INFO L226 Difference]: Without dead ends: 7588 [2021-06-05 15:24:51,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2643.2ms TimeCoverageRelationStatistics Valid=561, Invalid=6081, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:24:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-05 15:24:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 5071. [2021-06-05 15:24:51,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 5070 states have (on average 2.991518737672584) internal successors, (15167), 5070 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 15167 transitions. [2021-06-05 15:24:51,617 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 15167 transitions. Word has length 37 [2021-06-05 15:24:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:51,617 INFO L482 AbstractCegarLoop]: Abstraction has 5071 states and 15167 transitions. [2021-06-05 15:24:51,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 15167 transitions. [2021-06-05 15:24:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:51,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:51,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:51,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:51,823 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:51,823 INFO L82 PathProgramCache]: Analyzing trace with hash -451603996, now seen corresponding path program 32 times [2021-06-05 15:24:51,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:51,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313142954] [2021-06-05 15:24:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:52,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:52,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313142954] [2021-06-05 15:24:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313142954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:52,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465752961] [2021-06-05 15:24:52,182 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:52,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:52,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:24:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:52,462 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:52,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:24:52,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:52,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:52,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:52,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 15:24:52,735 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:52,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:24:52,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:52,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:52,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:52,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:24:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:52,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465752961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:52,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:52,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:24:52,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923562713] [2021-06-05 15:24:52,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:24:52,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:24:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:24:52,951 INFO L87 Difference]: Start difference. First operand 5071 states and 15167 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:56,097 INFO L93 Difference]: Finished difference Result 7932 states and 23187 transitions. [2021-06-05 15:24:56,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:24:56,097 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:24:56,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:56,107 INFO L225 Difference]: With dead ends: 7932 [2021-06-05 15:24:56,108 INFO L226 Difference]: Without dead ends: 7713 [2021-06-05 15:24:56,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2554.3ms TimeCoverageRelationStatistics Valid=504, Invalid=5976, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:24:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7713 states. [2021-06-05 15:24:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7713 to 5034. [2021-06-05 15:24:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 2.9920524538048876) internal successors, (15059), 5033 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 15059 transitions. [2021-06-05 15:24:56,174 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 15059 transitions. Word has length 37 [2021-06-05 15:24:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:56,174 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 15059 transitions. [2021-06-05 15:24:56,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 15059 transitions. [2021-06-05 15:24:56,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:24:56,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:56,179 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:56,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:24:56,380 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:56,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:56,380 INFO L82 PathProgramCache]: Analyzing trace with hash -613609226, now seen corresponding path program 33 times [2021-06-05 15:24:56,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:56,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921767404] [2021-06-05 15:24:56,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:56,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:56,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921767404] [2021-06-05 15:24:56,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921767404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:56,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657940851] [2021-06-05 15:24:56,717 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:56,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:24:56,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:56,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:24:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:56,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:24:56,951 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 27 treesize of output 15 [2021-06-05 15:24:56,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:56,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:56,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:56,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:24:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:24:57,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:24:57,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 15:24:57,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:24:57,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:24:57,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:24:57,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 15:24:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:57,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657940851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:57,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 15:24:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925566759] [2021-06-05 15:24:57,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:24:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:24:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:24:57,457 INFO L87 Difference]: Start difference. First operand 5034 states and 15059 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:01,137 INFO L93 Difference]: Finished difference Result 8035 states and 23567 transitions. [2021-06-05 15:25:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:25:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:01,146 INFO L225 Difference]: With dead ends: 8035 [2021-06-05 15:25:01,146 INFO L226 Difference]: Without dead ends: 7789 [2021-06-05 15:25:01,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2724.8ms TimeCoverageRelationStatistics Valid=511, Invalid=6131, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:25:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-06-05 15:25:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 5029. [2021-06-05 15:25:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 5028 states have (on average 2.991447891805887) internal successors, (15041), 5028 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 15041 transitions. [2021-06-05 15:25:01,215 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 15041 transitions. Word has length 37 [2021-06-05 15:25:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:01,215 INFO L482 AbstractCegarLoop]: Abstraction has 5029 states and 15041 transitions. [2021-06-05 15:25:01,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 15041 transitions. [2021-06-05 15:25:01,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:01,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:01,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:01,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 15:25:01,421 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:01,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:01,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1746600864, now seen corresponding path program 34 times [2021-06-05 15:25:01,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:01,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287695167] [2021-06-05 15:25:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:01,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:01,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287695167] [2021-06-05 15:25:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287695167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:01,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826478098] [2021-06-05 15:25:01,833 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:01,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:25:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:25:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:02,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:02,146 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 27 treesize of output 15 [2021-06-05 15:25:02,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:02,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:02,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:02,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:25:02,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:02,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:02,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:02,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:02,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:02,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:25:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:02,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826478098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:02,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:02,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:25:02,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5569674] [2021-06-05 15:25:02,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:25:02,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:02,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:25:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:25:02,611 INFO L87 Difference]: Start difference. First operand 5029 states and 15041 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:05,756 INFO L93 Difference]: Finished difference Result 8787 states and 26208 transitions. [2021-06-05 15:25:05,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:25:05,756 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:05,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:05,769 INFO L225 Difference]: With dead ends: 8787 [2021-06-05 15:25:05,769 INFO L226 Difference]: Without dead ends: 8664 [2021-06-05 15:25:05,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2493.9ms TimeCoverageRelationStatistics Valid=478, Invalid=5842, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:25:05,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-06-05 15:25:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 5522. [2021-06-05 15:25:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 3.009599710197428) internal successors, (16616), 5521 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 16616 transitions. [2021-06-05 15:25:05,860 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 16616 transitions. Word has length 37 [2021-06-05 15:25:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:05,860 INFO L482 AbstractCegarLoop]: Abstraction has 5522 states and 16616 transitions. [2021-06-05 15:25:05,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 16616 transitions. [2021-06-05 15:25:05,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:05,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:05,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:06,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:06,067 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:06,067 INFO L82 PathProgramCache]: Analyzing trace with hash -50294624, now seen corresponding path program 35 times [2021-06-05 15:25:06,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:06,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210944584] [2021-06-05 15:25:06,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:06,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210944584] [2021-06-05 15:25:06,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210944584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949899466] [2021-06-05 15:25:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:06,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:25:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:25:06,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:06,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:25:06,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:06,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:06,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:06,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:25:07,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:07,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 15:25:07,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:07,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:07,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:07,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:25:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:07,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949899466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:07,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:07,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 15:25:07,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443445602] [2021-06-05 15:25:07,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:25:07,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:07,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:25:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:25:07,250 INFO L87 Difference]: Start difference. First operand 5522 states and 16616 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:08,278 INFO L93 Difference]: Finished difference Result 5957 states and 17721 transitions. [2021-06-05 15:25:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:25:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:08,286 INFO L225 Difference]: With dead ends: 5957 [2021-06-05 15:25:08,286 INFO L226 Difference]: Without dead ends: 5921 [2021-06-05 15:25:08,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1383.4ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:25:08,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-05 15:25:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5638. [2021-06-05 15:25:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 3.0014191946070605) internal successors, (16919), 5637 states have internal predecessors, (16919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 16919 transitions. [2021-06-05 15:25:08,347 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 16919 transitions. Word has length 37 [2021-06-05 15:25:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:08,348 INFO L482 AbstractCegarLoop]: Abstraction has 5638 states and 16919 transitions. [2021-06-05 15:25:08,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 16919 transitions. [2021-06-05 15:25:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:08,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:08,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:08,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:08,554 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:08,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:08,554 INFO L82 PathProgramCache]: Analyzing trace with hash -114922920, now seen corresponding path program 36 times [2021-06-05 15:25:08,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:08,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598532893] [2021-06-05 15:25:08,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:08,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598532893] [2021-06-05 15:25:08,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598532893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:08,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463148055] [2021-06-05 15:25:08,967 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:09,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:25:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:25:09,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:25:09,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 15:25:09,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:09,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:09,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:09,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:37 [2021-06-05 15:25:09,727 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:09,727 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 38 treesize of output 22 [2021-06-05 15:25:09,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:09,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:09,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:09,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:25:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463148055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:09,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:09,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 15:25:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45963695] [2021-06-05 15:25:09,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:25:09,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:25:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:25:09,961 INFO L87 Difference]: Start difference. First operand 5638 states and 16919 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:12,582 INFO L93 Difference]: Finished difference Result 6973 states and 20672 transitions. [2021-06-05 15:25:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:25:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:12,591 INFO L225 Difference]: With dead ends: 6973 [2021-06-05 15:25:12,591 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 15:25:12,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2323.7ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:25:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 15:25:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 5709. [2021-06-05 15:25:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 2.994043447792572) internal successors, (17090), 5708 states have internal predecessors, (17090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17090 transitions. [2021-06-05 15:25:12,660 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17090 transitions. Word has length 37 [2021-06-05 15:25:12,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:12,660 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17090 transitions. [2021-06-05 15:25:12,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17090 transitions. [2021-06-05 15:25:12,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:12,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:12,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:12,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:12,867 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1399226358, now seen corresponding path program 37 times [2021-06-05 15:25:12,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:12,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766957154] [2021-06-05 15:25:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:13,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:13,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766957154] [2021-06-05 15:25:13,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766957154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:13,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100803381] [2021-06-05 15:25:13,255 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:25:13,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:13,694 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:25:13,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:13,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:13,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:13,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:25:13,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:13,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:13,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:13,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:13,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:13,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:25:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:13,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100803381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:13,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:13,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 15:25:13,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254577293] [2021-06-05 15:25:13,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:25:13,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:25:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:25:13,990 INFO L87 Difference]: Start difference. First operand 5709 states and 17090 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:16,404 INFO L93 Difference]: Finished difference Result 7129 states and 21094 transitions. [2021-06-05 15:25:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:25:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:16,414 INFO L225 Difference]: With dead ends: 7129 [2021-06-05 15:25:16,414 INFO L226 Difference]: Without dead ends: 6874 [2021-06-05 15:25:16,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1915.0ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:25:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2021-06-05 15:25:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 5817. [2021-06-05 15:25:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5816 states have (on average 2.9936382393397523) internal successors, (17411), 5816 states have internal predecessors, (17411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 17411 transitions. [2021-06-05 15:25:16,489 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 17411 transitions. Word has length 37 [2021-06-05 15:25:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:16,489 INFO L482 AbstractCegarLoop]: Abstraction has 5817 states and 17411 transitions. [2021-06-05 15:25:16,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 17411 transitions. [2021-06-05 15:25:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:16,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:16,496 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:16,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:25:16,696 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:16,697 INFO L82 PathProgramCache]: Analyzing trace with hash 970465330, now seen corresponding path program 38 times [2021-06-05 15:25:16,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:16,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101723875] [2021-06-05 15:25:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:17,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101723875] [2021-06-05 15:25:17,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101723875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062054055] [2021-06-05 15:25:17,099 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:17,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:25:17,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:17,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:25:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:17,361 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:17,361 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 27 treesize of output 15 [2021-06-05 15:25:17,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:17,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:17,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:17,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:17,560 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:17,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:17,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:17,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:17,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:25:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062054055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:17,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:17,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573886672] [2021-06-05 15:25:17,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:17,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:17,786 INFO L87 Difference]: Start difference. First operand 5817 states and 17411 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:20,180 INFO L93 Difference]: Finished difference Result 7091 states and 21040 transitions. [2021-06-05 15:25:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:25:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:20,189 INFO L225 Difference]: With dead ends: 7091 [2021-06-05 15:25:20,189 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 15:25:20,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1887.2ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:25:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 15:25:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5880. [2021-06-05 15:25:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5880 states, 5879 states have (on average 2.99319612178942) internal successors, (17597), 5879 states have internal predecessors, (17597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 17597 transitions. [2021-06-05 15:25:20,260 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 17597 transitions. Word has length 37 [2021-06-05 15:25:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:20,260 INFO L482 AbstractCegarLoop]: Abstraction has 5880 states and 17597 transitions. [2021-06-05 15:25:20,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 17597 transitions. [2021-06-05 15:25:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:20,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:20,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:20,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:20,467 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash -773898676, now seen corresponding path program 39 times [2021-06-05 15:25:20,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:20,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069997015] [2021-06-05 15:25:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:20,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:20,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069997015] [2021-06-05 15:25:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069997015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121581675] [2021-06-05 15:25:20,896 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:20,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:25:20,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:20,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:20,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:21,154 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:21,154 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 27 treesize of output 15 [2021-06-05 15:25:21,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:21,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:21,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:21,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:21,363 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:21,363 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 38 treesize of output 22 [2021-06-05 15:25:21,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:21,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:21,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:21,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:25:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:21,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121581675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:21,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:21,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:21,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971046689] [2021-06-05 15:25:21,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:21,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:21,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:21,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:21,567 INFO L87 Difference]: Start difference. First operand 5880 states and 17597 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:24,061 INFO L93 Difference]: Finished difference Result 7286 states and 21638 transitions. [2021-06-05 15:25:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:25:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:24,071 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 15:25:24,071 INFO L226 Difference]: Without dead ends: 7099 [2021-06-05 15:25:24,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1935.3ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:25:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2021-06-05 15:25:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 5901. [2021-06-05 15:25:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5901 states, 5900 states have (on average 2.99271186440678) internal successors, (17657), 5900 states have internal predecessors, (17657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5901 states to 5901 states and 17657 transitions. [2021-06-05 15:25:24,139 INFO L78 Accepts]: Start accepts. Automaton has 5901 states and 17657 transitions. Word has length 37 [2021-06-05 15:25:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:24,139 INFO L482 AbstractCegarLoop]: Abstraction has 5901 states and 17657 transitions. [2021-06-05 15:25:24,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5901 states and 17657 transitions. [2021-06-05 15:25:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:24,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:24,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:24,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:24,346 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:24,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1340355464, now seen corresponding path program 40 times [2021-06-05 15:25:24,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:24,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988888897] [2021-06-05 15:25:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:24,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:24,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988888897] [2021-06-05 15:25:24,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988888897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:24,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053504405] [2021-06-05 15:25:24,795 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:24,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:25:24,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:25,087 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:25:25,087 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 [2021-06-05 15:25:25,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:25,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:25,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:25,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:25:25,344 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:25,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-05 15:25:25,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:25,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:25,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:25,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:25:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053504405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:25,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:25,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633870208] [2021-06-05 15:25:25,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:25,528 INFO L87 Difference]: Start difference. First operand 5901 states and 17657 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:28,038 INFO L93 Difference]: Finished difference Result 7167 states and 21271 transitions. [2021-06-05 15:25:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:25:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:28,048 INFO L225 Difference]: With dead ends: 7167 [2021-06-05 15:25:28,048 INFO L226 Difference]: Without dead ends: 6967 [2021-06-05 15:25:28,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2038.9ms TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:25:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2021-06-05 15:25:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 5895. [2021-06-05 15:25:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 5894 states have (on average 2.993552765524262) internal successors, (17644), 5894 states have internal predecessors, (17644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 17644 transitions. [2021-06-05 15:25:28,128 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 17644 transitions. Word has length 37 [2021-06-05 15:25:28,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:28,129 INFO L482 AbstractCegarLoop]: Abstraction has 5895 states and 17644 transitions. [2021-06-05 15:25:28,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 17644 transitions. [2021-06-05 15:25:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:28,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:28,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:28,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 15:25:28,336 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1809079972, now seen corresponding path program 41 times [2021-06-05 15:25:28,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:28,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046838682] [2021-06-05 15:25:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:28,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046838682] [2021-06-05 15:25:28,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046838682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:28,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441824434] [2021-06-05 15:25:28,762 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:28,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:25:28,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:25:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:29,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:29,158 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 27 treesize of output 15 [2021-06-05 15:25:29,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:29,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:29,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:29,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:29,304 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:25:29,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:29,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:29,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:29,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:25:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:29,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441824434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:29,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:29,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:25:29,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456407765] [2021-06-05 15:25:29,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:25:29,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:25:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:25:29,489 INFO L87 Difference]: Start difference. First operand 5895 states and 17644 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:31,265 INFO L93 Difference]: Finished difference Result 7693 states and 22811 transitions. [2021-06-05 15:25:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:25:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:31,276 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 15:25:31,276 INFO L226 Difference]: Without dead ends: 7471 [2021-06-05 15:25:31,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1607.3ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:25:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2021-06-05 15:25:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 5928. [2021-06-05 15:25:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.9940948203138182) internal successors, (17746), 5927 states have internal predecessors, (17746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 17746 transitions. [2021-06-05 15:25:31,348 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 17746 transitions. Word has length 37 [2021-06-05 15:25:31,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:31,349 INFO L482 AbstractCegarLoop]: Abstraction has 5928 states and 17746 transitions. [2021-06-05 15:25:31,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:31,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 17746 transitions. [2021-06-05 15:25:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:31,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:31,355 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:31,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:31,555 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:31,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1971085202, now seen corresponding path program 42 times [2021-06-05 15:25:31,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:31,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108700679] [2021-06-05 15:25:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:31,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108700679] [2021-06-05 15:25:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108700679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924627459] [2021-06-05 15:25:31,988 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:32,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:25:32,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:32,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:32,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:32,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:32,252 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 27 treesize of output 15 [2021-06-05 15:25:32,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:32,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:32,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:32,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:32,460 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:32,460 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 36 treesize of output 20 [2021-06-05 15:25:32,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:32,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:32,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:32,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 15:25:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924627459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:32,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:32,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:32,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835838497] [2021-06-05 15:25:32,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:32,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:32,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:32,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:32,668 INFO L87 Difference]: Start difference. First operand 5928 states and 17746 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:35,046 INFO L93 Difference]: Finished difference Result 7495 states and 22284 transitions. [2021-06-05 15:25:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:25:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:35,056 INFO L225 Difference]: With dead ends: 7495 [2021-06-05 15:25:35,056 INFO L226 Difference]: Without dead ends: 7233 [2021-06-05 15:25:35,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1962.2ms TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:25:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7233 states. [2021-06-05 15:25:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7233 to 5931. [2021-06-05 15:25:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5931 states, 5930 states have (on average 2.997133220910624) internal successors, (17773), 5930 states have internal predecessors, (17773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 17773 transitions. [2021-06-05 15:25:35,128 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 17773 transitions. Word has length 37 [2021-06-05 15:25:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:35,129 INFO L482 AbstractCegarLoop]: Abstraction has 5931 states and 17773 transitions. [2021-06-05 15:25:35,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 17773 transitions. [2021-06-05 15:25:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:35,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:35,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:35,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 15:25:35,335 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:35,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1806920574, now seen corresponding path program 43 times [2021-06-05 15:25:35,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:35,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050799499] [2021-06-05 15:25:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050799499] [2021-06-05 15:25:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050799499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884852685] [2021-06-05 15:25:35,756 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:35,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:36,114 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:25:36,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:36,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:36,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:36,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 15:25:36,213 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:36,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:36,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:36,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:36,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:25:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:36,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884852685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:36,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:36,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 15:25:36,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944816125] [2021-06-05 15:25:36,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:25:36,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:36,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:25:36,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:25:36,394 INFO L87 Difference]: Start difference. First operand 5931 states and 17773 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:38,243 INFO L93 Difference]: Finished difference Result 7519 states and 22298 transitions. [2021-06-05 15:25:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:25:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:38,253 INFO L225 Difference]: With dead ends: 7519 [2021-06-05 15:25:38,253 INFO L226 Difference]: Without dead ends: 7264 [2021-06-05 15:25:38,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1536.0ms TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:25:38,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7264 states. [2021-06-05 15:25:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7264 to 6006. [2021-06-05 15:25:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 3.0) internal successors, (18015), 6005 states have internal predecessors, (18015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 18015 transitions. [2021-06-05 15:25:38,332 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 18015 transitions. Word has length 37 [2021-06-05 15:25:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:38,332 INFO L482 AbstractCegarLoop]: Abstraction has 6006 states and 18015 transitions. [2021-06-05 15:25:38,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 18015 transitions. [2021-06-05 15:25:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:38,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:38,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:38,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:38,539 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1378159546, now seen corresponding path program 44 times [2021-06-05 15:25:38,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:38,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377337816] [2021-06-05 15:25:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:38,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:38,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:38,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377337816] [2021-06-05 15:25:38,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377337816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:38,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614684465] [2021-06-05 15:25:38,929 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:38,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:25:38,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:25:38,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:39,192 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:39,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:25:39,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:39,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:39,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:39,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:25:39,390 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:39,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:39,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:39,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:39,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:25:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:39,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614684465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:39,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:39,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:39,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657101675] [2021-06-05 15:25:39,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:39,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:39,611 INFO L87 Difference]: Start difference. First operand 6006 states and 18015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:41,983 INFO L93 Difference]: Finished difference Result 7310 states and 21710 transitions. [2021-06-05 15:25:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:25:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:41,994 INFO L225 Difference]: With dead ends: 7310 [2021-06-05 15:25:41,994 INFO L226 Difference]: Without dead ends: 7120 [2021-06-05 15:25:41,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1832.4ms TimeCoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:25:42,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7120 states. [2021-06-05 15:25:42,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7120 to 6069. [2021-06-05 15:25:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 2.9995056031641396) internal successors, (18201), 6068 states have internal predecessors, (18201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:42,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 18201 transitions. [2021-06-05 15:25:42,068 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 18201 transitions. Word has length 37 [2021-06-05 15:25:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:42,068 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 18201 transitions. [2021-06-05 15:25:42,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 18201 transitions. [2021-06-05 15:25:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:42,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:42,074 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:42,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:25:42,277 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -366204460, now seen corresponding path program 45 times [2021-06-05 15:25:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:42,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246218253] [2021-06-05 15:25:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:42,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:42,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246218253] [2021-06-05 15:25:42,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246218253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:42,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975514719] [2021-06-05 15:25:42,686 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:42,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:25:42,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:42,947 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:42,947 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 27 treesize of output 15 [2021-06-05 15:25:42,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:42,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:42,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:42,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:43,178 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:43,179 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 38 treesize of output 22 [2021-06-05 15:25:43,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:43,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:43,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:43,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:25:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975514719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:43,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:43,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:43,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141350258] [2021-06-05 15:25:43,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:43,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:43,444 INFO L87 Difference]: Start difference. First operand 6069 states and 18201 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:46,003 INFO L93 Difference]: Finished difference Result 7505 states and 22308 transitions. [2021-06-05 15:25:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:25:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:46,013 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 15:25:46,013 INFO L226 Difference]: Without dead ends: 7318 [2021-06-05 15:25:46,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 2016.9ms TimeCoverageRelationStatistics Valid=227, Invalid=3313, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:25:46,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-05 15:25:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 6054. [2021-06-05 15:25:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 2.9986783413183544) internal successors, (18151), 6053 states have internal predecessors, (18151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18151 transitions. [2021-06-05 15:25:46,086 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18151 transitions. Word has length 37 [2021-06-05 15:25:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:46,087 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18151 transitions. [2021-06-05 15:25:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18151 transitions. [2021-06-05 15:25:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:46,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:46,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:46,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:46,294 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1748049680, now seen corresponding path program 46 times [2021-06-05 15:25:46,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:46,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364203023] [2021-06-05 15:25:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:46,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:46,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364203023] [2021-06-05 15:25:46,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364203023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:46,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593910926] [2021-06-05 15:25:46,681 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:46,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:25:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:46,943 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:25:46,944 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 [2021-06-05 15:25:46,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:46,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:46,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:46,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:25:47,208 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:47,208 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 30 treesize of output 18 [2021-06-05 15:25:47,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:47,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:47,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:47,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:25:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:47,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593910926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:47,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:47,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:47,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602889094] [2021-06-05 15:25:47,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:47,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:47,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:47,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:47,397 INFO L87 Difference]: Start difference. First operand 6054 states and 18151 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:49,974 INFO L93 Difference]: Finished difference Result 7386 states and 21941 transitions. [2021-06-05 15:25:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:25:49,974 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:49,984 INFO L225 Difference]: With dead ends: 7386 [2021-06-05 15:25:49,984 INFO L226 Difference]: Without dead ends: 7186 [2021-06-05 15:25:49,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1892.0ms TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:25:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-06-05 15:25:50,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6048. [2021-06-05 15:25:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 6047 states have (on average 2.999503886224574) internal successors, (18138), 6047 states have internal predecessors, (18138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 18138 transitions. [2021-06-05 15:25:50,065 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 18138 transitions. Word has length 37 [2021-06-05 15:25:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:50,066 INFO L482 AbstractCegarLoop]: Abstraction has 6048 states and 18138 transitions. [2021-06-05 15:25:50,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 18138 transitions. [2021-06-05 15:25:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:50,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:50,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:50,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:50,273 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1401385756, now seen corresponding path program 47 times [2021-06-05 15:25:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:50,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171352059] [2021-06-05 15:25:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:50,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171352059] [2021-06-05 15:25:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171352059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926602349] [2021-06-05 15:25:50,659 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:50,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:25:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:50,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:25:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:50,962 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:50,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:25:50,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:50,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:50,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:50,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:51,077 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:51,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:51,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:51,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:51,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 15:25:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:51,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926602349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:51,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:51,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:25:51,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460843839] [2021-06-05 15:25:51,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:25:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:51,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:25:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:25:51,260 INFO L87 Difference]: Start difference. First operand 6048 states and 18138 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:52,895 INFO L93 Difference]: Finished difference Result 7813 states and 23208 transitions. [2021-06-05 15:25:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:25:52,895 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:52,905 INFO L225 Difference]: With dead ends: 7813 [2021-06-05 15:25:52,905 INFO L226 Difference]: Without dead ends: 7591 [2021-06-05 15:25:52,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1460.7ms TimeCoverageRelationStatistics Valid=203, Invalid=2553, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:25:52,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2021-06-05 15:25:52,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 6027. [2021-06-05 15:25:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 6026 states have (on average 2.9995021573182874) internal successors, (18075), 6026 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 18075 transitions. [2021-06-05 15:25:52,979 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 18075 transitions. Word has length 37 [2021-06-05 15:25:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:52,980 INFO L482 AbstractCegarLoop]: Abstraction has 6027 states and 18075 transitions. [2021-06-05 15:25:52,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 18075 transitions. [2021-06-05 15:25:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:52,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:52,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:53,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 15:25:53,187 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1563390986, now seen corresponding path program 48 times [2021-06-05 15:25:53,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:53,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978565694] [2021-06-05 15:25:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:53,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978565694] [2021-06-05 15:25:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978565694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964203813] [2021-06-05 15:25:53,641 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:53,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:25:53,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:53,904 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:53,904 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 27 treesize of output 15 [2021-06-05 15:25:53,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:53,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:53,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:53,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:25:54,123 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:54,124 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 38 treesize of output 22 [2021-06-05 15:25:54,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:54,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:54,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:54,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:25:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:54,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964203813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:54,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:54,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:54,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156945294] [2021-06-05 15:25:54,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:54,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:54,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:54,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:54,330 INFO L87 Difference]: Start difference. First operand 6027 states and 18075 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:57,148 INFO L93 Difference]: Finished difference Result 7640 states and 22718 transitions. [2021-06-05 15:25:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:25:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:25:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:57,159 INFO L225 Difference]: With dead ends: 7640 [2021-06-05 15:25:57,159 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 15:25:57,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2083.0ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:25:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 15:25:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 5997. [2021-06-05 15:25:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0005003335557037) internal successors, (17991), 5996 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17991 transitions. [2021-06-05 15:25:57,240 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17991 transitions. Word has length 37 [2021-06-05 15:25:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:57,240 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17991 transitions. [2021-06-05 15:25:57,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:57,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17991 transitions. [2021-06-05 15:25:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:25:57,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:57,248 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:57,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:57,448 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:57,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1176430760, now seen corresponding path program 49 times [2021-06-05 15:25:57,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:57,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58264420] [2021-06-05 15:25:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:57,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58264420] [2021-06-05 15:25:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58264420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750913434] [2021-06-05 15:25:57,778 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:57,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:25:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:58,002 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:25:58,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:25:58,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:58,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:58,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:58,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:25:58,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:25:58,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:25:58,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:25:58,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:25:58,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:25:58,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:25:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:58,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750913434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:58,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:58,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:25:58,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265083256] [2021-06-05 15:25:58,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:25:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:58,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:25:58,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:25:58,459 INFO L87 Difference]: Start difference. First operand 5997 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:00,893 INFO L93 Difference]: Finished difference Result 7271 states and 21602 transitions. [2021-06-05 15:26:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:26:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:00,902 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 15:26:00,902 INFO L226 Difference]: Without dead ends: 7081 [2021-06-05 15:26:00,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1977.5ms TimeCoverageRelationStatistics Valid=264, Invalid=3396, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:26:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-05 15:26:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6030. [2021-06-05 15:26:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 6029 states have (on average 3.000995189915409) internal successors, (18093), 6029 states have internal predecessors, (18093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 18093 transitions. [2021-06-05 15:26:00,974 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 18093 transitions. Word has length 37 [2021-06-05 15:26:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:00,974 INFO L482 AbstractCegarLoop]: Abstraction has 6030 states and 18093 transitions. [2021-06-05 15:26:00,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:00,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 18093 transitions. [2021-06-05 15:26:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:00,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:00,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:01,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:26:01,185 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1374172530, now seen corresponding path program 50 times [2021-06-05 15:26:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:01,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453666411] [2021-06-05 15:26:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:01,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:01,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453666411] [2021-06-05 15:26:01,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453666411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:01,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001527464] [2021-06-05 15:26:01,534 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:01,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:26:01,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:01,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:01,756 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:01,756 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 27 treesize of output 15 [2021-06-05 15:26:01,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:01,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:01,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:01,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:26:01,995 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:01,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:02,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:02,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:02,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:02,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001527464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:02,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:02,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:02,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516209338] [2021-06-05 15:26:02,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:02,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:02,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:02,225 INFO L87 Difference]: Start difference. First operand 6030 states and 18093 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:04,631 INFO L93 Difference]: Finished difference Result 7463 states and 22192 transitions. [2021-06-05 15:26:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:26:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:04,640 INFO L225 Difference]: With dead ends: 7463 [2021-06-05 15:26:04,641 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 15:26:04,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1851.6ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:26:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 15:26:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6015. [2021-06-05 15:26:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 6014 states have (on average 3.0001662786830727) internal successors, (18043), 6014 states have internal predecessors, (18043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 18043 transitions. [2021-06-05 15:26:04,711 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 18043 transitions. Word has length 37 [2021-06-05 15:26:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:04,711 INFO L482 AbstractCegarLoop]: Abstraction has 6015 states and 18043 transitions. [2021-06-05 15:26:04,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 18043 transitions. [2021-06-05 15:26:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:04,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:04,717 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:04,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 15:26:04,918 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:04,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -806540626, now seen corresponding path program 51 times [2021-06-05 15:26:04,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:04,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761948898] [2021-06-05 15:26:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:05,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761948898] [2021-06-05 15:26:05,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761948898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:05,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76247479] [2021-06-05 15:26:05,251 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:05,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:26:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:05,490 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:05,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:05,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:05,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:05,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:26:05,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:05,783 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 24 [2021-06-05 15:26:05,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:05,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:05,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:05,791 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:26:06,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:06,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76247479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:06,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:06,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:06,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702076850] [2021-06-05 15:26:06,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:06,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:06,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:06,004 INFO L87 Difference]: Start difference. First operand 6015 states and 18043 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:08,692 INFO L93 Difference]: Finished difference Result 7363 states and 21872 transitions. [2021-06-05 15:26:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:26:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:08,703 INFO L225 Difference]: With dead ends: 7363 [2021-06-05 15:26:08,703 INFO L226 Difference]: Without dead ends: 7163 [2021-06-05 15:26:08,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2012.8ms TimeCoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:26:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-06-05 15:26:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6009. [2021-06-05 15:26:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 3.0009986684420773) internal successors, (18030), 6008 states have internal predecessors, (18030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 18030 transitions. [2021-06-05 15:26:08,775 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 18030 transitions. Word has length 37 [2021-06-05 15:26:08,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:08,775 INFO L482 AbstractCegarLoop]: Abstraction has 6009 states and 18030 transitions. [2021-06-05 15:26:08,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 18030 transitions. [2021-06-05 15:26:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:08,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:08,781 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:08,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:08,985 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash 338991234, now seen corresponding path program 52 times [2021-06-05 15:26:08,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:08,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996044] [2021-06-05 15:26:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:09,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:09,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996044] [2021-06-05 15:26:09,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:09,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952808985] [2021-06-05 15:26:09,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:09,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:26:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:09,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:09,698 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:26:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:26:09,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:09,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:09,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:09,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:26:09,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:09,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:09,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:09,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:09,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952808985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:10,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:10,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456283021] [2021-06-05 15:26:10,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:10,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:10,193 INFO L87 Difference]: Start difference. First operand 6009 states and 18030 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:12,826 INFO L93 Difference]: Finished difference Result 7661 states and 22805 transitions. [2021-06-05 15:26:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:26:12,827 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:12,836 INFO L225 Difference]: With dead ends: 7661 [2021-06-05 15:26:12,836 INFO L226 Difference]: Without dead ends: 7474 [2021-06-05 15:26:12,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2051.7ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:26:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-06-05 15:26:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 5997. [2021-06-05 15:26:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0) internal successors, (17988), 5996 states have internal predecessors, (17988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17988 transitions. [2021-06-05 15:26:12,911 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17988 transitions. Word has length 37 [2021-06-05 15:26:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:12,911 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17988 transitions. [2021-06-05 15:26:12,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17988 transitions. [2021-06-05 15:26:12,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:12,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:12,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:13,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:13,118 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:13,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:13,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1841721922, now seen corresponding path program 53 times [2021-06-05 15:26:13,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:13,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442370679] [2021-06-05 15:26:13,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:13,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:13,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442370679] [2021-06-05 15:26:13,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442370679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:13,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634536175] [2021-06-05 15:26:13,448 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:13,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:26:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:26:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:13,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:13,673 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 27 treesize of output 15 [2021-06-05 15:26:13,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:13,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:13,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:13,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:26:13,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:13,849 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 27 treesize of output 15 [2021-06-05 15:26:13,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:13,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:13,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:13,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 15:26:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634536175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:13,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:13,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:26:13,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994540266] [2021-06-05 15:26:13,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:26:13,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:26:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:26:13,997 INFO L87 Difference]: Start difference. First operand 5997 states and 17988 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:15,880 INFO L93 Difference]: Finished difference Result 7627 states and 22648 transitions. [2021-06-05 15:26:15,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:26:15,880 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:15,889 INFO L225 Difference]: With dead ends: 7627 [2021-06-05 15:26:15,889 INFO L226 Difference]: Without dead ends: 7411 [2021-06-05 15:26:15,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1438.0ms TimeCoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:26:15,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-06-05 15:26:15,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6054. [2021-06-05 15:26:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 3.000165207335206) internal successors, (18160), 6053 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18160 transitions. [2021-06-05 15:26:15,956 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18160 transitions. Word has length 37 [2021-06-05 15:26:15,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:15,956 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18160 transitions. [2021-06-05 15:26:15,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18160 transitions. [2021-06-05 15:26:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:15,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:15,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:16,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:16,163 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:16,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash 176986004, now seen corresponding path program 54 times [2021-06-05 15:26:16,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:16,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991267140] [2021-06-05 15:26:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:16,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991267140] [2021-06-05 15:26:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991267140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155894998] [2021-06-05 15:26:16,587 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:16,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:26:16,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:16,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:16,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:16,860 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 27 treesize of output 15 [2021-06-05 15:26:16,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:16,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:16,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:16,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:26:17,095 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:17,096 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 36 treesize of output 20 [2021-06-05 15:26:17,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:17,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:17,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:17,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 15:26:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:17,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155894998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:17,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:17,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:17,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648613802] [2021-06-05 15:26:17,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:17,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:17,309 INFO L87 Difference]: Start difference. First operand 6054 states and 18160 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:19,801 INFO L93 Difference]: Finished difference Result 7609 states and 22651 transitions. [2021-06-05 15:26:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:26:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:19,811 INFO L225 Difference]: With dead ends: 7609 [2021-06-05 15:26:19,811 INFO L226 Difference]: Without dead ends: 7359 [2021-06-05 15:26:19,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 2034.6ms TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:26:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7359 states. [2021-06-05 15:26:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7359 to 6003. [2021-06-05 15:26:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 3.002832389203599) internal successors, (18023), 6002 states have internal predecessors, (18023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 18023 transitions. [2021-06-05 15:26:19,883 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 18023 transitions. Word has length 37 [2021-06-05 15:26:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:19,883 INFO L482 AbstractCegarLoop]: Abstraction has 6003 states and 18023 transitions. [2021-06-05 15:26:19,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 18023 transitions. [2021-06-05 15:26:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:19,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:19,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:20,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 15:26:20,093 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -956005634, now seen corresponding path program 55 times [2021-06-05 15:26:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687266930] [2021-06-05 15:26:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:20,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687266930] [2021-06-05 15:26:20,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687266930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:20,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126659061] [2021-06-05 15:26:20,430 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:20,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:20,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:20,658 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 27 treesize of output 15 [2021-06-05 15:26:20,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:20,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:20,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:20,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:26:20,898 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:20,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:20,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:20,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:20,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:21,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126659061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:21,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:21,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:21,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504541385] [2021-06-05 15:26:21,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:21,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:21,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:21,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:21,122 INFO L87 Difference]: Start difference. First operand 6003 states and 18023 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:23,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:23,921 INFO L93 Difference]: Finished difference Result 7853 states and 23572 transitions. [2021-06-05 15:26:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:26:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:23,931 INFO L225 Difference]: With dead ends: 7853 [2021-06-05 15:26:23,931 INFO L226 Difference]: Without dead ends: 7774 [2021-06-05 15:26:23,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1990.8ms TimeCoverageRelationStatistics Valid=258, Invalid=3524, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:26:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-05 15:26:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 5995. [2021-06-05 15:26:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5994 states have (on average 3.002836169502836) internal successors, (17999), 5994 states have internal predecessors, (17999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 17999 transitions. [2021-06-05 15:26:24,005 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 17999 transitions. Word has length 37 [2021-06-05 15:26:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:24,005 INFO L482 AbstractCegarLoop]: Abstraction has 5995 states and 17999 transitions. [2021-06-05 15:26:24,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:24,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 17999 transitions. [2021-06-05 15:26:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:24,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:24,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:24,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:24,212 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1158248506, now seen corresponding path program 56 times [2021-06-05 15:26:24,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:24,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305597443] [2021-06-05 15:26:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:24,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:24,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305597443] [2021-06-05 15:26:24,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305597443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:24,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009397530] [2021-06-05 15:26:24,611 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:24,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:26:24,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:24,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:24,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:24,925 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 27 treesize of output 15 [2021-06-05 15:26:24,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:24,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:24,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:24,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:26:25,212 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:25,213 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 30 treesize of output 18 [2021-06-05 15:26:25,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:25,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:25,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:25,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:26:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009397530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:25,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:25,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:25,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102979387] [2021-06-05 15:26:25,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:25,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:25,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:25,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:25,398 INFO L87 Difference]: Start difference. First operand 5995 states and 17999 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:28,360 INFO L93 Difference]: Finished difference Result 8024 states and 24069 transitions. [2021-06-05 15:26:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:26:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:28,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:28,371 INFO L225 Difference]: With dead ends: 8024 [2021-06-05 15:26:28,372 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 15:26:28,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2259.4ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:26:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 15:26:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 5992. [2021-06-05 15:26:28,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 15:26:28,455 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 15:26:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:28,455 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 15:26:28,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 15:26:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:28,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:28,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:28,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 15:26:28,662 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:28,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -48622644, now seen corresponding path program 57 times [2021-06-05 15:26:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:28,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814414559] [2021-06-05 15:26:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:28,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:28,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814414559] [2021-06-05 15:26:28,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814414559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:28,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947143075] [2021-06-05 15:26:28,989 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:26:29,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:29,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:29,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:29,253 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 27 treesize of output 15 [2021-06-05 15:26:29,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:29,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:29,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:29,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:26:29,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:26:29,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:26:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-06-05 15:26:29,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:29,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:29,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:29,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:23 [2021-06-05 15:26:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:29,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947143075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:29,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:29,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34380679] [2021-06-05 15:26:29,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:29,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:29,888 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:32,817 INFO L93 Difference]: Finished difference Result 7723 states and 23124 transitions. [2021-06-05 15:26:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:26:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:32,849 INFO L225 Difference]: With dead ends: 7723 [2021-06-05 15:26:32,849 INFO L226 Difference]: Without dead ends: 7644 [2021-06-05 15:26:32,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2306.4ms TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:26:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7644 states. [2021-06-05 15:26:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7644 to 5992. [2021-06-05 15:26:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 15:26:32,918 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 15:26:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:32,918 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 15:26:32,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 15:26:32,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:32,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:32,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:33,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 15:26:33,125 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:33,126 INFO L82 PathProgramCache]: Analyzing trace with hash -673013410, now seen corresponding path program 58 times [2021-06-05 15:26:33,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:33,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973404682] [2021-06-05 15:26:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:33,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:33,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973404682] [2021-06-05 15:26:33,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973404682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:33,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820863385] [2021-06-05 15:26:33,600 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:33,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:26:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:34,004 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:34,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:26:34,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:34,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:34,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:34,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:26:34,085 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:34,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:34,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:34,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:34,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:34,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:34,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820863385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:34,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:34,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 15:26:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210908637] [2021-06-05 15:26:34,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:26:34,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:34,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:26:34,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:26:34,278 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:39,986 INFO L93 Difference]: Finished difference Result 15123 states and 44674 transitions. [2021-06-05 15:26:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 15:26:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:40,005 INFO L225 Difference]: With dead ends: 15123 [2021-06-05 15:26:40,005 INFO L226 Difference]: Without dead ends: 14752 [2021-06-05 15:26:40,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 4699.7ms TimeCoverageRelationStatistics Valid=1442, Invalid=13810, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 15:26:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2021-06-05 15:26:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 6984. [2021-06-05 15:26:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 3.0221967635686666) internal successors, (21104), 6983 states have internal predecessors, (21104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 21104 transitions. [2021-06-05 15:26:40,119 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 21104 transitions. Word has length 37 [2021-06-05 15:26:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:40,119 INFO L482 AbstractCegarLoop]: Abstraction has 6984 states and 21104 transitions. [2021-06-05 15:26:40,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 21104 transitions. [2021-06-05 15:26:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:40,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:40,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:40,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:26:40,328 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1023292830, now seen corresponding path program 59 times [2021-06-05 15:26:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:40,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009147215] [2021-06-05 15:26:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:40,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:40,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009147215] [2021-06-05 15:26:40,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009147215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:40,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798425497] [2021-06-05 15:26:40,741 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:40,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:26:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 15:26:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:26:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:26:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:26:41,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:26:41,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:41,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:41,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:41,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:29 [2021-06-05 15:26:41,293 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:41,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:41,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:41,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:41,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:41,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:41,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798425497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:41,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:41,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:41,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691719752] [2021-06-05 15:26:41,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:41,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:41,523 INFO L87 Difference]: Start difference. First operand 6984 states and 21104 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:46,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:46,461 INFO L93 Difference]: Finished difference Result 11739 states and 35096 transitions. [2021-06-05 15:26:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:26:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:46,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:46,475 INFO L225 Difference]: With dead ends: 11739 [2021-06-05 15:26:46,475 INFO L226 Difference]: Without dead ends: 11268 [2021-06-05 15:26:46,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3106.6ms TimeCoverageRelationStatistics Valid=463, Invalid=7369, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 15:26:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2021-06-05 15:26:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 7469. [2021-06-05 15:26:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7469 states, 7468 states have (on average 3.0265131226566684) internal successors, (22602), 7468 states have internal predecessors, (22602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7469 states to 7469 states and 22602 transitions. [2021-06-05 15:26:46,590 INFO L78 Accepts]: Start accepts. Automaton has 7469 states and 22602 transitions. Word has length 37 [2021-06-05 15:26:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:46,590 INFO L482 AbstractCegarLoop]: Abstraction has 7469 states and 22602 transitions. [2021-06-05 15:26:46,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7469 states and 22602 transitions. [2021-06-05 15:26:46,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:46,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:46,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:46,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:46,800 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:46,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:46,800 INFO L82 PathProgramCache]: Analyzing trace with hash -786061334, now seen corresponding path program 60 times [2021-06-05 15:26:46,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:46,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322629069] [2021-06-05 15:26:46,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:47,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:47,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322629069] [2021-06-05 15:26:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322629069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604546336] [2021-06-05 15:26:47,178 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:47,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:26:47,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:47,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:47,558 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:26:47,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:47,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:47,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:47,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 15:26:47,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:47,648 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 43 treesize of output 23 [2021-06-05 15:26:47,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:47,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:47,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:47,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:26:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:47,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604546336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:47,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:47,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119890968] [2021-06-05 15:26:47,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:47,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:47,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:47,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:47,848 INFO L87 Difference]: Start difference. First operand 7469 states and 22602 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:50,926 INFO L93 Difference]: Finished difference Result 10651 states and 31890 transitions. [2021-06-05 15:26:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:26:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:50,940 INFO L225 Difference]: With dead ends: 10651 [2021-06-05 15:26:50,940 INFO L226 Difference]: Without dead ends: 10387 [2021-06-05 15:26:50,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2133.8ms TimeCoverageRelationStatistics Valid=283, Invalid=4007, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:26:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10387 states. [2021-06-05 15:26:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10387 to 7433. [2021-06-05 15:26:51,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.0278525296017222) internal successors, (22503), 7432 states have internal predecessors, (22503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 22503 transitions. [2021-06-05 15:26:51,040 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 22503 transitions. Word has length 37 [2021-06-05 15:26:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:51,040 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 22503 transitions. [2021-06-05 15:26:51,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:51,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 22503 transitions. [2021-06-05 15:26:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:51,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:51,048 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:51,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:51,248 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1016751930, now seen corresponding path program 61 times [2021-06-05 15:26:51,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935354666] [2021-06-05 15:26:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:51,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:51,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935354666] [2021-06-05 15:26:51,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935354666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:51,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110350708] [2021-06-05 15:26:51,609 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:51,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:51,959 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:51,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:26:51,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:51,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:51,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:51,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:26:52,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:52,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:52,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:52,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:52,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:52,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:52,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110350708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:52,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:52,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:26:52,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000889047] [2021-06-05 15:26:52,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:26:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:26:52,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:26:52,288 INFO L87 Difference]: Start difference. First operand 7433 states and 22503 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:54,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:54,958 INFO L93 Difference]: Finished difference Result 11447 states and 33952 transitions. [2021-06-05 15:26:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:26:54,959 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:54,974 INFO L225 Difference]: With dead ends: 11447 [2021-06-05 15:26:54,974 INFO L226 Difference]: Without dead ends: 11273 [2021-06-05 15:26:54,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2532.9ms TimeCoverageRelationStatistics Valid=584, Invalid=5422, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:26:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2021-06-05 15:26:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 7538. [2021-06-05 15:26:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 3.02162664189996) internal successors, (22774), 7537 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 22774 transitions. [2021-06-05 15:26:55,088 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 22774 transitions. Word has length 37 [2021-06-05 15:26:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:55,088 INFO L482 AbstractCegarLoop]: Abstraction has 7538 states and 22774 transitions. [2021-06-05 15:26:55,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:55,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 22774 transitions. [2021-06-05 15:26:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:55,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:55,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:55,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 15:26:55,298 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:55,298 INFO L82 PathProgramCache]: Analyzing trace with hash 679554310, now seen corresponding path program 62 times [2021-06-05 15:26:55,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:55,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627059288] [2021-06-05 15:26:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:55,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627059288] [2021-06-05 15:26:55,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627059288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505777379] [2021-06-05 15:26:55,703 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:55,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:26:55,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:55,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:56,067 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:56,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:26:56,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:56,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:56,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:56,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:26:56,152 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:56,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:56,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:56,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:56,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:26:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:56,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505777379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:56,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:56,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 15:26:56,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662002808] [2021-06-05 15:26:56,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:26:56,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:26:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:26:56,373 INFO L87 Difference]: Start difference. First operand 7538 states and 22774 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:58,640 INFO L93 Difference]: Finished difference Result 9009 states and 27002 transitions. [2021-06-05 15:26:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:26:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:26:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:58,680 INFO L225 Difference]: With dead ends: 9009 [2021-06-05 15:26:58,681 INFO L226 Difference]: Without dead ends: 8777 [2021-06-05 15:26:58,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1859.5ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:26:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2021-06-05 15:26:58,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7508. [2021-06-05 15:26:58,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.026775009990675) internal successors, (22722), 7507 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 22722 transitions. [2021-06-05 15:26:58,774 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 22722 transitions. Word has length 37 [2021-06-05 15:26:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 22722 transitions. [2021-06-05 15:26:58,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 22722 transitions. [2021-06-05 15:26:58,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:26:58,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:58,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:58,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 15:26:58,983 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1445512958, now seen corresponding path program 63 times [2021-06-05 15:26:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:58,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184752891] [2021-06-05 15:26:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:59,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184752891] [2021-06-05 15:26:59,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184752891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430976012] [2021-06-05 15:26:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:59,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:26:59,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:59,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:59,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:59,642 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:59,642 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 27 treesize of output 15 [2021-06-05 15:26:59,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:59,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:59,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:59,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:26:59,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:26:59,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:26:59,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:26:59,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:26:59,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:26:59,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:00,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430976012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:00,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:00,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:00,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831731591] [2021-06-05 15:27:00,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:00,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:00,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:00,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:00,032 INFO L87 Difference]: Start difference. First operand 7508 states and 22722 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:03,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:03,627 INFO L93 Difference]: Finished difference Result 12734 states and 37798 transitions. [2021-06-05 15:27:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:27:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:03,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:03,644 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 15:27:03,644 INFO L226 Difference]: Without dead ends: 12455 [2021-06-05 15:27:03,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 3020.8ms TimeCoverageRelationStatistics Valid=653, Invalid=6319, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:27:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2021-06-05 15:27:03,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 7592. [2021-06-05 15:27:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7592 states, 7591 states have (on average 3.0243709656171784) internal successors, (22958), 7591 states have internal predecessors, (22958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 22958 transitions. [2021-06-05 15:27:03,757 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 22958 transitions. Word has length 37 [2021-06-05 15:27:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:03,757 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 22958 transitions. [2021-06-05 15:27:03,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 22958 transitions. [2021-06-05 15:27:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:03,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:03,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:03,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:03,966 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:03,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:03,966 INFO L82 PathProgramCache]: Analyzing trace with hash 250793282, now seen corresponding path program 64 times [2021-06-05 15:27:03,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:03,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743985323] [2021-06-05 15:27:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:04,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743985323] [2021-06-05 15:27:04,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743985323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545578161] [2021-06-05 15:27:04,332 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:04,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:27:04,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:04,621 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:27:04,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:27:04,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:04,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:04,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:04,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:27:04,823 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:04,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:04,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:04,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:04,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545578161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:05,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:05,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323657167] [2021-06-05 15:27:05,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:05,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:05,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:05,092 INFO L87 Difference]: Start difference. First operand 7592 states and 22958 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:07,704 INFO L93 Difference]: Finished difference Result 9142 states and 27401 transitions. [2021-06-05 15:27:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:27:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:07,716 INFO L225 Difference]: With dead ends: 9142 [2021-06-05 15:27:07,716 INFO L226 Difference]: Without dead ends: 8975 [2021-06-05 15:27:07,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2057.1ms TimeCoverageRelationStatistics Valid=249, Invalid=3533, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:27:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-06-05 15:27:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 7577. [2021-06-05 15:27:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.0258711721224922) internal successors, (22924), 7576 states have internal predecessors, (22924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 22924 transitions. [2021-06-05 15:27:07,813 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 22924 transitions. Word has length 37 [2021-06-05 15:27:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:07,813 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 22924 transitions. [2021-06-05 15:27:07,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 22924 transitions. [2021-06-05 15:27:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:07,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:07,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:08,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 15:27:08,022 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:08,022 INFO L82 PathProgramCache]: Analyzing trace with hash 785550070, now seen corresponding path program 65 times [2021-06-05 15:27:08,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:08,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978963110] [2021-06-05 15:27:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:08,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978963110] [2021-06-05 15:27:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978963110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006283988] [2021-06-05 15:27:08,445 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:08,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:27:08,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:08,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:08,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:08,698 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:08,698 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 27 treesize of output 15 [2021-06-05 15:27:08,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:08,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:08,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:08,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:08,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:08,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:27:08,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:08,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:08,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:08,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:27:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:08,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006283988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:08,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:08,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:27:08,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206007006] [2021-06-05 15:27:08,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:27:08,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:27:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:27:08,996 INFO L87 Difference]: Start difference. First operand 7577 states and 22924 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:10,893 INFO L93 Difference]: Finished difference Result 11020 states and 32999 transitions. [2021-06-05 15:27:10,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:27:10,893 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:10,907 INFO L225 Difference]: With dead ends: 11020 [2021-06-05 15:27:10,907 INFO L226 Difference]: Without dead ends: 10795 [2021-06-05 15:27:10,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1530.5ms TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:27:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-06-05 15:27:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 7607. [2021-06-05 15:27:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 3.0262950302392846) internal successors, (23018), 7606 states have internal predecessors, (23018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 23018 transitions. [2021-06-05 15:27:11,039 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 23018 transitions. Word has length 37 [2021-06-05 15:27:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:11,039 INFO L482 AbstractCegarLoop]: Abstraction has 7607 states and 23018 transitions. [2021-06-05 15:27:11,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 23018 transitions. [2021-06-05 15:27:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:11,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:11,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:11,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:11,247 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:11,248 INFO L82 PathProgramCache]: Analyzing trace with hash -92096194, now seen corresponding path program 66 times [2021-06-05 15:27:11,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:11,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976103568] [2021-06-05 15:27:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:11,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:11,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976103568] [2021-06-05 15:27:11,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976103568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:11,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067730898] [2021-06-05 15:27:11,596 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:11,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:27:11,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:27:11,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:11,842 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:11,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:27:11,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:11,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:11,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:11,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:12,033 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:12,034 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 36 treesize of output 20 [2021-06-05 15:27:12,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:12,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:12,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 15:27:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067730898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:12,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:12,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:12,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591028874] [2021-06-05 15:27:12,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:12,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:12,223 INFO L87 Difference]: Start difference. First operand 7607 states and 23018 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:15,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:15,076 INFO L93 Difference]: Finished difference Result 10794 states and 31781 transitions. [2021-06-05 15:27:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:27:15,076 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:15,089 INFO L225 Difference]: With dead ends: 10794 [2021-06-05 15:27:15,089 INFO L226 Difference]: Without dead ends: 10591 [2021-06-05 15:27:15,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 2528.2ms TimeCoverageRelationStatistics Valid=551, Invalid=5769, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:27:15,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10591 states. [2021-06-05 15:27:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10591 to 7648. [2021-06-05 15:27:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7647 states have (on average 3.024192493788414) internal successors, (23126), 7647 states have internal predecessors, (23126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 23126 transitions. [2021-06-05 15:27:15,188 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 23126 transitions. Word has length 37 [2021-06-05 15:27:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:15,188 INFO L482 AbstractCegarLoop]: Abstraction has 7648 states and 23126 transitions. [2021-06-05 15:27:15,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:15,188 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 23126 transitions. [2021-06-05 15:27:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:15,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:15,196 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:15,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 15:27:15,397 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1604210046, now seen corresponding path program 67 times [2021-06-05 15:27:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:15,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274786459] [2021-06-05 15:27:15,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:15,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:15,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:15,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274786459] [2021-06-05 15:27:15,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274786459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:15,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653134011] [2021-06-05 15:27:15,762 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:16,031 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:27:16,031 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 [2021-06-05 15:27:16,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:16,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:16,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:16,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:27:16,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:16,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:16,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:16,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:16,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:16,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:16,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653134011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:16,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:16,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:16,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049105324] [2021-06-05 15:27:16,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:16,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:16,464 INFO L87 Difference]: Start difference. First operand 7648 states and 23126 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:18,992 INFO L93 Difference]: Finished difference Result 9289 states and 27935 transitions. [2021-06-05 15:27:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:27:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:19,004 INFO L225 Difference]: With dead ends: 9289 [2021-06-05 15:27:19,005 INFO L226 Difference]: Without dead ends: 9125 [2021-06-05 15:27:19,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1907.9ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:27:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-06-05 15:27:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 7732. [2021-06-05 15:27:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 3.024835079549864) internal successors, (23385), 7731 states have internal predecessors, (23385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 23385 transitions. [2021-06-05 15:27:19,099 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 23385 transitions. Word has length 37 [2021-06-05 15:27:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:19,099 INFO L482 AbstractCegarLoop]: Abstraction has 7732 states and 23385 transitions. [2021-06-05 15:27:19,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 23385 transitions. [2021-06-05 15:27:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:19,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:19,108 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:19,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 15:27:19,308 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash -576503110, now seen corresponding path program 68 times [2021-06-05 15:27:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:19,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682832936] [2021-06-05 15:27:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:19,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682832936] [2021-06-05 15:27:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682832936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:19,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093370546] [2021-06-05 15:27:19,691 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:19,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:27:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:27:19,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:19,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:19,964 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 27 treesize of output 15 [2021-06-05 15:27:19,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:19,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:19,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:19,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:20,219 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:20,220 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 30 treesize of output 18 [2021-06-05 15:27:20,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:20,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:20,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:20,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:27:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093370546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:20,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:20,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022908572] [2021-06-05 15:27:20,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:20,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:20,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:20,416 INFO L87 Difference]: Start difference. First operand 7732 states and 23385 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:22,772 INFO L93 Difference]: Finished difference Result 9355 states and 28210 transitions. [2021-06-05 15:27:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:27:22,772 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:22,785 INFO L225 Difference]: With dead ends: 9355 [2021-06-05 15:27:22,785 INFO L226 Difference]: Without dead ends: 9181 [2021-06-05 15:27:22,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1986.1ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:27:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-06-05 15:27:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 7751. [2021-06-05 15:27:22,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.025161290322581) internal successors, (23445), 7750 states have internal predecessors, (23445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 23445 transitions. [2021-06-05 15:27:22,887 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 23445 transitions. Word has length 37 [2021-06-05 15:27:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:22,887 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 23445 transitions. [2021-06-05 15:27:22,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 23445 transitions. [2021-06-05 15:27:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:22,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:22,895 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:23,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:27:23,107 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:23,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:23,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1783374260, now seen corresponding path program 69 times [2021-06-05 15:27:23,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:23,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41705772] [2021-06-05 15:27:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:23,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:23,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41705772] [2021-06-05 15:27:23,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41705772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:23,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506803394] [2021-06-05 15:27:23,455 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:23,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:27:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:23,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:23,761 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 27 treesize of output 15 [2021-06-05 15:27:23,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:23,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:23,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:23,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:24,008 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:24,008 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 34 treesize of output 18 [2021-06-05 15:27:24,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:24,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:24,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:24,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 15:27:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:24,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506803394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:24,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:24,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613640869] [2021-06-05 15:27:24,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:24,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:24,192 INFO L87 Difference]: Start difference. First operand 7751 states and 23445 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:26,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:26,515 INFO L93 Difference]: Finished difference Result 9507 states and 28682 transitions. [2021-06-05 15:27:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:27:26,516 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:26,528 INFO L225 Difference]: With dead ends: 9507 [2021-06-05 15:27:26,528 INFO L226 Difference]: Without dead ends: 9289 [2021-06-05 15:27:26,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1800.2ms TimeCoverageRelationStatistics Valid=215, Invalid=2977, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:27:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2021-06-05 15:27:26,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 7726. [2021-06-05 15:27:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7725 states have (on average 3.029514563106796) internal successors, (23403), 7725 states have internal predecessors, (23403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 23403 transitions. [2021-06-05 15:27:26,678 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 23403 transitions. Word has length 37 [2021-06-05 15:27:26,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:26,678 INFO L482 AbstractCegarLoop]: Abstraction has 7726 states and 23403 transitions. [2021-06-05 15:27:26,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 23403 transitions. [2021-06-05 15:27:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:26,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:26,687 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:26,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:26,889 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1549469464, now seen corresponding path program 70 times [2021-06-05 15:27:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:26,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423175373] [2021-06-05 15:27:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:27,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:27,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423175373] [2021-06-05 15:27:27,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423175373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:27,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509451190] [2021-06-05 15:27:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:27,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:27:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:27:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:27,550 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:27,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:27:27,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:27,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:27,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:27,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:27:27,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:27,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:27,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:27,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:27,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:27,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:27,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509451190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:27,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:27,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 15:27:27,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472408220] [2021-06-05 15:27:27,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:27:27,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:27:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:27:27,815 INFO L87 Difference]: Start difference. First operand 7726 states and 23403 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:32,616 INFO L93 Difference]: Finished difference Result 16463 states and 48777 transitions. [2021-06-05 15:27:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 15:27:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:32,638 INFO L225 Difference]: With dead ends: 16463 [2021-06-05 15:27:32,639 INFO L226 Difference]: Without dead ends: 16129 [2021-06-05 15:27:32,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3865.4ms TimeCoverageRelationStatistics Valid=1158, Invalid=10614, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 15:27:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16129 states. [2021-06-05 15:27:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16129 to 8079. [2021-06-05 15:27:32,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 3.0300817033919287) internal successors, (24477), 8078 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 24477 transitions. [2021-06-05 15:27:32,837 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 24477 transitions. Word has length 37 [2021-06-05 15:27:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:32,837 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 24477 transitions. [2021-06-05 15:27:32,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 24477 transitions. [2021-06-05 15:27:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:32,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:32,846 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:33,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:27:33,049 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:33,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash 146836776, now seen corresponding path program 71 times [2021-06-05 15:27:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:33,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731677547] [2021-06-05 15:27:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:33,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731677547] [2021-06-05 15:27:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731677547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819891692] [2021-06-05 15:27:33,470 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:33,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:27:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:27:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:33,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:33,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:27:33,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:33,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:33,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:33,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 15:27:33,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:33,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:33,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:33,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:33,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:27:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:33,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819891692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:33,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:33,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 15:27:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636378022] [2021-06-05 15:27:33,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:27:33,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:33,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:27:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:27:33,969 INFO L87 Difference]: Start difference. First operand 8079 states and 24477 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:37,752 INFO L93 Difference]: Finished difference Result 13022 states and 39095 transitions. [2021-06-05 15:27:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:27:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:37,775 INFO L225 Difference]: With dead ends: 13022 [2021-06-05 15:27:37,775 INFO L226 Difference]: Without dead ends: 12649 [2021-06-05 15:27:37,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2491.2ms TimeCoverageRelationStatistics Valid=486, Invalid=6486, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:27:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12649 states. [2021-06-05 15:27:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12649 to 8061. [2021-06-05 15:27:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8061 states, 8060 states have (on average 3.036848635235732) internal successors, (24477), 8060 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 24477 transitions. [2021-06-05 15:27:37,913 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 24477 transitions. Word has length 37 [2021-06-05 15:27:37,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:37,914 INFO L482 AbstractCegarLoop]: Abstraction has 8061 states and 24477 transitions. [2021-06-05 15:27:37,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:37,914 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 24477 transitions. [2021-06-05 15:27:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:37,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:37,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:38,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:38,123 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1505232886, now seen corresponding path program 72 times [2021-06-05 15:27:38,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:38,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256313742] [2021-06-05 15:27:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:38,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256313742] [2021-06-05 15:27:38,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256313742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115180272] [2021-06-05 15:27:38,512 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:38,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:27:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:38,871 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:38,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:27:38,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:38,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:38,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:38,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 15:27:38,950 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:38,950 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 43 treesize of output 23 [2021-06-05 15:27:38,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:38,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:38,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:38,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:27:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:39,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115180272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:39,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:39,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 15:27:39,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863979879] [2021-06-05 15:27:39,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:27:39,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:39,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:27:39,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:27:39,103 INFO L87 Difference]: Start difference. First operand 8061 states and 24477 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:42,289 INFO L93 Difference]: Finished difference Result 15666 states and 46528 transitions. [2021-06-05 15:27:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:27:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:42,306 INFO L225 Difference]: With dead ends: 15666 [2021-06-05 15:27:42,307 INFO L226 Difference]: Without dead ends: 15353 [2021-06-05 15:27:42,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2726.9ms TimeCoverageRelationStatistics Valid=717, Invalid=6423, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:27:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15353 states. [2021-06-05 15:27:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15353 to 8111. [2021-06-05 15:27:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8111 states, 8110 states have (on average 3.0355117139334156) internal successors, (24618), 8110 states have internal predecessors, (24618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 24618 transitions. [2021-06-05 15:27:42,437 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 24618 transitions. Word has length 37 [2021-06-05 15:27:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:42,437 INFO L482 AbstractCegarLoop]: Abstraction has 8111 states and 24618 transitions. [2021-06-05 15:27:42,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 24618 transitions. [2021-06-05 15:27:42,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:42,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:42,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:42,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:42,661 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 594236954, now seen corresponding path program 73 times [2021-06-05 15:27:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:42,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403187928] [2021-06-05 15:27:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:42,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:43,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403187928] [2021-06-05 15:27:43,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403187928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:43,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885666942] [2021-06-05 15:27:43,004 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:27:43,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:43,232 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:43,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:27:43,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:43,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:43,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:43,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:27:43,402 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:43,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:43,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:43,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:43,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:43,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885666942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:43,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:43,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:43,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801774871] [2021-06-05 15:27:43,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:43,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:43,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:43,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:43,588 INFO L87 Difference]: Start difference. First operand 8111 states and 24618 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:48,100 INFO L93 Difference]: Finished difference Result 16437 states and 48919 transitions. [2021-06-05 15:27:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:27:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:48,124 INFO L225 Difference]: With dead ends: 16437 [2021-06-05 15:27:48,124 INFO L226 Difference]: Without dead ends: 16158 [2021-06-05 15:27:48,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3711.9ms TimeCoverageRelationStatistics Valid=1041, Invalid=9671, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 15:27:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-06-05 15:27:48,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 8329. [2021-06-05 15:27:48,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0345821325648417) internal successors, (25272), 8328 states have internal predecessors, (25272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25272 transitions. [2021-06-05 15:27:48,297 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25272 transitions. Word has length 37 [2021-06-05 15:27:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:48,298 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25272 transitions. [2021-06-05 15:27:48,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25272 transitions. [2021-06-05 15:27:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:48,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:48,307 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:48,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 15:27:48,507 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:48,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2004424102, now seen corresponding path program 74 times [2021-06-05 15:27:48,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:48,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672775484] [2021-06-05 15:27:48,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:48,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672775484] [2021-06-05 15:27:48,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672775484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297132553] [2021-06-05 15:27:48,871 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:48,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:27:48,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:27:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:49,116 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:49,116 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 27 treesize of output 15 [2021-06-05 15:27:49,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:49,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:49,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:49,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:49,297 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:49,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:27:49,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:49,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:49,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:49,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:27:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:49,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297132553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:49,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:49,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:49,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323696547] [2021-06-05 15:27:49,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:49,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:49,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:49,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:49,511 INFO L87 Difference]: Start difference. First operand 8329 states and 25272 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:54,245 INFO L93 Difference]: Finished difference Result 12304 states and 36865 transitions. [2021-06-05 15:27:54,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:27:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:54,261 INFO L225 Difference]: With dead ends: 12304 [2021-06-05 15:27:54,261 INFO L226 Difference]: Without dead ends: 12020 [2021-06-05 15:27:54,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3399.1ms TimeCoverageRelationStatistics Valid=597, Invalid=8523, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 15:27:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-06-05 15:27:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 8329. [2021-06-05 15:27:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0355427473583094) internal successors, (25280), 8328 states have internal predecessors, (25280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:54,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25280 transitions. [2021-06-05 15:27:54,381 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25280 transitions. Word has length 37 [2021-06-05 15:27:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:54,381 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25280 transitions. [2021-06-05 15:27:54,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25280 transitions. [2021-06-05 15:27:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:27:54,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:54,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:54,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:27:54,591 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:54,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:54,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1469667314, now seen corresponding path program 75 times [2021-06-05 15:27:54,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:54,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626315795] [2021-06-05 15:27:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:54,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626315795] [2021-06-05 15:27:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626315795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494876092] [2021-06-05 15:27:54,965 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:54,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:27:54,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:54,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:55,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:55,257 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 27 treesize of output 15 [2021-06-05 15:27:55,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:55,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:55,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:55,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:27:55,458 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:27:55,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 15:27:55,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:27:55,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:27:55,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:27:55,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:27:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:55,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494876092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:55,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:55,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:27:55,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2602922] [2021-06-05 15:27:55,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:27:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:55,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:27:55,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:27:55,658 INFO L87 Difference]: Start difference. First operand 8329 states and 25280 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:59,975 INFO L93 Difference]: Finished difference Result 13628 states and 40763 transitions. [2021-06-05 15:27:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:27:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:27:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:59,994 INFO L225 Difference]: With dead ends: 13628 [2021-06-05 15:27:59,994 INFO L226 Difference]: Without dead ends: 13372 [2021-06-05 15:27:59,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 3246.7ms TimeCoverageRelationStatistics Valid=515, Invalid=7857, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:28:00,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-06-05 15:28:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 8322. [2021-06-05 15:28:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 8321 states have (on average 3.0348515803389016) internal successors, (25253), 8321 states have internal predecessors, (25253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 25253 transitions. [2021-06-05 15:28:00,121 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 25253 transitions. Word has length 37 [2021-06-05 15:28:00,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:00,121 INFO L482 AbstractCegarLoop]: Abstraction has 8322 states and 25253 transitions. [2021-06-05 15:28:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 25253 transitions. [2021-06-05 15:28:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:00,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:00,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:00,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:00,331 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:00,331 INFO L82 PathProgramCache]: Analyzing trace with hash 644586826, now seen corresponding path program 76 times [2021-06-05 15:28:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:00,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721138947] [2021-06-05 15:28:00,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:00,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:00,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721138947] [2021-06-05 15:28:00,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721138947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:00,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593258777] [2021-06-05 15:28:00,708 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:00,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:28:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:00,959 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:00,959 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 27 treesize of output 15 [2021-06-05 15:28:00,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:00,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:00,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:00,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:28:01,206 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:01,206 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 30 treesize of output 18 [2021-06-05 15:28:01,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:01,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:01,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:01,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:28:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:01,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593258777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:01,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:01,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578192180] [2021-06-05 15:28:01,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:01,380 INFO L87 Difference]: Start difference. First operand 8322 states and 25253 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:05,401 INFO L93 Difference]: Finished difference Result 13843 states and 41442 transitions. [2021-06-05 15:28:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:28:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:05,421 INFO L225 Difference]: With dead ends: 13843 [2021-06-05 15:28:05,421 INFO L226 Difference]: Without dead ends: 13564 [2021-06-05 15:28:05,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2952.3ms TimeCoverageRelationStatistics Valid=440, Invalid=6870, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:28:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13564 states. [2021-06-05 15:28:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13564 to 8332. [2021-06-05 15:28:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.035770015604369) internal successors, (25291), 8331 states have internal predecessors, (25291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25291 transitions. [2021-06-05 15:28:05,555 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25291 transitions. Word has length 37 [2021-06-05 15:28:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:05,555 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25291 transitions. [2021-06-05 15:28:05,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25291 transitions. [2021-06-05 15:28:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:05,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:05,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:05,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 15:28:05,765 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:05,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1790118686, now seen corresponding path program 77 times [2021-06-05 15:28:05,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:05,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372996932] [2021-06-05 15:28:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:06,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:06,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372996932] [2021-06-05 15:28:06,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372996932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:06,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217102892] [2021-06-05 15:28:06,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:06,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:28:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:28:06,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:06,397 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:06,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:28:06,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:06,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:06,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:06,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:28:06,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:06,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:06,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:06,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:06,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:06,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:06,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217102892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:06,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:06,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:06,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663412067] [2021-06-05 15:28:06,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:06,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:06,842 INFO L87 Difference]: Start difference. First operand 8332 states and 25291 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:11,005 INFO L93 Difference]: Finished difference Result 13716 states and 41060 transitions. [2021-06-05 15:28:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:28:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:11,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:11,023 INFO L225 Difference]: With dead ends: 13716 [2021-06-05 15:28:11,024 INFO L226 Difference]: Without dead ends: 13460 [2021-06-05 15:28:11,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2989.3ms TimeCoverageRelationStatistics Valid=470, Invalid=7186, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 15:28:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13460 states. [2021-06-05 15:28:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13460 to 8320. [2021-06-05 15:28:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8320 states, 8319 states have (on average 3.0360620266858995) internal successors, (25257), 8319 states have internal predecessors, (25257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8320 states to 8320 states and 25257 transitions. [2021-06-05 15:28:11,154 INFO L78 Accepts]: Start accepts. Automaton has 8320 states and 25257 transitions. Word has length 37 [2021-06-05 15:28:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:11,154 INFO L482 AbstractCegarLoop]: Abstraction has 8320 states and 25257 transitions. [2021-06-05 15:28:11,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 8320 states and 25257 transitions. [2021-06-05 15:28:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:11,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:11,163 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:11,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:11,363 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash -390594470, now seen corresponding path program 78 times [2021-06-05 15:28:11,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:11,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91199222] [2021-06-05 15:28:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:11,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:11,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91199222] [2021-06-05 15:28:11,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91199222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:11,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185417524] [2021-06-05 15:28:11,841 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:11,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:28:11,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:28:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:12,160 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:12,161 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 27 treesize of output 15 [2021-06-05 15:28:12,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:12,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:12,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:12,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:28:12,408 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:12,409 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 39 treesize of output 23 [2021-06-05 15:28:12,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:12,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:12,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:12,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:23 [2021-06-05 15:28:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:12,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185417524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:12,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:12,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:12,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677229006] [2021-06-05 15:28:12,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:12,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:12,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:12,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:12,572 INFO L87 Difference]: Start difference. First operand 8320 states and 25257 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:16,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:16,927 INFO L93 Difference]: Finished difference Result 14169 states and 42466 transitions. [2021-06-05 15:28:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:28:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:16,946 INFO L225 Difference]: With dead ends: 14169 [2021-06-05 15:28:16,947 INFO L226 Difference]: Without dead ends: 13893 [2021-06-05 15:28:16,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 3092.9ms TimeCoverageRelationStatistics Valid=433, Invalid=6877, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:28:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13893 states. [2021-06-05 15:28:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13893 to 8338. [2021-06-05 15:28:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 3.0361041141897567) internal successors, (25312), 8337 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 25312 transitions. [2021-06-05 15:28:17,079 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 25312 transitions. Word has length 37 [2021-06-05 15:28:17,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 25312 transitions. [2021-06-05 15:28:17,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 25312 transitions. [2021-06-05 15:28:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:17,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:17,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:17,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:17,289 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:17,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:17,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1597465620, now seen corresponding path program 79 times [2021-06-05 15:28:17,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:17,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069088095] [2021-06-05 15:28:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:17,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:17,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069088095] [2021-06-05 15:28:17,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069088095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:17,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483478592] [2021-06-05 15:28:17,660 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:17,911 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:17,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:28:17,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:17,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:17,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:17,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:28:18,187 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:18,187 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 30 treesize of output 18 [2021-06-05 15:28:18,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:18,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:18,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:18,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:28:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:18,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483478592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:18,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:18,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:18,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872455158] [2021-06-05 15:28:18,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:18,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:18,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:18,373 INFO L87 Difference]: Start difference. First operand 8338 states and 25312 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:22,163 INFO L93 Difference]: Finished difference Result 13483 states and 40301 transitions. [2021-06-05 15:28:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:28:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:22,180 INFO L225 Difference]: With dead ends: 13483 [2021-06-05 15:28:22,180 INFO L226 Difference]: Without dead ends: 13191 [2021-06-05 15:28:22,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2749.3ms TimeCoverageRelationStatistics Valid=403, Invalid=6239, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:28:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2021-06-05 15:28:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 8332. [2021-06-05 15:28:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.0367302844796544) internal successors, (25299), 8331 states have internal predecessors, (25299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25299 transitions. [2021-06-05 15:28:22,302 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25299 transitions. Word has length 37 [2021-06-05 15:28:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:22,302 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25299 transitions. [2021-06-05 15:28:22,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25299 transitions. [2021-06-05 15:28:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:22,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:22,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:22,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 15:28:22,512 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1947653718, now seen corresponding path program 80 times [2021-06-05 15:28:22,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:22,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804248227] [2021-06-05 15:28:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:22,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:22,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804248227] [2021-06-05 15:28:22,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804248227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:22,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903893818] [2021-06-05 15:28:22,857 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:22,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:22,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:22,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:23,090 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:23,091 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 27 treesize of output 15 [2021-06-05 15:28:23,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:23,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:23,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:23,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:28:23,273 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:23,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:23,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:23,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:23,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:23,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:23,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903893818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:23,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:23,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:23,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611925859] [2021-06-05 15:28:23,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:23,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:23,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:23,466 INFO L87 Difference]: Start difference. First operand 8332 states and 25299 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:27,339 INFO L93 Difference]: Finished difference Result 16854 states and 50179 transitions. [2021-06-05 15:28:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:28:27,339 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:27,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:27,364 INFO L225 Difference]: With dead ends: 16854 [2021-06-05 15:28:27,364 INFO L226 Difference]: Without dead ends: 16575 [2021-06-05 15:28:27,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3196.6ms TimeCoverageRelationStatistics Valid=784, Invalid=8146, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 15:28:27,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-06-05 15:28:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 8446. [2021-06-05 15:28:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 3.0351687388987565) internal successors, (25632), 8445 states have internal predecessors, (25632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 25632 transitions. [2021-06-05 15:28:27,516 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 25632 transitions. Word has length 37 [2021-06-05 15:28:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:27,516 INFO L482 AbstractCegarLoop]: Abstraction has 8446 states and 25632 transitions. [2021-06-05 15:28:27,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 25632 transitions. [2021-06-05 15:28:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:27,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:27,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:27,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:28:27,727 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -651007338, now seen corresponding path program 81 times [2021-06-05 15:28:27,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101838971] [2021-06-05 15:28:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:28,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:28,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101838971] [2021-06-05 15:28:28,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101838971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:28,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577044618] [2021-06-05 15:28:28,079 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:28,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:28:28,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:28,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:28:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:28,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:28,333 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 27 treesize of output 15 [2021-06-05 15:28:28,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:28,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:28,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:28,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:28:28,533 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:28,533 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 36 treesize of output 20 [2021-06-05 15:28:28,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:28,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:28,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:28,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 15:28:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:28,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577044618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:28,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:28,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049593076] [2021-06-05 15:28:28,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:28,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:28,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:28,744 INFO L87 Difference]: Start difference. First operand 8446 states and 25632 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:31,497 INFO L93 Difference]: Finished difference Result 11633 states and 34886 transitions. [2021-06-05 15:28:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:28:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:31,512 INFO L225 Difference]: With dead ends: 11633 [2021-06-05 15:28:31,513 INFO L226 Difference]: Without dead ends: 11318 [2021-06-05 15:28:31,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2052.7ms TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:28:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11318 states. [2021-06-05 15:28:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11318 to 8409. [2021-06-05 15:28:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 8408 states have (on average 3.0388915318744054) internal successors, (25551), 8408 states have internal predecessors, (25551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 25551 transitions. [2021-06-05 15:28:31,627 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 25551 transitions. Word has length 37 [2021-06-05 15:28:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:31,627 INFO L482 AbstractCegarLoop]: Abstraction has 8409 states and 25551 transitions. [2021-06-05 15:28:31,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 25551 transitions. [2021-06-05 15:28:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:31,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:31,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:31,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:31,836 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:31,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:31,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2113893768, now seen corresponding path program 82 times [2021-06-05 15:28:31,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:31,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663573721] [2021-06-05 15:28:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:32,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:32,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663573721] [2021-06-05 15:28:32,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663573721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:32,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324221477] [2021-06-05 15:28:32,196 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:32,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:28:32,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:32,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:32,576 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:32,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:28:32,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:32,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:32,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:32,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:28:32,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:32,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:32,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:32,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:32,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:32,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:32,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324221477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:32,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:32,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 15:28:32,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958317037] [2021-06-05 15:28:32,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:28:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:28:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:28:32,861 INFO L87 Difference]: Start difference. First operand 8409 states and 25551 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:36,319 INFO L93 Difference]: Finished difference Result 13168 states and 39076 transitions. [2021-06-05 15:28:36,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:28:36,320 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:36,338 INFO L225 Difference]: With dead ends: 13168 [2021-06-05 15:28:36,338 INFO L226 Difference]: Without dead ends: 12986 [2021-06-05 15:28:36,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2999.2ms TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:28:36,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12986 states. [2021-06-05 15:28:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12986 to 8519. [2021-06-05 15:28:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8519 states, 8518 states have (on average 3.0319323784926038) internal successors, (25826), 8518 states have internal predecessors, (25826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:36,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8519 states to 8519 states and 25826 transitions. [2021-06-05 15:28:36,464 INFO L78 Accepts]: Start accepts. Automaton has 8519 states and 25826 transitions. Word has length 37 [2021-06-05 15:28:36,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:36,464 INFO L482 AbstractCegarLoop]: Abstraction has 8519 states and 25826 transitions. [2021-06-05 15:28:36,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8519 states and 25826 transitions. [2021-06-05 15:28:36,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:36,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:36,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:36,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:36,673 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:36,674 INFO L82 PathProgramCache]: Analyzing trace with hash -417587528, now seen corresponding path program 83 times [2021-06-05 15:28:36,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:36,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940816603] [2021-06-05 15:28:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:37,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940816603] [2021-06-05 15:28:37,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940816603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94982220] [2021-06-05 15:28:37,066 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:37,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:28:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:28:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:37,346 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:37,346 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 33 treesize of output 21 [2021-06-05 15:28:37,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:37,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:37,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:37,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:41 [2021-06-05 15:28:37,416 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:28:37,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:37,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:37,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:37,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 15:28:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:37,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94982220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:37,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:37,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2021-06-05 15:28:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130181773] [2021-06-05 15:28:37,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:28:37,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:37,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:28:37,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:28:37,552 INFO L87 Difference]: Start difference. First operand 8519 states and 25826 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:38,343 INFO L93 Difference]: Finished difference Result 8965 states and 27063 transitions. [2021-06-05 15:28:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:28:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:38,355 INFO L225 Difference]: With dead ends: 8965 [2021-06-05 15:28:38,355 INFO L226 Difference]: Without dead ends: 8764 [2021-06-05 15:28:38,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 936.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:28:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-06-05 15:28:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8450. [2021-06-05 15:28:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 3.037045804237188) internal successors, (25660), 8449 states have internal predecessors, (25660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:38,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 25660 transitions. [2021-06-05 15:28:38,452 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 25660 transitions. Word has length 37 [2021-06-05 15:28:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:38,452 INFO L482 AbstractCegarLoop]: Abstraction has 8450 states and 25660 transitions. [2021-06-05 15:28:38,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 25660 transitions. [2021-06-05 15:28:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:38,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:38,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:38,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:38,661 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:38,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1630842670, now seen corresponding path program 84 times [2021-06-05 15:28:38,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:38,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391373601] [2021-06-05 15:28:38,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:39,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391373601] [2021-06-05 15:28:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391373601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828829524] [2021-06-05 15:28:39,008 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:39,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:28:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:28:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:28:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:28:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:28:39,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:39,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:39,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:39,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:28 [2021-06-05 15:28:39,419 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:39,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:39,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:39,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:39,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:39,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:28:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828829524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:39,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:39,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:28:39,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558494263] [2021-06-05 15:28:39,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:28:39,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:28:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:28:39,574 INFO L87 Difference]: Start difference. First operand 8450 states and 25660 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:42,182 INFO L93 Difference]: Finished difference Result 13844 states and 40921 transitions. [2021-06-05 15:28:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:28:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:42,201 INFO L225 Difference]: With dead ends: 13844 [2021-06-05 15:28:42,201 INFO L226 Difference]: Without dead ends: 13638 [2021-06-05 15:28:42,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2206.2ms TimeCoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:28:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13638 states. [2021-06-05 15:28:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13638 to 8552. [2021-06-05 15:28:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8551 states have (on average 3.0321599812887383) internal successors, (25928), 8551 states have internal predecessors, (25928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 25928 transitions. [2021-06-05 15:28:42,331 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 25928 transitions. Word has length 37 [2021-06-05 15:28:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:42,331 INFO L482 AbstractCegarLoop]: Abstraction has 8552 states and 25928 transitions. [2021-06-05 15:28:42,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:42,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 25928 transitions. [2021-06-05 15:28:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:42,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:42,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:42,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:42,545 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash -967818386, now seen corresponding path program 85 times [2021-06-05 15:28:42,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:42,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761059031] [2021-06-05 15:28:42,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:42,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:42,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761059031] [2021-06-05 15:28:42,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761059031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:42,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516449659] [2021-06-05 15:28:42,875 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:43,239 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:43,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:28:43,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:43,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:43,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:43,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:28:43,325 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:43,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:43,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:43,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:43,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516449659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:43,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:43,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 15:28:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200276124] [2021-06-05 15:28:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:28:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:28:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:28:43,548 INFO L87 Difference]: Start difference. First operand 8552 states and 25928 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:45,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:45,983 INFO L93 Difference]: Finished difference Result 9940 states and 29928 transitions. [2021-06-05 15:28:45,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:28:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:45,996 INFO L225 Difference]: With dead ends: 9940 [2021-06-05 15:28:45,996 INFO L226 Difference]: Without dead ends: 9708 [2021-06-05 15:28:45,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1776.0ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:28:46,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2021-06-05 15:28:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 8492. [2021-06-05 15:28:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.035802614533035) internal successors, (25777), 8491 states have internal predecessors, (25777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 25777 transitions. [2021-06-05 15:28:46,102 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 25777 transitions. Word has length 37 [2021-06-05 15:28:46,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:46,102 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 25777 transitions. [2021-06-05 15:28:46,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 25777 transitions. [2021-06-05 15:28:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:46,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:46,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:46,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:46,312 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1202081642, now seen corresponding path program 86 times [2021-06-05 15:28:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:46,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363616133] [2021-06-05 15:28:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:46,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363616133] [2021-06-05 15:28:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363616133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:46,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759579239] [2021-06-05 15:28:46,672 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:46,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:46,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:28:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:46,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:46,927 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 27 treesize of output 15 [2021-06-05 15:28:46,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:46,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:46,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:46,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:28:47,121 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:47,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:47,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:47,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:47,129 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:47,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759579239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:47,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:47,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:47,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167850137] [2021-06-05 15:28:47,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:47,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:47,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:47,327 INFO L87 Difference]: Start difference. First operand 8492 states and 25777 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:51,732 INFO L93 Difference]: Finished difference Result 15143 states and 44874 transitions. [2021-06-05 15:28:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:28:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:51,751 INFO L225 Difference]: With dead ends: 15143 [2021-06-05 15:28:51,751 INFO L226 Difference]: Without dead ends: 14864 [2021-06-05 15:28:51,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 3297.2ms TimeCoverageRelationStatistics Valid=751, Invalid=7991, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:28:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14864 states. [2021-06-05 15:28:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14864 to 8576. [2021-06-05 15:28:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 8575 states have (on average 3.033586005830904) internal successors, (26013), 8575 states have internal predecessors, (26013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 26013 transitions. [2021-06-05 15:28:51,880 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 26013 transitions. Word has length 37 [2021-06-05 15:28:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:51,881 INFO L482 AbstractCegarLoop]: Abstraction has 8576 states and 26013 transitions. [2021-06-05 15:28:51,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:51,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 26013 transitions. [2021-06-05 15:28:51,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:51,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:51,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:52,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:28:52,091 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:52,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:52,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1396579414, now seen corresponding path program 87 times [2021-06-05 15:28:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:52,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535657798] [2021-06-05 15:28:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:52,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:52,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535657798] [2021-06-05 15:28:52,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535657798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:52,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927203194] [2021-06-05 15:28:52,545 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:52,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:28:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:28:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:52,852 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:52,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:28:52,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:52,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:52,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:52,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:28:53,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:53,058 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 43 treesize of output 23 [2021-06-05 15:28:53,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:53,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:53,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:28:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:53,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927203194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:53,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:53,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108802021] [2021-06-05 15:28:53,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:53,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:53,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:53,281 INFO L87 Difference]: Start difference. First operand 8576 states and 26013 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:55,765 INFO L93 Difference]: Finished difference Result 9895 states and 29814 transitions. [2021-06-05 15:28:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:28:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:28:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:55,777 INFO L225 Difference]: With dead ends: 9895 [2021-06-05 15:28:55,778 INFO L226 Difference]: Without dead ends: 9666 [2021-06-05 15:28:55,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1876.4ms TimeCoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:28:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-05 15:28:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8549. [2021-06-05 15:28:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 3.0354468881609735) internal successors, (25947), 8548 states have internal predecessors, (25947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 25947 transitions. [2021-06-05 15:28:55,882 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 25947 transitions. Word has length 37 [2021-06-05 15:28:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:55,883 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 25947 transitions. [2021-06-05 15:28:55,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 25947 transitions. [2021-06-05 15:28:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:28:55,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:55,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:56,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 15:28:56,093 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1739468890, now seen corresponding path program 88 times [2021-06-05 15:28:56,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:56,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432019738] [2021-06-05 15:28:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:56,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:56,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432019738] [2021-06-05 15:28:56,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432019738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:56,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595239029] [2021-06-05 15:28:56,432 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:56,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:28:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:28:56,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:56,696 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:28:56,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:28:56,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:56,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:56,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:56,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 15:28:56,899 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:28:56,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:28:56,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:28:56,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:28:56,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:28:56,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:28:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595239029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:57,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:57,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:28:57,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058305126] [2021-06-05 15:28:57,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:28:57,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:57,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:28:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:28:57,113 INFO L87 Difference]: Start difference. First operand 8549 states and 25947 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:00,667 INFO L93 Difference]: Finished difference Result 12814 states and 38064 transitions. [2021-06-05 15:29:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:29:00,668 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:00,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:00,685 INFO L225 Difference]: With dead ends: 12814 [2021-06-05 15:29:00,685 INFO L226 Difference]: Without dead ends: 12632 [2021-06-05 15:29:00,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2726.7ms TimeCoverageRelationStatistics Valid=539, Invalid=6103, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:29:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12632 states. [2021-06-05 15:29:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12632 to 8624. [2021-06-05 15:29:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.0339788936565) internal successors, (26162), 8623 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 26162 transitions. [2021-06-05 15:29:00,812 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 26162 transitions. Word has length 37 [2021-06-05 15:29:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 26162 transitions. [2021-06-05 15:29:00,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 26162 transitions. [2021-06-05 15:29:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:00,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:00,822 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:01,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:01,022 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash -43162650, now seen corresponding path program 89 times [2021-06-05 15:29:01,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:01,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234370109] [2021-06-05 15:29:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:01,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234370109] [2021-06-05 15:29:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234370109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865381251] [2021-06-05 15:29:01,365 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:01,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:29:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:29:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:01,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:01,628 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 38 treesize of output 22 [2021-06-05 15:29:01,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:01,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:01,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:01,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-05 15:29:01,740 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:01,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:01,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:01,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:01,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:01,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 15:29:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865381251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:01,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:01,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:29:01,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234232698] [2021-06-05 15:29:01,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:29:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:29:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:01,924 INFO L87 Difference]: Start difference. First operand 8624 states and 26162 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:03,731 INFO L93 Difference]: Finished difference Result 10198 states and 30751 transitions. [2021-06-05 15:29:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:29:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:03,744 INFO L225 Difference]: With dead ends: 10198 [2021-06-05 15:29:03,744 INFO L226 Difference]: Without dead ends: 9953 [2021-06-05 15:29:03,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1314.3ms TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:29:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-05 15:29:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8534. [2021-06-05 15:29:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 3.0375014649009726) internal successors, (25919), 8533 states have internal predecessors, (25919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 25919 transitions. [2021-06-05 15:29:03,848 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 25919 transitions. Word has length 37 [2021-06-05 15:29:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:03,849 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 25919 transitions. [2021-06-05 15:29:03,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 25919 transitions. [2021-06-05 15:29:03,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:03,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:03,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:04,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:04,061 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 739816670, now seen corresponding path program 90 times [2021-06-05 15:29:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:04,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467596288] [2021-06-05 15:29:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:04,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467596288] [2021-06-05 15:29:04,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467596288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:04,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713731729] [2021-06-05 15:29:04,455 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:04,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:29:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:04,740 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:29:04,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:04,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:04,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:04,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 15:29:04,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:04,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:04,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:04,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:04,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:04,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:29:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:04,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713731729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:04,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:04,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2021-06-05 15:29:04,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24558636] [2021-06-05 15:29:04,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:29:04,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:29:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:04,904 INFO L87 Difference]: Start difference. First operand 8534 states and 25919 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:06,823 INFO L93 Difference]: Finished difference Result 12951 states and 38342 transitions. [2021-06-05 15:29:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:29:06,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:06,841 INFO L225 Difference]: With dead ends: 12951 [2021-06-05 15:29:06,841 INFO L226 Difference]: Without dead ends: 12674 [2021-06-05 15:29:06,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1837.5ms TimeCoverageRelationStatistics Valid=500, Invalid=4330, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:29:06,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12674 states. [2021-06-05 15:29:06,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12674 to 8696. [2021-06-05 15:29:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 8695 states have (on average 3.0357676825761932) internal successors, (26396), 8695 states have internal predecessors, (26396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 26396 transitions. [2021-06-05 15:29:06,966 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 26396 transitions. Word has length 37 [2021-06-05 15:29:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:06,966 INFO L482 AbstractCegarLoop]: Abstraction has 8696 states and 26396 transitions. [2021-06-05 15:29:06,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 26396 transitions. [2021-06-05 15:29:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:06,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:06,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:07,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:07,177 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 311055642, now seen corresponding path program 91 times [2021-06-05 15:29:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:07,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413119718] [2021-06-05 15:29:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:07,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413119718] [2021-06-05 15:29:07,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413119718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:07,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248521980] [2021-06-05 15:29:07,572 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:07,840 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:29:07,840 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 29 treesize of output 13 [2021-06-05 15:29:07,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:07,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:07,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:07,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:29:08,043 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:08,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:08,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:08,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:08,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:08,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:08,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248521980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:08,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849652577] [2021-06-05 15:29:08,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:08,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:08,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:08,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:08,241 INFO L87 Difference]: Start difference. First operand 8696 states and 26396 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:12,018 INFO L93 Difference]: Finished difference Result 13049 states and 38753 transitions. [2021-06-05 15:29:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:29:12,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:12,036 INFO L225 Difference]: With dead ends: 13049 [2021-06-05 15:29:12,036 INFO L226 Difference]: Without dead ends: 12867 [2021-06-05 15:29:12,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2727.0ms TimeCoverageRelationStatistics Valid=664, Invalid=6476, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:29:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12867 states. [2021-06-05 15:29:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12867 to 8774. [2021-06-05 15:29:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8774 states, 8773 states have (on average 3.033853869827881) internal successors, (26616), 8773 states have internal predecessors, (26616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8774 states to 8774 states and 26616 transitions. [2021-06-05 15:29:12,164 INFO L78 Accepts]: Start accepts. Automaton has 8774 states and 26616 transitions. Word has length 37 [2021-06-05 15:29:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:12,164 INFO L482 AbstractCegarLoop]: Abstraction has 8774 states and 26616 transitions. [2021-06-05 15:29:12,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 8774 states and 26616 transitions. [2021-06-05 15:29:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:12,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:12,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:12,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:12,374 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:12,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2007361882, now seen corresponding path program 92 times [2021-06-05 15:29:12,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:12,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540150880] [2021-06-05 15:29:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:12,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540150880] [2021-06-05 15:29:12,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540150880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989374239] [2021-06-05 15:29:12,737 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:12,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:12,994 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 15:29:12,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:13,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:13,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:13,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:33 [2021-06-05 15:29:13,104 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:13,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 15:29:13,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:13,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:13,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:13,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 15:29:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:13,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989374239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:13,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:13,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:29:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863548090] [2021-06-05 15:29:13,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:29:13,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:13,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:29:13,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:13,291 INFO L87 Difference]: Start difference. First operand 8774 states and 26616 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:15,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:15,162 INFO L93 Difference]: Finished difference Result 10209 states and 30738 transitions. [2021-06-05 15:29:15,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:29:15,163 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:15,176 INFO L225 Difference]: With dead ends: 10209 [2021-06-05 15:29:15,176 INFO L226 Difference]: Without dead ends: 9998 [2021-06-05 15:29:15,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:29:15,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2021-06-05 15:29:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 8843. [2021-06-05 15:29:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8842 states have (on average 3.033476589007012) internal successors, (26822), 8842 states have internal predecessors, (26822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:15,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 26822 transitions. [2021-06-05 15:29:15,289 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 26822 transitions. Word has length 37 [2021-06-05 15:29:15,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:15,289 INFO L482 AbstractCegarLoop]: Abstraction has 8843 states and 26822 transitions. [2021-06-05 15:29:15,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 26822 transitions. [2021-06-05 15:29:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:15,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:15,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:15,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 15:29:15,499 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:15,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1433308364, now seen corresponding path program 93 times [2021-06-05 15:29:15,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:15,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642902043] [2021-06-05 15:29:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:15,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642902043] [2021-06-05 15:29:15,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642902043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:15,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551863401] [2021-06-05 15:29:15,885 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:15,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:29:15,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:15,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:29:15,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:16,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:16,147 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 27 treesize of output 15 [2021-06-05 15:29:16,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:16,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:29:16,354 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:16,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:16,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:16,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:16,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551863401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:16,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:16,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:16,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759653117] [2021-06-05 15:29:16,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:16,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:16,561 INFO L87 Difference]: Start difference. First operand 8843 states and 26822 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:20,295 INFO L93 Difference]: Finished difference Result 13498 states and 40126 transitions. [2021-06-05 15:29:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:29:20,296 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:20,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:20,315 INFO L225 Difference]: With dead ends: 13498 [2021-06-05 15:29:20,315 INFO L226 Difference]: Without dead ends: 13328 [2021-06-05 15:29:20,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2862.8ms TimeCoverageRelationStatistics Valid=650, Invalid=6660, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:29:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2021-06-05 15:29:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 8822. [2021-06-05 15:29:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.033556286135359) internal successors, (26759), 8821 states have internal predecessors, (26759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 26759 transitions. [2021-06-05 15:29:20,453 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 26759 transitions. Word has length 37 [2021-06-05 15:29:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:20,453 INFO L482 AbstractCegarLoop]: Abstraction has 8822 states and 26759 transitions. [2021-06-05 15:29:20,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 26759 transitions. [2021-06-05 15:29:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:20,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:20,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:20,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 15:29:20,663 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:20,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:20,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1826477636, now seen corresponding path program 94 times [2021-06-05 15:29:20,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:20,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404937646] [2021-06-05 15:29:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:21,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:21,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:21,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404937646] [2021-06-05 15:29:21,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404937646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:21,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578189941] [2021-06-05 15:29:21,040 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:21,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:21,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:21,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:21,302 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:29:21,302 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 [2021-06-05 15:29:21,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:21,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:21,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:21,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 15:29:21,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:21,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:21,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:21,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:21,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:21,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578189941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:21,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:21,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085087485] [2021-06-05 15:29:21,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:21,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:21,748 INFO L87 Difference]: Start difference. First operand 8822 states and 26759 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:25,171 INFO L93 Difference]: Finished difference Result 13664 states and 40658 transitions. [2021-06-05 15:29:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:29:25,171 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:25,191 INFO L225 Difference]: With dead ends: 13664 [2021-06-05 15:29:25,192 INFO L226 Difference]: Without dead ends: 13491 [2021-06-05 15:29:25,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2613.5ms TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:29:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13491 states. [2021-06-05 15:29:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13491 to 8717. [2021-06-05 15:29:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8717 states, 8716 states have (on average 3.0353373106929786) internal successors, (26456), 8716 states have internal predecessors, (26456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 26456 transitions. [2021-06-05 15:29:25,365 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 26456 transitions. Word has length 37 [2021-06-05 15:29:25,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:25,365 INFO L482 AbstractCegarLoop]: Abstraction has 8717 states and 26456 transitions. [2021-06-05 15:29:25,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 26456 transitions. [2021-06-05 15:29:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:25,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:25,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:25,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:25,576 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1664472406, now seen corresponding path program 95 times [2021-06-05 15:29:25,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:25,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995501115] [2021-06-05 15:29:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:25,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995501115] [2021-06-05 15:29:25,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995501115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122976310] [2021-06-05 15:29:25,952 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:25,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:29:25,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:25,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:29:25,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:26,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:29:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:29:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:29:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:26,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:26,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:26,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:26,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 15:29:26,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:26,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:26,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:26,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:26,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:26,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122976310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:26,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:26,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:26,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340923400] [2021-06-05 15:29:26,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:26,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:26,795 INFO L87 Difference]: Start difference. First operand 8717 states and 26456 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:30,401 INFO L93 Difference]: Finished difference Result 13319 states and 39727 transitions. [2021-06-05 15:29:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:29:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:30,419 INFO L225 Difference]: With dead ends: 13319 [2021-06-05 15:29:30,419 INFO L226 Difference]: Without dead ends: 13137 [2021-06-05 15:29:30,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 2654.2ms TimeCoverageRelationStatistics Valid=536, Invalid=6106, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:29:30,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2021-06-05 15:29:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 8772. [2021-06-05 15:29:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.033405540987345) internal successors, (26606), 8771 states have internal predecessors, (26606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 26606 transitions. [2021-06-05 15:29:30,547 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 26606 transitions. Word has length 37 [2021-06-05 15:29:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:30,547 INFO L482 AbstractCegarLoop]: Abstraction has 8772 states and 26606 transitions. [2021-06-05 15:29:30,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 26606 transitions. [2021-06-05 15:29:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:30,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:30,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:30,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 15:29:30,757 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash -934188650, now seen corresponding path program 96 times [2021-06-05 15:29:30,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:30,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212667617] [2021-06-05 15:29:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:31,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212667617] [2021-06-05 15:29:31,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212667617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993634919] [2021-06-05 15:29:31,088 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:31,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:29:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:31,364 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:31,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:29:31,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:31,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:31,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:31,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:29:31,574 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:31,574 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 43 treesize of output 23 [2021-06-05 15:29:31,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:31,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:31,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:31,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:29:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:31,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993634919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:31,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:31,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:29:31,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223773142] [2021-06-05 15:29:31,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:29:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:29:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:29:31,797 INFO L87 Difference]: Start difference. First operand 8772 states and 26606 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:34,626 INFO L93 Difference]: Finished difference Result 10119 states and 30529 transitions. [2021-06-05 15:29:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:29:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:34,639 INFO L225 Difference]: With dead ends: 10119 [2021-06-05 15:29:34,640 INFO L226 Difference]: Without dead ends: 9895 [2021-06-05 15:29:34,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1865.9ms TimeCoverageRelationStatistics Valid=236, Invalid=3424, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:29:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-05 15:29:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 8730. [2021-06-05 15:29:34,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 8729 states have (on average 3.0362011685187307) internal successors, (26503), 8729 states have internal predecessors, (26503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 26503 transitions. [2021-06-05 15:29:34,749 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 26503 transitions. Word has length 37 [2021-06-05 15:29:34,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:34,749 INFO L482 AbstractCegarLoop]: Abstraction has 8730 states and 26503 transitions. [2021-06-05 15:29:34,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 26503 transitions. [2021-06-05 15:29:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:34,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:34,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:34,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:34,959 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2051432632, now seen corresponding path program 97 times [2021-06-05 15:29:34,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:34,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634546292] [2021-06-05 15:29:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:35,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634546292] [2021-06-05 15:29:35,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634546292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:35,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461113204] [2021-06-05 15:29:35,436 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:35,681 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:29:35,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:29:35,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:35,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:35,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:35,689 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:29:35,900 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:35,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:35,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:35,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:35,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:36,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461113204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:36,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:36,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:36,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009640] [2021-06-05 15:29:36,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:36,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:36,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:36,098 INFO L87 Difference]: Start difference. First operand 8730 states and 26503 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:39,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:39,439 INFO L93 Difference]: Finished difference Result 13225 states and 39211 transitions. [2021-06-05 15:29:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:29:39,440 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:39,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:39,459 INFO L225 Difference]: With dead ends: 13225 [2021-06-05 15:29:39,459 INFO L226 Difference]: Without dead ends: 13043 [2021-06-05 15:29:39,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2791.4ms TimeCoverageRelationStatistics Valid=645, Invalid=6327, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:29:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13043 states. [2021-06-05 15:29:39,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13043 to 8868. [2021-06-05 15:29:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 3.0340588699672946) internal successors, (26903), 8867 states have internal predecessors, (26903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 26903 transitions. [2021-06-05 15:29:39,603 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 26903 transitions. Word has length 37 [2021-06-05 15:29:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:39,603 INFO L482 AbstractCegarLoop]: Abstraction has 8868 states and 26903 transitions. [2021-06-05 15:29:39,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 26903 transitions. [2021-06-05 15:29:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:39,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:39,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:39,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:39,816 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash -547228424, now seen corresponding path program 98 times [2021-06-05 15:29:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:39,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516970835] [2021-06-05 15:29:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:40,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516970835] [2021-06-05 15:29:40,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516970835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877623] [2021-06-05 15:29:40,147 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:40,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:29:40,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:40,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:29:40,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:40,389 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:40,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:29:40,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:40,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:40,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:40,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:29:40,687 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:40,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:40,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:40,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:40,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:40,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:40,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:40,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:40,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:29:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428077781] [2021-06-05 15:29:40,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:29:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:29:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:29:40,919 INFO L87 Difference]: Start difference. First operand 8868 states and 26903 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:43,742 INFO L93 Difference]: Finished difference Result 9926 states and 29891 transitions. [2021-06-05 15:29:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:29:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:43,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:43,755 INFO L225 Difference]: With dead ends: 9926 [2021-06-05 15:29:43,755 INFO L226 Difference]: Without dead ends: 9723 [2021-06-05 15:29:43,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2134.6ms TimeCoverageRelationStatistics Valid=282, Invalid=3878, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:29:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2021-06-05 15:29:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 8853. [2021-06-05 15:29:43,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.0353592408495254) internal successors, (26869), 8852 states have internal predecessors, (26869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:43,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26869 transitions. [2021-06-05 15:29:43,867 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26869 transitions. Word has length 37 [2021-06-05 15:29:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:43,867 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26869 transitions. [2021-06-05 15:29:43,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26869 transitions. [2021-06-05 15:29:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:43,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:43,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:44,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:29:44,078 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:44,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:44,078 INFO L82 PathProgramCache]: Analyzing trace with hash 307068626, now seen corresponding path program 99 times [2021-06-05 15:29:44,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:44,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284224421] [2021-06-05 15:29:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:44,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:44,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284224421] [2021-06-05 15:29:44,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284224421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:44,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66899931] [2021-06-05 15:29:44,521 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:44,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:29:44,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:29:44,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:44,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:44,751 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 27 treesize of output 15 [2021-06-05 15:29:44,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:44,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:44,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:44,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:29:44,979 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:44,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:44,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:44,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:44,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:44,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:45,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66899931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:45,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:45,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:45,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428906855] [2021-06-05 15:29:45,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:45,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:45,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:45,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:45,175 INFO L87 Difference]: Start difference. First operand 8853 states and 26869 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:48,813 INFO L93 Difference]: Finished difference Result 13518 states and 40103 transitions. [2021-06-05 15:29:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:29:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:48,832 INFO L225 Difference]: With dead ends: 13518 [2021-06-05 15:29:48,832 INFO L226 Difference]: Without dead ends: 13336 [2021-06-05 15:29:48,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 2844.0ms TimeCoverageRelationStatistics Valid=633, Invalid=6507, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:29:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13336 states. [2021-06-05 15:29:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13336 to 8853. [2021-06-05 15:29:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.033890646181654) internal successors, (26856), 8852 states have internal predecessors, (26856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:48,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26856 transitions. [2021-06-05 15:29:48,971 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26856 transitions. Word has length 37 [2021-06-05 15:29:48,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:48,972 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26856 transitions. [2021-06-05 15:29:48,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:48,972 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26856 transitions. [2021-06-05 15:29:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:48,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:48,982 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:49,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:49,182 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2003374866, now seen corresponding path program 100 times [2021-06-05 15:29:49,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:49,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194007107] [2021-06-05 15:29:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:49,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194007107] [2021-06-05 15:29:49,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194007107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:49,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139088088] [2021-06-05 15:29:49,509 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:49,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:49,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:49,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:49,734 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:29:49,734 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 [2021-06-05 15:29:49,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:49,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:49,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:49,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-06-05 15:29:49,973 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:29:49,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:49,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:49,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:29:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139088088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:50,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:50,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:29:50,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945268045] [2021-06-05 15:29:50,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:29:50,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:29:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:29:50,210 INFO L87 Difference]: Start difference. First operand 8853 states and 26856 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:52,743 INFO L93 Difference]: Finished difference Result 10082 states and 30409 transitions. [2021-06-05 15:29:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:29:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:52,756 INFO L225 Difference]: With dead ends: 10082 [2021-06-05 15:29:52,757 INFO L226 Difference]: Without dead ends: 9918 [2021-06-05 15:29:52,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1859.6ms TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:29:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2021-06-05 15:29:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 8847. [2021-06-05 15:29:52,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 3.034139724169116) internal successors, (26840), 8846 states have internal predecessors, (26840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 26840 transitions. [2021-06-05 15:29:52,876 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 26840 transitions. Word has length 37 [2021-06-05 15:29:52,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:52,876 INFO L482 AbstractCegarLoop]: Abstraction has 8847 states and 26840 transitions. [2021-06-05 15:29:52,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 26840 transitions. [2021-06-05 15:29:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:52,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:52,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:53,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 15:29:53,087 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash -177338290, now seen corresponding path program 101 times [2021-06-05 15:29:53,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:53,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031608220] [2021-06-05 15:29:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:53,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:53,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031608220] [2021-06-05 15:29:53,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031608220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:53,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639624639] [2021-06-05 15:29:53,443 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:53,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:29:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:53,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:53,670 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 27 treesize of output 15 [2021-06-05 15:29:53,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:53,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:53,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:53,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:29:53,848 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:53,849 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 32 treesize of output 20 [2021-06-05 15:29:53,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:53,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:53,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:53,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 15:29:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:54,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639624639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:54,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:54,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:29:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817971279] [2021-06-05 15:29:54,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:29:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:29:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:29:54,008 INFO L87 Difference]: Start difference. First operand 8847 states and 26840 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:56,094 INFO L93 Difference]: Finished difference Result 10413 states and 31212 transitions. [2021-06-05 15:29:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:29:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:29:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:56,109 INFO L225 Difference]: With dead ends: 10413 [2021-06-05 15:29:56,109 INFO L226 Difference]: Without dead ends: 10166 [2021-06-05 15:29:56,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1622.6ms TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:29:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10166 states. [2021-06-05 15:29:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10166 to 8964. [2021-06-05 15:29:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8964 states, 8963 states have (on average 3.0329130871360035) internal successors, (27184), 8963 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 27184 transitions. [2021-06-05 15:29:56,232 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 27184 transitions. Word has length 37 [2021-06-05 15:29:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:56,232 INFO L482 AbstractCegarLoop]: Abstraction has 8964 states and 27184 transitions. [2021-06-05 15:29:56,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 27184 transitions. [2021-06-05 15:29:56,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:29:56,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:56,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:56,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:56,443 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:56,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:56,443 INFO L82 PathProgramCache]: Analyzing trace with hash -728112670, now seen corresponding path program 102 times [2021-06-05 15:29:56,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:56,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966711504] [2021-06-05 15:29:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:56,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:56,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966711504] [2021-06-05 15:29:56,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966711504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:56,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683137284] [2021-06-05 15:29:56,818 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:56,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:29:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:56,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:29:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:57,050 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:57,050 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 27 treesize of output 15 [2021-06-05 15:29:57,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:57,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:57,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:57,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:29:57,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:29:57,282 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 38 treesize of output 22 [2021-06-05 15:29:57,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:29:57,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:29:57,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:29:57,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:29:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:57,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683137284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:57,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:57,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:29:57,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319579486] [2021-06-05 15:29:57,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:29:57,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:57,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:29:57,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:29:57,469 INFO L87 Difference]: Start difference. First operand 8964 states and 27184 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:00,562 INFO L93 Difference]: Finished difference Result 13768 states and 40896 transitions. [2021-06-05 15:30:00,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:30:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:00,581 INFO L225 Difference]: With dead ends: 13768 [2021-06-05 15:30:00,581 INFO L226 Difference]: Without dead ends: 13595 [2021-06-05 15:30:00,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 2470.5ms TimeCoverageRelationStatistics Valid=539, Invalid=5941, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:30:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13595 states. [2021-06-05 15:30:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13595 to 8960. [2021-06-05 15:30:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8960 states, 8959 states have (on average 3.034936934925773) internal successors, (27190), 8959 states have internal predecessors, (27190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8960 states to 8960 states and 27190 transitions. [2021-06-05 15:30:00,717 INFO L78 Accepts]: Start accepts. Automaton has 8960 states and 27190 transitions. Word has length 37 [2021-06-05 15:30:00,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:00,717 INFO L482 AbstractCegarLoop]: Abstraction has 8960 states and 27190 transitions. [2021-06-05 15:30:00,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 8960 states and 27190 transitions. [2021-06-05 15:30:00,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:00,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:00,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:00,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:00,927 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:00,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:00,928 INFO L82 PathProgramCache]: Analyzing trace with hash -890117900, now seen corresponding path program 103 times [2021-06-05 15:30:00,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:00,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880379410] [2021-06-05 15:30:00,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:01,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:01,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880379410] [2021-06-05 15:30:01,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880379410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:01,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073121984] [2021-06-05 15:30:01,336 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:01,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:30:01,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:01,570 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 15:30:01,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 15:30:01,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:01,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:01,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:01,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 15:30:01,804 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:01,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:01,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:01,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:01,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:01,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073121984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:02,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:02,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:30:02,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164872388] [2021-06-05 15:30:02,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:30:02,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:30:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:30:02,007 INFO L87 Difference]: Start difference. First operand 8960 states and 27190 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:05,319 INFO L93 Difference]: Finished difference Result 13626 states and 40559 transitions. [2021-06-05 15:30:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:30:05,319 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:05,342 INFO L225 Difference]: With dead ends: 13626 [2021-06-05 15:30:05,342 INFO L226 Difference]: Without dead ends: 13444 [2021-06-05 15:30:05,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2466.7ms TimeCoverageRelationStatistics Valid=506, Invalid=5814, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:30:05,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2021-06-05 15:30:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 9008. [2021-06-05 15:30:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.033085378039303) internal successors, (27319), 9007 states have internal predecessors, (27319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 27319 transitions. [2021-06-05 15:30:05,495 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 27319 transitions. Word has length 37 [2021-06-05 15:30:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:05,495 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 27319 transitions. [2021-06-05 15:30:05,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 27319 transitions. [2021-06-05 15:30:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:05,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:05,506 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:05,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:05,707 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:05,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:05,707 INFO L82 PathProgramCache]: Analyzing trace with hash 806188340, now seen corresponding path program 104 times [2021-06-05 15:30:05,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:05,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979735983] [2021-06-05 15:30:05,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:06,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:06,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979735983] [2021-06-05 15:30:06,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979735983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:06,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13979556] [2021-06-05 15:30:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:06,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:30:06,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:30:06,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:06,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:06,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:30:06,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:06,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:06,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:06,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 15:30:06,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:06,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:06,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:06,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:06,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:06,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13979556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:06,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:06,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:30:06,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212398255] [2021-06-05 15:30:06,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:30:06,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:30:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:30:06,729 INFO L87 Difference]: Start difference. First operand 9008 states and 27319 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:09,361 INFO L93 Difference]: Finished difference Result 10258 states and 30957 transitions. [2021-06-05 15:30:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:30:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:09,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:09,376 INFO L225 Difference]: With dead ends: 10258 [2021-06-05 15:30:09,376 INFO L226 Difference]: Without dead ends: 10094 [2021-06-05 15:30:09,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1798.9ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:30:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2021-06-05 15:30:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 8984. [2021-06-05 15:30:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 3.0332850940665703) internal successors, (27248), 8983 states have internal predecessors, (27248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 27248 transitions. [2021-06-05 15:30:09,492 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 27248 transitions. Word has length 37 [2021-06-05 15:30:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:09,492 INFO L482 AbstractCegarLoop]: Abstraction has 8984 states and 27248 transitions. [2021-06-05 15:30:09,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 27248 transitions. [2021-06-05 15:30:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:09,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:09,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:09,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:09,703 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:09,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1374524816, now seen corresponding path program 105 times [2021-06-05 15:30:09,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:09,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864260224] [2021-06-05 15:30:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864260224] [2021-06-05 15:30:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864260224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151775418] [2021-06-05 15:30:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:10,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:30:10,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:10,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:30:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:10,255 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:10,255 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 27 treesize of output 15 [2021-06-05 15:30:10,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:10,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:10,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:10,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:30:10,556 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:10,556 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 37 treesize of output 21 [2021-06-05 15:30:10,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:10,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:10,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:10,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-06-05 15:30:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:10,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151775418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:10,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:10,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:30:10,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761640661] [2021-06-05 15:30:10,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:30:10,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:10,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:30:10,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:30:10,776 INFO L87 Difference]: Start difference. First operand 8984 states and 27248 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:13,681 INFO L93 Difference]: Finished difference Result 10414 states and 31457 transitions. [2021-06-05 15:30:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:30:13,681 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:13,697 INFO L225 Difference]: With dead ends: 10414 [2021-06-05 15:30:13,697 INFO L226 Difference]: Without dead ends: 10169 [2021-06-05 15:30:13,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 2093.1ms TimeCoverageRelationStatistics Valid=256, Invalid=3650, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:30:13,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10169 states. [2021-06-05 15:30:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10169 to 9004. [2021-06-05 15:30:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 9003 states have (on average 3.035210485393758) internal successors, (27326), 9003 states have internal predecessors, (27326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 27326 transitions. [2021-06-05 15:30:13,821 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 27326 transitions. Word has length 37 [2021-06-05 15:30:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:13,821 INFO L482 AbstractCegarLoop]: Abstraction has 9004 states and 27326 transitions. [2021-06-05 15:30:13,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 27326 transitions. [2021-06-05 15:30:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:13,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:13,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:14,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 15:30:14,033 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:14,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2023109538, now seen corresponding path program 106 times [2021-06-05 15:30:14,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:14,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406665316] [2021-06-05 15:30:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:14,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:14,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406665316] [2021-06-05 15:30:14,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406665316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:14,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792645506] [2021-06-05 15:30:14,487 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:14,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:30:14,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:14,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:30:14,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:14,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:14,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:30:14,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:14,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:14,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:14,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 15:30:14,992 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:14,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:14,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:14,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:15,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:15,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792645506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:15,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:15,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:30:15,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22273558] [2021-06-05 15:30:15,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:30:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:30:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:30:15,193 INFO L87 Difference]: Start difference. First operand 9004 states and 27326 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:18,570 INFO L93 Difference]: Finished difference Result 14444 states and 43442 transitions. [2021-06-05 15:30:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:30:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:18,592 INFO L225 Difference]: With dead ends: 14444 [2021-06-05 15:30:18,592 INFO L226 Difference]: Without dead ends: 14352 [2021-06-05 15:30:18,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2478.6ms TimeCoverageRelationStatistics Valid=516, Invalid=5804, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:30:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14352 states. [2021-06-05 15:30:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14352 to 9126. [2021-06-05 15:30:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9126 states, 9125 states have (on average 3.0337534246575344) internal successors, (27683), 9125 states have internal predecessors, (27683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 27683 transitions. [2021-06-05 15:30:18,773 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 27683 transitions. Word has length 37 [2021-06-05 15:30:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:18,773 INFO L482 AbstractCegarLoop]: Abstraction has 9126 states and 27683 transitions. [2021-06-05 15:30:18,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 27683 transitions. [2021-06-05 15:30:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:18,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:18,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:18,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:18,986 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash -326803298, now seen corresponding path program 107 times [2021-06-05 15:30:18,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:18,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005627506] [2021-06-05 15:30:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:19,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:19,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005627506] [2021-06-05 15:30:19,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005627506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:19,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494857424] [2021-06-05 15:30:19,313 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:19,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:30:19,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:19,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:30:19,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:19,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:19,538 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 36 treesize of output 20 [2021-06-05 15:30:19,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:19,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:19,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:19,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:30:19,683 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:19,683 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 36 treesize of output 20 [2021-06-05 15:30:19,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:19,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:19,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:19,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 15:30:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:19,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494857424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:19,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:19,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:30:19,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896542826] [2021-06-05 15:30:19,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:30:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:30:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:30:19,869 INFO L87 Difference]: Start difference. First operand 9126 states and 27683 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:21,694 INFO L93 Difference]: Finished difference Result 11066 states and 33453 transitions. [2021-06-05 15:30:21,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:30:21,694 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:21,712 INFO L225 Difference]: With dead ends: 11066 [2021-06-05 15:30:21,712 INFO L226 Difference]: Without dead ends: 11008 [2021-06-05 15:30:21,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1337.5ms TimeCoverageRelationStatistics Valid=211, Invalid=2545, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:30:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-06-05 15:30:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 9139. [2021-06-05 15:30:21,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9139 states, 9138 states have (on average 3.0408185598599258) internal successors, (27787), 9138 states have internal predecessors, (27787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9139 states to 9139 states and 27787 transitions. [2021-06-05 15:30:21,833 INFO L78 Accepts]: Start accepts. Automaton has 9139 states and 27787 transitions. Word has length 37 [2021-06-05 15:30:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:21,833 INFO L482 AbstractCegarLoop]: Abstraction has 9139 states and 27787 transitions. [2021-06-05 15:30:21,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 9139 states and 27787 transitions. [2021-06-05 15:30:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:21,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:21,844 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:22,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:22,045 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2098593696, now seen corresponding path program 108 times [2021-06-05 15:30:22,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:22,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691460261] [2021-06-05 15:30:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:22,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:22,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691460261] [2021-06-05 15:30:22,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691460261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:22,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089538308] [2021-06-05 15:30:22,476 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:22,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:30:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:22,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:30:22,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:22,813 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:30:22,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:22,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:22,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:22,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 15:30:22,895 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:22,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 15:30:22,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:22,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:22,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:22,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:30:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:23,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089538308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:23,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:23,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:30:23,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857842835] [2021-06-05 15:30:23,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:30:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:30:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:30:23,074 INFO L87 Difference]: Start difference. First operand 9139 states and 27787 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:29,011 INFO L93 Difference]: Finished difference Result 21012 states and 62619 transitions. [2021-06-05 15:30:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 15:30:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:29,043 INFO L225 Difference]: With dead ends: 21012 [2021-06-05 15:30:29,043 INFO L226 Difference]: Without dead ends: 20662 [2021-06-05 15:30:29,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 4639.8ms TimeCoverageRelationStatistics Valid=1388, Invalid=13132, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 15:30:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20662 states. [2021-06-05 15:30:29,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20662 to 9536. [2021-06-05 15:30:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9536 states, 9535 states have (on average 3.042999475616151) internal successors, (29015), 9535 states have internal predecessors, (29015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:29,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9536 states to 9536 states and 29015 transitions. [2021-06-05 15:30:29,248 INFO L78 Accepts]: Start accepts. Automaton has 9536 states and 29015 transitions. Word has length 37 [2021-06-05 15:30:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:29,248 INFO L482 AbstractCegarLoop]: Abstraction has 9536 states and 29015 transitions. [2021-06-05 15:30:29,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:29,248 INFO L276 IsEmpty]: Start isEmpty. Operand 9536 states and 29015 transitions. [2021-06-05 15:30:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:29,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:29,259 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:29,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:29,459 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -402287456, now seen corresponding path program 109 times [2021-06-05 15:30:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:29,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286465047] [2021-06-05 15:30:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:29,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286465047] [2021-06-05 15:30:29,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286465047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:29,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703871662] [2021-06-05 15:30:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:29,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:30:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:30,192 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:30,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:30:30,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:30,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:30,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:30,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:39 [2021-06-05 15:30:30,265 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:30,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:30,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:30,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:30,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:30:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:30,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703871662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:30,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:30,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 15:30:30,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157199026] [2021-06-05 15:30:30,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:30:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:30:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:30:30,434 INFO L87 Difference]: Start difference. First operand 9536 states and 29015 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:34,813 INFO L93 Difference]: Finished difference Result 14707 states and 44309 transitions. [2021-06-05 15:30:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 15:30:34,813 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:34,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:34,833 INFO L225 Difference]: With dead ends: 14707 [2021-06-05 15:30:34,833 INFO L226 Difference]: Without dead ends: 14334 [2021-06-05 15:30:34,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2826.2ms TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:30:34,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-06-05 15:30:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9486. [2021-06-05 15:30:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9486 states, 9485 states have (on average 3.0481813389562467) internal successors, (28912), 9485 states have internal predecessors, (28912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9486 states to 9486 states and 28912 transitions. [2021-06-05 15:30:34,978 INFO L78 Accepts]: Start accepts. Automaton has 9486 states and 28912 transitions. Word has length 37 [2021-06-05 15:30:34,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:34,978 INFO L482 AbstractCegarLoop]: Abstraction has 9486 states and 28912 transitions. [2021-06-05 15:30:34,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:34,978 INFO L276 IsEmpty]: Start isEmpty. Operand 9486 states and 28912 transitions. [2021-06-05 15:30:34,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:34,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:34,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:35,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:35,189 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:35,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash 956108654, now seen corresponding path program 110 times [2021-06-05 15:30:35,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:35,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857150281] [2021-06-05 15:30:35,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:35,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:35,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857150281] [2021-06-05 15:30:35,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857150281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:35,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611072831] [2021-06-05 15:30:35,586 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:35,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:30:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:30:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:35,944 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:35,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:30:35,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:35,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:35,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:35,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:30:36,027 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:36,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:36,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:36,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:36,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:36,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:36,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611072831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:36,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:36,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 15:30:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704818650] [2021-06-05 15:30:36,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:30:36,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:36,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:30:36,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:30:36,235 INFO L87 Difference]: Start difference. First operand 9486 states and 28912 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:41,824 INFO L93 Difference]: Finished difference Result 19378 states and 57436 transitions. [2021-06-05 15:30:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 15:30:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:41,849 INFO L225 Difference]: With dead ends: 19378 [2021-06-05 15:30:41,849 INFO L226 Difference]: Without dead ends: 19107 [2021-06-05 15:30:41,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3967 ImplicationChecksByTransitivity, 4650.6ms TimeCoverageRelationStatistics Valid=1333, Invalid=12947, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 15:30:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2021-06-05 15:30:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 9555. [2021-06-05 15:30:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9555 states, 9554 states have (on average 3.043541971948922) internal successors, (29078), 9554 states have internal predecessors, (29078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9555 states to 9555 states and 29078 transitions. [2021-06-05 15:30:42,012 INFO L78 Accepts]: Start accepts. Automaton has 9555 states and 29078 transitions. Word has length 37 [2021-06-05 15:30:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:42,012 INFO L482 AbstractCegarLoop]: Abstraction has 9555 states and 29078 transitions. [2021-06-05 15:30:42,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9555 states and 29078 transitions. [2021-06-05 15:30:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:42,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:42,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:42,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:42,223 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1642552402, now seen corresponding path program 111 times [2021-06-05 15:30:42,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:42,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748772158] [2021-06-05 15:30:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:42,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748772158] [2021-06-05 15:30:42,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748772158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:42,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819368429] [2021-06-05 15:30:42,645 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:42,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:30:42,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:42,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:30:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:43,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:43,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:30:43,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:43,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:43,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:43,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 15:30:43,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:30:43,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:30:43,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 15:30:43,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:43,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:43,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:43,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 15:30:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:43,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819368429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:43,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:43,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:30:43,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544562779] [2021-06-05 15:30:43,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:30:43,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:30:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:30:43,317 INFO L87 Difference]: Start difference. First operand 9555 states and 29078 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:48,772 INFO L93 Difference]: Finished difference Result 14453 states and 43491 transitions. [2021-06-05 15:30:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 15:30:48,772 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:48,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:48,793 INFO L225 Difference]: With dead ends: 14453 [2021-06-05 15:30:48,793 INFO L226 Difference]: Without dead ends: 14142 [2021-06-05 15:30:48,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 3588.6ms TimeCoverageRelationStatistics Valid=606, Invalid=8706, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 15:30:48,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14142 states. [2021-06-05 15:30:48,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14142 to 9678. [2021-06-05 15:30:48,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.0522889325204092) internal successors, (29537), 9677 states have internal predecessors, (29537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 29537 transitions. [2021-06-05 15:30:48,975 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 29537 transitions. Word has length 37 [2021-06-05 15:30:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:48,975 INFO L482 AbstractCegarLoop]: Abstraction has 9678 states and 29537 transitions. [2021-06-05 15:30:48,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 29537 transitions. [2021-06-05 15:30:48,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:48,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:48,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:49,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 15:30:49,188 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:49,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:49,189 INFO L82 PathProgramCache]: Analyzing trace with hash 45112722, now seen corresponding path program 112 times [2021-06-05 15:30:49,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:49,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044244196] [2021-06-05 15:30:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:49,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:49,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044244196] [2021-06-05 15:30:49,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044244196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786243012] [2021-06-05 15:30:49,547 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:49,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:30:49,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:30:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:49,789 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:49,790 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 27 treesize of output 15 [2021-06-05 15:30:49,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:49,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:49,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:49,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:30:49,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:49,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:49,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:49,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786243012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:50,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:50,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:30:50,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542866718] [2021-06-05 15:30:50,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:30:50,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:50,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:30:50,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:30:50,175 INFO L87 Difference]: Start difference. First operand 9678 states and 29537 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:56,286 INFO L93 Difference]: Finished difference Result 18391 states and 54943 transitions. [2021-06-05 15:30:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 15:30:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:56,324 INFO L225 Difference]: With dead ends: 18391 [2021-06-05 15:30:56,325 INFO L226 Difference]: Without dead ends: 18112 [2021-06-05 15:30:56,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 4555.8ms TimeCoverageRelationStatistics Valid=1249, Invalid=12091, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 15:30:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18112 states. [2021-06-05 15:30:56,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18112 to 9905. [2021-06-05 15:30:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9905 states, 9904 states have (on average 3.050787560581583) internal successors, (30215), 9904 states have internal predecessors, (30215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9905 states to 9905 states and 30215 transitions. [2021-06-05 15:30:56,544 INFO L78 Accepts]: Start accepts. Automaton has 9905 states and 30215 transitions. Word has length 37 [2021-06-05 15:30:56,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:56,544 INFO L482 AbstractCegarLoop]: Abstraction has 9905 states and 30215 transitions. [2021-06-05 15:30:56,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 9905 states and 30215 transitions. [2021-06-05 15:30:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:56,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:56,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:56,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:56,756 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1741418962, now seen corresponding path program 113 times [2021-06-05 15:30:56,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:56,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564914760] [2021-06-05 15:30:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:57,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:57,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564914760] [2021-06-05 15:30:57,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564914760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:57,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436274736] [2021-06-05 15:30:57,140 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:57,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:30:57,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:30:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:57,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:30:57,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:57,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:57,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:57,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:30:57,555 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:30:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:30:57,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:30:57,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:30:57,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:30:57,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:30:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:57,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436274736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:57,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:57,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 15:30:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485324805] [2021-06-05 15:30:57,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:30:57,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:30:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:30:57,712 INFO L87 Difference]: Start difference. First operand 9905 states and 30215 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:59,178 INFO L93 Difference]: Finished difference Result 11608 states and 35225 transitions. [2021-06-05 15:30:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:30:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:30:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:59,194 INFO L225 Difference]: With dead ends: 11608 [2021-06-05 15:30:59,194 INFO L226 Difference]: Without dead ends: 11412 [2021-06-05 15:30:59,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1509.5ms TimeCoverageRelationStatistics Valid=289, Invalid=3133, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:30:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2021-06-05 15:30:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 10057. [2021-06-05 15:30:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10057 states, 10056 states have (on average 3.057875894988067) internal successors, (30750), 10056 states have internal predecessors, (30750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 30750 transitions. [2021-06-05 15:30:59,321 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 30750 transitions. Word has length 37 [2021-06-05 15:30:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:59,321 INFO L482 AbstractCegarLoop]: Abstraction has 10057 states and 30750 transitions. [2021-06-05 15:30:59,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:59,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 30750 transitions. [2021-06-05 15:30:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:30:59,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:59,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:59,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:59,532 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:59,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:59,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2018791546, now seen corresponding path program 114 times [2021-06-05 15:30:59,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:59,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801386401] [2021-06-05 15:30:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:59,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:59,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801386401] [2021-06-05 15:30:59,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801386401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:59,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731539551] [2021-06-05 15:30:59,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:00,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:31:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:31:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:00,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:00,217 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 27 treesize of output 15 [2021-06-05 15:31:00,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:00,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:00,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:00,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:00,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:00,418 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 38 treesize of output 22 [2021-06-05 15:31:00,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:00,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:00,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:00,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 15:31:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:00,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731539551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:00,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:00,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22518684] [2021-06-05 15:31:00,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:00,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:00,611 INFO L87 Difference]: Start difference. First operand 10057 states and 30750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:05,090 INFO L93 Difference]: Finished difference Result 15470 states and 46761 transitions. [2021-06-05 15:31:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:31:05,090 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:05,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:05,111 INFO L225 Difference]: With dead ends: 15470 [2021-06-05 15:31:05,111 INFO L226 Difference]: Without dead ends: 15214 [2021-06-05 15:31:05,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 3296.1ms TimeCoverageRelationStatistics Valid=523, Invalid=7849, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 15:31:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-06-05 15:31:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 10066. [2021-06-05 15:31:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 10065 states have (on average 3.0572280178837556) internal successors, (30771), 10065 states have internal predecessors, (30771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 30771 transitions. [2021-06-05 15:31:05,264 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 30771 transitions. Word has length 37 [2021-06-05 15:31:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:05,264 INFO L482 AbstractCegarLoop]: Abstraction has 10066 states and 30771 transitions. [2021-06-05 15:31:05,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 30771 transitions. [2021-06-05 15:31:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:05,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:05,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:05,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 15:31:05,477 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:05,477 INFO L82 PathProgramCache]: Analyzing trace with hash 95462594, now seen corresponding path program 115 times [2021-06-05 15:31:05,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:05,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322201234] [2021-06-05 15:31:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:05,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:05,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322201234] [2021-06-05 15:31:05,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322201234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:05,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015384482] [2021-06-05 15:31:05,865 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:06,112 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:06,112 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 27 treesize of output 15 [2021-06-05 15:31:06,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:06,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:06,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:06,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:06,371 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:06,371 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 30 treesize of output 18 [2021-06-05 15:31:06,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:06,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:06,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:06,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:31:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:06,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015384482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:06,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:06,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:06,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765547446] [2021-06-05 15:31:06,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:06,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:06,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:06,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:06,551 INFO L87 Difference]: Start difference. First operand 10066 states and 30771 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:10,671 INFO L93 Difference]: Finished difference Result 15547 states and 47074 transitions. [2021-06-05 15:31:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:31:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:10,693 INFO L225 Difference]: With dead ends: 15547 [2021-06-05 15:31:10,694 INFO L226 Difference]: Without dead ends: 15268 [2021-06-05 15:31:10,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3031.3ms TimeCoverageRelationStatistics Valid=442, Invalid=6868, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:31:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15268 states. [2021-06-05 15:31:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15268 to 10253. [2021-06-05 15:31:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.0635973468591495) internal successors, (31408), 10252 states have internal predecessors, (31408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31408 transitions. [2021-06-05 15:31:10,920 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31408 transitions. Word has length 37 [2021-06-05 15:31:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:10,920 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31408 transitions. [2021-06-05 15:31:10,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31408 transitions. [2021-06-05 15:31:10,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:10,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:10,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:11,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:11,130 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:11,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:11,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1240994454, now seen corresponding path program 116 times [2021-06-05 15:31:11,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:11,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163029473] [2021-06-05 15:31:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:11,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:11,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163029473] [2021-06-05 15:31:11,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163029473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:11,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467606379] [2021-06-05 15:31:11,509 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:11,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:31:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:11,775 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:11,775 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 27 treesize of output 15 [2021-06-05 15:31:11,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:11,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:11,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:11,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:11,973 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:11,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:11,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:11,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:11,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:11,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:31:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:12,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467606379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:12,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:12,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:12,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627702150] [2021-06-05 15:31:12,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:12,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:12,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:12,187 INFO L87 Difference]: Start difference. First operand 10253 states and 31408 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:16,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:16,568 INFO L93 Difference]: Finished difference Result 15818 states and 47909 transitions. [2021-06-05 15:31:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:31:16,568 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:16,591 INFO L225 Difference]: With dead ends: 15818 [2021-06-05 15:31:16,592 INFO L226 Difference]: Without dead ends: 15562 [2021-06-05 15:31:16,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 3124.3ms TimeCoverageRelationStatistics Valid=472, Invalid=7010, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 15:31:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15562 states. [2021-06-05 15:31:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15562 to 10253. [2021-06-05 15:31:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.063304721030043) internal successors, (31405), 10252 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31405 transitions. [2021-06-05 15:31:16,753 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31405 transitions. Word has length 37 [2021-06-05 15:31:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:16,753 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31405 transitions. [2021-06-05 15:31:16,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31405 transitions. [2021-06-05 15:31:16,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:16,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:16,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:16,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:16,965 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:16,965 INFO L82 PathProgramCache]: Analyzing trace with hash -939718702, now seen corresponding path program 117 times [2021-06-05 15:31:16,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:16,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836941192] [2021-06-05 15:31:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:17,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:17,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836941192] [2021-06-05 15:31:17,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836941192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:17,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260064153] [2021-06-05 15:31:17,343 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:17,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:31:17,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:17,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:31:17,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:17,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:31:17,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:17,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:17,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:17,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:31:17,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:17,845 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 44 treesize of output 24 [2021-06-05 15:31:17,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:17,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:17,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:17,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:31:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:18,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260064153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:18,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:18,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:18,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032302313] [2021-06-05 15:31:18,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:18,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:18,012 INFO L87 Difference]: Start difference. First operand 10253 states and 31405 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:22,375 INFO L93 Difference]: Finished difference Result 16186 states and 49037 transitions. [2021-06-05 15:31:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:31:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:22,398 INFO L225 Difference]: With dead ends: 16186 [2021-06-05 15:31:22,399 INFO L226 Difference]: Without dead ends: 15910 [2021-06-05 15:31:22,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 3045.8ms TimeCoverageRelationStatistics Valid=448, Invalid=6862, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:31:22,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15910 states. [2021-06-05 15:31:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15910 to 10271. [2021-06-05 15:31:22,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10271 states, 10270 states have (on average 3.0632911392405062) internal successors, (31460), 10270 states have internal predecessors, (31460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:22,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10271 states to 10271 states and 31460 transitions. [2021-06-05 15:31:22,591 INFO L78 Accepts]: Start accepts. Automaton has 10271 states and 31460 transitions. Word has length 37 [2021-06-05 15:31:22,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:22,591 INFO L482 AbstractCegarLoop]: Abstraction has 10271 states and 31460 transitions. [2021-06-05 15:31:22,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10271 states and 31460 transitions. [2021-06-05 15:31:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:22,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:22,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:22,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 15:31:22,803 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2146589852, now seen corresponding path program 118 times [2021-06-05 15:31:22,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:22,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407011233] [2021-06-05 15:31:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:23,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:23,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407011233] [2021-06-05 15:31:23,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407011233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:23,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029692423] [2021-06-05 15:31:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:23,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:31:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:23,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:23,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:31:23,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:23,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:23,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:23,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:23,720 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:23,720 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 30 treesize of output 18 [2021-06-05 15:31:23,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:23,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:23,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:23,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:31:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:23,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029692423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:23,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:23,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489526742] [2021-06-05 15:31:23,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:23,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:23,903 INFO L87 Difference]: Start difference. First operand 10271 states and 31460 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:28,033 INFO L93 Difference]: Finished difference Result 15619 states and 47242 transitions. [2021-06-05 15:31:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:31:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:28,056 INFO L225 Difference]: With dead ends: 15619 [2021-06-05 15:31:28,056 INFO L226 Difference]: Without dead ends: 15327 [2021-06-05 15:31:28,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 3011.1ms TimeCoverageRelationStatistics Valid=409, Invalid=6233, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:31:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15327 states. [2021-06-05 15:31:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15327 to 10241. [2021-06-05 15:31:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10240 states have (on average 3.0640625) internal successors, (31376), 10240 states have internal predecessors, (31376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 31376 transitions. [2021-06-05 15:31:28,207 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 31376 transitions. Word has length 37 [2021-06-05 15:31:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:28,207 INFO L482 AbstractCegarLoop]: Abstraction has 10241 states and 31376 transitions. [2021-06-05 15:31:28,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 31376 transitions. [2021-06-05 15:31:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:28,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:28,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:28,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:28,420 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1398529486, now seen corresponding path program 119 times [2021-06-05 15:31:28,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:28,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168607727] [2021-06-05 15:31:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:28,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168607727] [2021-06-05 15:31:28,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168607727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:28,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282715817] [2021-06-05 15:31:28,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:28,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:31:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:31:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:29,033 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:29,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:31:29,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:29,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:29,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:29,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:29,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:29,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:31:29,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:29,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:29,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:29,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:31:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:29,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282715817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:29,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:29,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:31:29,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278421903] [2021-06-05 15:31:29,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:31:29,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:31:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:31:29,288 INFO L87 Difference]: Start difference. First operand 10241 states and 31376 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:32,248 INFO L93 Difference]: Finished difference Result 19517 states and 58523 transitions. [2021-06-05 15:31:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:31:32,249 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:32,276 INFO L225 Difference]: With dead ends: 19517 [2021-06-05 15:31:32,276 INFO L226 Difference]: Without dead ends: 19238 [2021-06-05 15:31:32,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 2655.8ms TimeCoverageRelationStatistics Valid=812, Invalid=7378, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 15:31:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19238 states. [2021-06-05 15:31:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19238 to 10138. [2021-06-05 15:31:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 3.059583703265266) internal successors, (31015), 10137 states have internal predecessors, (31015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 31015 transitions. [2021-06-05 15:31:32,454 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 31015 transitions. Word has length 37 [2021-06-05 15:31:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:32,455 INFO L482 AbstractCegarLoop]: Abstraction has 10138 states and 31015 transitions. [2021-06-05 15:31:32,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 31015 transitions. [2021-06-05 15:31:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:32,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:32,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:32,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 15:31:32,666 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1200131570, now seen corresponding path program 120 times [2021-06-05 15:31:32,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:32,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232770990] [2021-06-05 15:31:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:33,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232770990] [2021-06-05 15:31:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232770990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:33,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063689253] [2021-06-05 15:31:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:33,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:31:33,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:33,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:31:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:33,303 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:33,303 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 27 treesize of output 15 [2021-06-05 15:31:33,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:33,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:33,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:33,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:33,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:33,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:33,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:33,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:33,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:33,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 15:31:33,706 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:33,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063689253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:33,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:33,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:33,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206914357] [2021-06-05 15:31:33,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:33,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:33,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:33,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:33,707 INFO L87 Difference]: Start difference. First operand 10138 states and 31015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:35,896 INFO L93 Difference]: Finished difference Result 12990 states and 39338 transitions. [2021-06-05 15:31:35,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:31:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:35,915 INFO L225 Difference]: With dead ends: 12990 [2021-06-05 15:31:35,916 INFO L226 Difference]: Without dead ends: 12694 [2021-06-05 15:31:35,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1693.8ms TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:31:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12694 states. [2021-06-05 15:31:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12694 to 10072. [2021-06-05 15:31:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0629530334624167) internal successors, (30847), 10071 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30847 transitions. [2021-06-05 15:31:36,057 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30847 transitions. Word has length 37 [2021-06-05 15:31:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:36,057 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30847 transitions. [2021-06-05 15:31:36,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30847 transitions. [2021-06-05 15:31:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:36,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:36,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:36,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 15:31:36,273 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -482505722, now seen corresponding path program 121 times [2021-06-05 15:31:36,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:36,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958102234] [2021-06-05 15:31:36,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:36,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958102234] [2021-06-05 15:31:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958102234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:36,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276720671] [2021-06-05 15:31:36,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:36,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:37,100 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:31:37,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:37,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:37,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:37,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:31:37,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:37,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:37,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:37,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:37,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:37,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:31:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:37,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276720671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:37,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:37,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 15:31:37,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488586218] [2021-06-05 15:31:37,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:31:37,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:31:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:31:37,388 INFO L87 Difference]: Start difference. First operand 10072 states and 30847 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:40,971 INFO L93 Difference]: Finished difference Result 15078 states and 45035 transitions. [2021-06-05 15:31:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:31:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:40,992 INFO L225 Difference]: With dead ends: 15078 [2021-06-05 15:31:40,992 INFO L226 Difference]: Without dead ends: 14872 [2021-06-05 15:31:40,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2938.9ms TimeCoverageRelationStatistics Valid=638, Invalid=6168, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:31:41,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2021-06-05 15:31:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 10048. [2021-06-05 15:31:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 3.059321190405096) internal successors, (30737), 10047 states have internal predecessors, (30737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 30737 transitions. [2021-06-05 15:31:41,156 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 30737 transitions. Word has length 37 [2021-06-05 15:31:41,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:41,156 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 30737 transitions. [2021-06-05 15:31:41,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:41,156 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 30737 transitions. [2021-06-05 15:31:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:41,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:41,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:41,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 15:31:41,369 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:41,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1213800518, now seen corresponding path program 122 times [2021-06-05 15:31:41,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:41,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810469755] [2021-06-05 15:31:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:41,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:41,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810469755] [2021-06-05 15:31:41,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810469755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:41,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426521670] [2021-06-05 15:31:41,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:41,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:31:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:31:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:42,089 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:42,089 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 38 treesize of output 22 [2021-06-05 15:31:42,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:42,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:42,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:42,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:24 [2021-06-05 15:31:42,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:42,158 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 27 treesize of output 15 [2021-06-05 15:31:42,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:42,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:42,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:42,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 15:31:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:42,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426521670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:42,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:42,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:31:42,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482260641] [2021-06-05 15:31:42,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:31:42,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:42,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:31:42,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:31:42,335 INFO L87 Difference]: Start difference. First operand 10048 states and 30737 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:43,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:43,945 INFO L93 Difference]: Finished difference Result 11444 states and 34793 transitions. [2021-06-05 15:31:43,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:31:43,945 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:43,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:43,961 INFO L225 Difference]: With dead ends: 11444 [2021-06-05 15:31:43,961 INFO L226 Difference]: Without dead ends: 11212 [2021-06-05 15:31:43,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1348.4ms TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:31:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2021-06-05 15:31:44,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9988. [2021-06-05 15:31:44,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 3.0625813557624912) internal successors, (30586), 9987 states have internal predecessors, (30586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:44,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 30586 transitions. [2021-06-05 15:31:44,160 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 30586 transitions. Word has length 37 [2021-06-05 15:31:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:44,160 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 30586 transitions. [2021-06-05 15:31:44,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 30586 transitions. [2021-06-05 15:31:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:44,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:44,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:44,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:44,372 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1393501654, now seen corresponding path program 123 times [2021-06-05 15:31:44,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:44,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131097332] [2021-06-05 15:31:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:44,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:44,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131097332] [2021-06-05 15:31:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131097332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:44,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656792125] [2021-06-05 15:31:44,729 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:44,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:31:44,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:44,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:44,980 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:44,980 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 27 treesize of output 15 [2021-06-05 15:31:44,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:44,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:44,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:44,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:45,169 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:45,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:45,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:45,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:45,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:45,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:31:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656792125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:45,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:45,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:45,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855866675] [2021-06-05 15:31:45,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:45,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:45,372 INFO L87 Difference]: Start difference. First operand 9988 states and 30586 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:48,622 INFO L93 Difference]: Finished difference Result 14398 states and 43235 transitions. [2021-06-05 15:31:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:31:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:48,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:48,643 INFO L225 Difference]: With dead ends: 14398 [2021-06-05 15:31:48,643 INFO L226 Difference]: Without dead ends: 14119 [2021-06-05 15:31:48,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2504.5ms TimeCoverageRelationStatistics Valid=512, Invalid=5038, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:31:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14119 states. [2021-06-05 15:31:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 10072. [2021-06-05 15:31:48,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0604706583258863) internal successors, (30822), 10071 states have internal predecessors, (30822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:48,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30822 transitions. [2021-06-05 15:31:48,803 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30822 transitions. Word has length 37 [2021-06-05 15:31:48,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:48,803 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30822 transitions. [2021-06-05 15:31:48,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:48,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30822 transitions. [2021-06-05 15:31:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:48,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:48,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:49,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 15:31:49,015 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash 302804586, now seen corresponding path program 124 times [2021-06-05 15:31:49,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:49,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85757157] [2021-06-05 15:31:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:49,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85757157] [2021-06-05 15:31:49,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85757157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477717670] [2021-06-05 15:31:49,382 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:49,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:31:49,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:31:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:49,644 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:49,644 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 27 treesize of output 15 [2021-06-05 15:31:49,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:49,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:49,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:49,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:49,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:49,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:49,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:49,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:49,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:31:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477717670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:50,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:50,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:50,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101706995] [2021-06-05 15:31:50,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:50,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:50,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:50,073 INFO L87 Difference]: Start difference. First operand 10072 states and 30822 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:52,764 INFO L93 Difference]: Finished difference Result 11139 states and 33907 transitions. [2021-06-05 15:31:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:31:52,765 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:52,780 INFO L225 Difference]: With dead ends: 11139 [2021-06-05 15:31:52,780 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 15:31:52,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 2075.2ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:31:52,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 15:31:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10021. [2021-06-05 15:31:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 3.061676646706587) internal successors, (30678), 10020 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 30678 transitions. [2021-06-05 15:31:52,906 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 30678 transitions. Word has length 37 [2021-06-05 15:31:52,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:52,906 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 30678 transitions. [2021-06-05 15:31:52,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 30678 transitions. [2021-06-05 15:31:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:52,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:52,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:53,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 15:31:53,117 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash 837561374, now seen corresponding path program 125 times [2021-06-05 15:31:53,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:53,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543727456] [2021-06-05 15:31:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:53,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:53,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543727456] [2021-06-05 15:31:53,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543727456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:53,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985843307] [2021-06-05 15:31:53,506 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:53,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:31:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:53,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:31:53,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:53,760 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:53,760 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 27 treesize of output 15 [2021-06-05 15:31:53,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:53,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:53,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:53,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:53,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:53,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:31:53,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:53,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:53,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:53,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:31:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:54,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985843307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:54,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:54,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:54,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902439029] [2021-06-05 15:31:54,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:54,220 INFO L87 Difference]: Start difference. First operand 10021 states and 30678 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:56,865 INFO L93 Difference]: Finished difference Result 11714 states and 35534 transitions. [2021-06-05 15:31:56,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:31:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:31:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:56,883 INFO L225 Difference]: With dead ends: 11714 [2021-06-05 15:31:56,883 INFO L226 Difference]: Without dead ends: 11527 [2021-06-05 15:31:56,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2155.6ms TimeCoverageRelationStatistics Valid=271, Invalid=3761, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:31:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11527 states. [2021-06-05 15:31:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11527 to 10053. [2021-06-05 15:31:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 10052 states have (on average 3.0612813370473537) internal successors, (30772), 10052 states have internal predecessors, (30772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 30772 transitions. [2021-06-05 15:31:57,033 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 30772 transitions. Word has length 37 [2021-06-05 15:31:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:57,033 INFO L482 AbstractCegarLoop]: Abstraction has 10053 states and 30772 transitions. [2021-06-05 15:31:57,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 30772 transitions. [2021-06-05 15:31:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:31:57,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:57,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:57,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 15:31:57,246 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1343151782, now seen corresponding path program 126 times [2021-06-05 15:31:57,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:57,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276087385] [2021-06-05 15:31:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:57,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276087385] [2021-06-05 15:31:57,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276087385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:57,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541119897] [2021-06-05 15:31:57,627 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:57,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:31:57,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:31:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:57,891 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:57,891 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 27 treesize of output 15 [2021-06-05 15:31:57,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:57,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:57,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:57,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:31:58,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:31:58,160 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 24 [2021-06-05 15:31:58,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:31:58,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:31:58,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:31:58,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:31:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:58,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541119897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:58,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:58,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:31:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769420412] [2021-06-05 15:31:58,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:31:58,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:58,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:31:58,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:31:58,333 INFO L87 Difference]: Start difference. First operand 10053 states and 30772 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:01,084 INFO L93 Difference]: Finished difference Result 11647 states and 35316 transitions. [2021-06-05 15:32:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:32:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:01,100 INFO L225 Difference]: With dead ends: 11647 [2021-06-05 15:32:01,100 INFO L226 Difference]: Without dead ends: 11447 [2021-06-05 15:32:01,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2061.1ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:32:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11447 states. [2021-06-05 15:32:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11447 to 10036. [2021-06-05 15:32:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.0617837568510216) internal successors, (30725), 10035 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30725 transitions. [2021-06-05 15:32:01,234 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30725 transitions. Word has length 37 [2021-06-05 15:32:01,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:01,234 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30725 transitions. [2021-06-05 15:32:01,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30725 transitions. [2021-06-05 15:32:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:01,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:01,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:01,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:01,446 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:01,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:01,446 INFO L82 PathProgramCache]: Analyzing trace with hash -197619922, now seen corresponding path program 127 times [2021-06-05 15:32:01,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:01,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229708388] [2021-06-05 15:32:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:01,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229708388] [2021-06-05 15:32:01,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229708388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:01,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683882018] [2021-06-05 15:32:01,816 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:02,075 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:02,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:32:02,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:02,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:02,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:02,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:32:02,276 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:02,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:02,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:02,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:02,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:02,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:02,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683882018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:02,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:02,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:02,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144343608] [2021-06-05 15:32:02,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:02,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:02,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:02,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:02,494 INFO L87 Difference]: Start difference. First operand 10036 states and 30725 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:05,117 INFO L93 Difference]: Finished difference Result 11924 states and 36186 transitions. [2021-06-05 15:32:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:32:05,117 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:05,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:05,134 INFO L225 Difference]: With dead ends: 11924 [2021-06-05 15:32:05,134 INFO L226 Difference]: Without dead ends: 11737 [2021-06-05 15:32:05,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2055.6ms TimeCoverageRelationStatistics Valid=272, Invalid=3760, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:32:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-06-05 15:32:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 10036. [2021-06-05 15:32:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.061484803188839) internal successors, (30722), 10035 states have internal predecessors, (30722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30722 transitions. [2021-06-05 15:32:05,279 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30722 transitions. Word has length 37 [2021-06-05 15:32:05,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:05,279 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30722 transitions. [2021-06-05 15:32:05,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:05,279 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30722 transitions. [2021-06-05 15:32:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:05,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:05,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:05,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,492 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1916634218, now seen corresponding path program 128 times [2021-06-05 15:32:05,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:05,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184358093] [2021-06-05 15:32:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:05,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:05,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184358093] [2021-06-05 15:32:05,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184358093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:05,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590883442] [2021-06-05 15:32:05,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:05,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:05,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:32:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:06,115 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:06,115 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 27 treesize of output 15 [2021-06-05 15:32:06,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:06,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:06,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:06,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:32:06,261 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:06,261 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 30 treesize of output 18 [2021-06-05 15:32:06,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:06,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:06,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:06,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:06,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590883442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:06,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:06,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:32:06,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160536655] [2021-06-05 15:32:06,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:32:06,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:06,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:32:06,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:32:06,409 INFO L87 Difference]: Start difference. First operand 10036 states and 30722 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:07,996 INFO L93 Difference]: Finished difference Result 11857 states and 35960 transitions. [2021-06-05 15:32:07,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:32:07,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:08,013 INFO L225 Difference]: With dead ends: 11857 [2021-06-05 15:32:08,013 INFO L226 Difference]: Without dead ends: 11641 [2021-06-05 15:32:08,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1344.4ms TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:32:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11641 states. [2021-06-05 15:32:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11641 to 10009. [2021-06-05 15:32:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.062150279776179) internal successors, (30646), 10008 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30646 transitions. [2021-06-05 15:32:08,146 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30646 transitions. Word has length 37 [2021-06-05 15:32:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:08,146 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30646 transitions. [2021-06-05 15:32:08,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30646 transitions. [2021-06-05 15:32:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:08,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:08,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:08,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-06-05 15:32:08,358 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -40084890, now seen corresponding path program 129 times [2021-06-05 15:32:08,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:08,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017720647] [2021-06-05 15:32:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:08,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:08,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017720647] [2021-06-05 15:32:08,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017720647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:08,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257389614] [2021-06-05 15:32:08,700 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:08,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:32:08,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:08,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:08,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:08,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:32:08,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:08,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:08,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:08,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 15:32:09,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:09,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:09,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:09,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:09,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:09,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257389614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:09,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:09,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:09,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658088857] [2021-06-05 15:32:09,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:09,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:09,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:09,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:09,353 INFO L87 Difference]: Start difference. First operand 10009 states and 30646 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:12,218 INFO L93 Difference]: Finished difference Result 13826 states and 41577 transitions. [2021-06-05 15:32:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:32:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:12,238 INFO L225 Difference]: With dead ends: 13826 [2021-06-05 15:32:12,238 INFO L226 Difference]: Without dead ends: 13644 [2021-06-05 15:32:12,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2335.4ms TimeCoverageRelationStatistics Valid=433, Invalid=4679, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:32:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13644 states. [2021-06-05 15:32:12,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13644 to 10084. [2021-06-05 15:32:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10084 states, 10083 states have (on average 3.0606962213626896) internal successors, (30861), 10083 states have internal predecessors, (30861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 30861 transitions. [2021-06-05 15:32:12,433 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 30861 transitions. Word has length 37 [2021-06-05 15:32:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:12,433 INFO L482 AbstractCegarLoop]: Abstraction has 10084 states and 30861 transitions. [2021-06-05 15:32:12,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 30861 transitions. [2021-06-05 15:32:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:12,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:12,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:12,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 15:32:12,646 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1656221350, now seen corresponding path program 130 times [2021-06-05 15:32:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:12,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137413962] [2021-06-05 15:32:12,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:12,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:12,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137413962] [2021-06-05 15:32:12,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137413962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:12,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99204424] [2021-06-05 15:32:12,993 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:13,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:13,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:13,246 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 15:32:13,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:13,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:13,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:13,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:32:13,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:13,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:13,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:13,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:13,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:13,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99204424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:13,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:13,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:13,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910415924] [2021-06-05 15:32:13,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:13,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:13,677 INFO L87 Difference]: Start difference. First operand 10084 states and 30861 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:16,465 INFO L93 Difference]: Finished difference Result 11406 states and 34747 transitions. [2021-06-05 15:32:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:32:16,465 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:16,481 INFO L225 Difference]: With dead ends: 11406 [2021-06-05 15:32:16,481 INFO L226 Difference]: Without dead ends: 11242 [2021-06-05 15:32:16,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2039.7ms TimeCoverageRelationStatistics Valid=254, Invalid=3528, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:32:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-06-05 15:32:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 10018. [2021-06-05 15:32:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10017 states have (on average 3.0614954577218727) internal successors, (30667), 10017 states have internal predecessors, (30667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 30667 transitions. [2021-06-05 15:32:16,611 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 30667 transitions. Word has length 37 [2021-06-05 15:32:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:16,611 INFO L482 AbstractCegarLoop]: Abstraction has 10018 states and 30667 transitions. [2021-06-05 15:32:16,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 30667 transitions. [2021-06-05 15:32:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:16,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:16,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:16,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 15:32:16,823 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:16,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1754628988, now seen corresponding path program 131 times [2021-06-05 15:32:16,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:16,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339132511] [2021-06-05 15:32:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:16,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:17,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:17,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339132511] [2021-06-05 15:32:17,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339132511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:17,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239575664] [2021-06-05 15:32:17,180 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:17,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:32:17,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 15:32:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:17,443 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:17,443 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 27 treesize of output 15 [2021-06-05 15:32:17,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:17,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:17,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:17,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 15:32:17,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:17,751 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 30 treesize of output 18 [2021-06-05 15:32:17,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:17,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:17,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:17,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 15:32:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239575664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:17,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:17,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:17,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746354734] [2021-06-05 15:32:17,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:17,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:17,935 INFO L87 Difference]: Start difference. First operand 10018 states and 30667 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:20,993 INFO L93 Difference]: Finished difference Result 11821 states and 35885 transitions. [2021-06-05 15:32:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:32:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:21,009 INFO L225 Difference]: With dead ends: 11821 [2021-06-05 15:32:21,009 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 15:32:21,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2344.0ms TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:32:21,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 15:32:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10051. [2021-06-05 15:32:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10050 states have (on average 3.0612935323383086) internal successors, (30766), 10050 states have internal predecessors, (30766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 30766 transitions. [2021-06-05 15:32:21,155 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 30766 transitions. Word has length 37 [2021-06-05 15:32:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:21,155 INFO L482 AbstractCegarLoop]: Abstraction has 10051 states and 30766 transitions. [2021-06-05 15:32:21,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:21,156 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 30766 transitions. [2021-06-05 15:32:21,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:21,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:21,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:21,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 15:32:21,368 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 547757838, now seen corresponding path program 132 times [2021-06-05 15:32:21,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:21,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002808033] [2021-06-05 15:32:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:21,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:21,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002808033] [2021-06-05 15:32:21,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002808033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:21,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663481635] [2021-06-05 15:32:21,776 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:21,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:32:21,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:32:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:22,041 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 15:32:22,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:22,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:22,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:22,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 15:32:22,295 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:22,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 15:32:22,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:22,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:22,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:22,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:32:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:22,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663481635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:22,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:22,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:22,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278561081] [2021-06-05 15:32:22,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:22,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:22,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:22,473 INFO L87 Difference]: Start difference. First operand 10051 states and 30766 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:25,036 INFO L93 Difference]: Finished difference Result 11899 states and 36165 transitions. [2021-06-05 15:32:25,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:32:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:25,055 INFO L225 Difference]: With dead ends: 11899 [2021-06-05 15:32:25,055 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 15:32:25,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1978.4ms TimeCoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:32:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 15:32:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 10015. [2021-06-05 15:32:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.06291192330737) internal successors, (30672), 10014 states have internal predecessors, (30672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30672 transitions. [2021-06-05 15:32:25,233 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30672 transitions. Word has length 37 [2021-06-05 15:32:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:25,233 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30672 transitions. [2021-06-05 15:32:25,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30672 transitions. [2021-06-05 15:32:25,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:25,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:25,245 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:25,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:25,445 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:25,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash 859170464, now seen corresponding path program 133 times [2021-06-05 15:32:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:25,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957124785] [2021-06-05 15:32:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:25,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:25,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957124785] [2021-06-05 15:32:25,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957124785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:25,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094829529] [2021-06-05 15:32:25,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:25,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:25,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:26,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:26,057 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 27 treesize of output 15 [2021-06-05 15:32:26,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:26,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:26,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:26,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:32:26,267 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:26,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:26,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:26,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:26,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:26,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:26,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094829529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:26,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:26,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:32:26,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529409118] [2021-06-05 15:32:26,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:32:26,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:32:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:32:26,458 INFO L87 Difference]: Start difference. First operand 10015 states and 30672 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:29,651 INFO L93 Difference]: Finished difference Result 13542 states and 40720 transitions. [2021-06-05 15:32:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:32:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:29,671 INFO L225 Difference]: With dead ends: 13542 [2021-06-05 15:32:29,671 INFO L226 Difference]: Without dead ends: 13360 [2021-06-05 15:32:29,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 2442.3ms TimeCoverageRelationStatistics Valid=562, Invalid=5290, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:32:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13360 states. [2021-06-05 15:32:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13360 to 10030. [2021-06-05 15:32:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 3.061421876557982) internal successors, (30703), 10029 states have internal predecessors, (30703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 30703 transitions. [2021-06-05 15:32:29,826 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 30703 transitions. Word has length 37 [2021-06-05 15:32:29,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:29,826 INFO L482 AbstractCegarLoop]: Abstraction has 10030 states and 30703 transitions. [2021-06-05 15:32:29,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 30703 transitions. [2021-06-05 15:32:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:29,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:29,838 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:30,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:30,038 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1739490592, now seen corresponding path program 134 times [2021-06-05 15:32:30,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:30,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583359560] [2021-06-05 15:32:30,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:30,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:30,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583359560] [2021-06-05 15:32:30,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583359560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:30,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532779720] [2021-06-05 15:32:30,488 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:30,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:30,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:30,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:30,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:30,705 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:30,706 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 27 treesize of output 15 [2021-06-05 15:32:30,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:30,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:30,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:30,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:32:30,931 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:30,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:30,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:30,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:30,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:30,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:31,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532779720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:31,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:31,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:31,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324714181] [2021-06-05 15:32:31,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:31,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:31,161 INFO L87 Difference]: Start difference. First operand 10030 states and 30703 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:33,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:33,800 INFO L93 Difference]: Finished difference Result 11133 states and 33857 transitions. [2021-06-05 15:32:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:32:33,801 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:33,815 INFO L225 Difference]: With dead ends: 11133 [2021-06-05 15:32:33,815 INFO L226 Difference]: Without dead ends: 10930 [2021-06-05 15:32:33,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2340.6ms TimeCoverageRelationStatistics Valid=305, Invalid=4117, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:32:33,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2021-06-05 15:32:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 10015. [2021-06-05 15:32:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.062612342720192) internal successors, (30669), 10014 states have internal predecessors, (30669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30669 transitions. [2021-06-05 15:32:33,945 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30669 transitions. Word has length 37 [2021-06-05 15:32:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:33,945 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30669 transitions. [2021-06-05 15:32:33,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30669 transitions. [2021-06-05 15:32:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:33,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:33,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:34,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:34,157 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:34,157 INFO L82 PathProgramCache]: Analyzing trace with hash -885193542, now seen corresponding path program 135 times [2021-06-05 15:32:34,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:34,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679826388] [2021-06-05 15:32:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:34,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:34,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679826388] [2021-06-05 15:32:34,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679826388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:34,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696925546] [2021-06-05 15:32:34,563 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:34,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:32:34,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:34,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:34,779 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 27 treesize of output 15 [2021-06-05 15:32:34,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:34,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:34,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:34,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:32:34,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:34,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:34,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:35,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:35,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:35,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:35,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696925546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:35,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:35,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:32:35,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504477787] [2021-06-05 15:32:35,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:32:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:32:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:32:35,188 INFO L87 Difference]: Start difference. First operand 10015 states and 30669 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:38,029 INFO L93 Difference]: Finished difference Result 13770 states and 41415 transitions. [2021-06-05 15:32:38,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:32:38,029 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:38,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:38,049 INFO L225 Difference]: With dead ends: 13770 [2021-06-05 15:32:38,050 INFO L226 Difference]: Without dead ends: 13588 [2021-06-05 15:32:38,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2559.9ms TimeCoverageRelationStatistics Valid=550, Invalid=5456, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:32:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2021-06-05 15:32:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 10015. [2021-06-05 15:32:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.061314160175754) internal successors, (30656), 10014 states have internal predecessors, (30656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30656 transitions. [2021-06-05 15:32:38,209 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30656 transitions. Word has length 37 [2021-06-05 15:32:38,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:38,209 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30656 transitions. [2021-06-05 15:32:38,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30656 transitions. [2021-06-05 15:32:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:38,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:38,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:38,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 15:32:38,421 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash 811112698, now seen corresponding path program 136 times [2021-06-05 15:32:38,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:38,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055740655] [2021-06-05 15:32:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:38,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:38,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055740655] [2021-06-05 15:32:38,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055740655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:38,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026520127] [2021-06-05 15:32:38,767 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:38,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:32:38,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:38,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:38,999 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:32:39,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:39,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:39,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:39,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 15:32:39,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:39,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:39,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:39,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:39,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:39,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:39,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026520127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:39,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:39,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:39,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656438125] [2021-06-05 15:32:39,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:39,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:39,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:39,456 INFO L87 Difference]: Start difference. First operand 10015 states and 30656 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:41,888 INFO L93 Difference]: Finished difference Result 11289 states and 34375 transitions. [2021-06-05 15:32:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:32:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:41,903 INFO L225 Difference]: With dead ends: 11289 [2021-06-05 15:32:41,903 INFO L226 Difference]: Without dead ends: 11125 [2021-06-05 15:32:41,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1959.5ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:32:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2021-06-05 15:32:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 10009. [2021-06-05 15:32:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.061550759392486) internal successors, (30640), 10008 states have internal predecessors, (30640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30640 transitions. [2021-06-05 15:32:42,027 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30640 transitions. Word has length 37 [2021-06-05 15:32:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:42,027 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30640 transitions. [2021-06-05 15:32:42,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30640 transitions. [2021-06-05 15:32:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:42,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:42,038 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:42,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:32:42,238 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:42,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:42,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1369600458, now seen corresponding path program 137 times [2021-06-05 15:32:42,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:42,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345759617] [2021-06-05 15:32:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:42,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345759617] [2021-06-05 15:32:42,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345759617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:42,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328044691] [2021-06-05 15:32:42,597 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:42,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:32:42,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:32:42,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:42,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:42,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:42,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:42,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:42,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 15:32:42,977 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:42,977 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 37 treesize of output 21 [2021-06-05 15:32:42,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:42,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:42,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:42,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 15:32:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:43,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328044691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:43,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:43,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:32:43,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734382472] [2021-06-05 15:32:43,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:32:43,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:32:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:32:43,130 INFO L87 Difference]: Start difference. First operand 10009 states and 30640 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:45,045 INFO L93 Difference]: Finished difference Result 11530 states and 34936 transitions. [2021-06-05 15:32:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:32:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:45,064 INFO L225 Difference]: With dead ends: 11530 [2021-06-05 15:32:45,064 INFO L226 Difference]: Without dead ends: 11283 [2021-06-05 15:32:45,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1511.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2935, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:32:45,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2021-06-05 15:32:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 10060. [2021-06-05 15:32:45,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10060 states, 10059 states have (on average 3.0610398647976935) internal successors, (30791), 10059 states have internal predecessors, (30791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10060 states to 10060 states and 30791 transitions. [2021-06-05 15:32:45,204 INFO L78 Accepts]: Start accepts. Automaton has 10060 states and 30791 transitions. Word has length 37 [2021-06-05 15:32:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:45,204 INFO L482 AbstractCegarLoop]: Abstraction has 10060 states and 30791 transitions. [2021-06-05 15:32:45,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 10060 states and 30791 transitions. [2021-06-05 15:32:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:45,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:45,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:45,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 15:32:45,417 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:45,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1920374838, now seen corresponding path program 138 times [2021-06-05 15:32:45,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:45,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210706833] [2021-06-05 15:32:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:45,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210706833] [2021-06-05 15:32:45,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210706833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:45,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589588890] [2021-06-05 15:32:45,834 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:45,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:32:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:45,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:32:45,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:46,055 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:46,055 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 27 treesize of output 15 [2021-06-05 15:32:46,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:46,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:46,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:46,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:32:46,280 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:46,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 15:32:46,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:46,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:46,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:46,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 15:32:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:46,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589588890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:46,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:46,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:32:46,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031961137] [2021-06-05 15:32:46,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:32:46,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:32:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:32:46,463 INFO L87 Difference]: Start difference. First operand 10060 states and 30791 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:49,439 INFO L93 Difference]: Finished difference Result 13998 states and 42140 transitions. [2021-06-05 15:32:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:32:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:49,459 INFO L225 Difference]: With dead ends: 13998 [2021-06-05 15:32:49,460 INFO L226 Difference]: Without dead ends: 13825 [2021-06-05 15:32:49,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2297.0ms TimeCoverageRelationStatistics Valid=477, Invalid=5073, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:32:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-06-05 15:32:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 9973. [2021-06-05 15:32:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9973 states, 9972 states have (on average 3.0628760529482553) internal successors, (30543), 9972 states have internal predecessors, (30543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:49,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9973 states to 9973 states and 30543 transitions. [2021-06-05 15:32:49,612 INFO L78 Accepts]: Start accepts. Automaton has 9973 states and 30543 transitions. Word has length 37 [2021-06-05 15:32:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:49,612 INFO L482 AbstractCegarLoop]: Abstraction has 9973 states and 30543 transitions. [2021-06-05 15:32:49,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9973 states and 30543 transitions. [2021-06-05 15:32:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:49,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:49,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:49,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 15:32:49,825 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash -2082380068, now seen corresponding path program 139 times [2021-06-05 15:32:49,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:49,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35322648] [2021-06-05 15:32:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:50,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35322648] [2021-06-05 15:32:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35322648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512208368] [2021-06-05 15:32:50,197 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:50,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:50,417 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:50,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:32:50,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:50,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:50,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:50,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-06-05 15:32:50,635 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:50,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:50,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:50,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:50,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:50,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512208368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:50,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:50,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:32:50,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196136157] [2021-06-05 15:32:50,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:32:50,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:50,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:32:50,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:32:50,827 INFO L87 Difference]: Start difference. First operand 9973 states and 30543 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:53,187 INFO L93 Difference]: Finished difference Result 13546 states and 40841 transitions. [2021-06-05 15:32:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:32:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:53,206 INFO L225 Difference]: With dead ends: 13546 [2021-06-05 15:32:53,206 INFO L226 Difference]: Without dead ends: 13364 [2021-06-05 15:32:53,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2115.7ms TimeCoverageRelationStatistics Valid=427, Invalid=4685, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:32:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13364 states. [2021-06-05 15:32:53,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13364 to 9949. [2021-06-05 15:32:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9949 states, 9948 states have (on average 3.0618214716525936) internal successors, (30459), 9948 states have internal predecessors, (30459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9949 states to 9949 states and 30459 transitions. [2021-06-05 15:32:53,349 INFO L78 Accepts]: Start accepts. Automaton has 9949 states and 30459 transitions. Word has length 37 [2021-06-05 15:32:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:53,350 INFO L482 AbstractCegarLoop]: Abstraction has 9949 states and 30459 transitions. [2021-06-05 15:32:53,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 9949 states and 30459 transitions. [2021-06-05 15:32:53,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:53,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:53,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:53,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:53,565 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash -386073828, now seen corresponding path program 140 times [2021-06-05 15:32:53,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:53,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816403855] [2021-06-05 15:32:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:53,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:53,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816403855] [2021-06-05 15:32:53,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816403855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:53,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332668224] [2021-06-05 15:32:53,890 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:53,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:32:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:32:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:54,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 15:32:54,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:54,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:54,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:54,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 15:32:54,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:54,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:32:54,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:54,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:54,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:54,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:32:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332668224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:54,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:54,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:54,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851430069] [2021-06-05 15:32:54,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:54,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:54,560 INFO L87 Difference]: Start difference. First operand 9949 states and 30459 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:57,115 INFO L93 Difference]: Finished difference Result 11253 states and 34294 transitions. [2021-06-05 15:32:57,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:32:57,116 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:32:57,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:57,131 INFO L225 Difference]: With dead ends: 11253 [2021-06-05 15:32:57,131 INFO L226 Difference]: Without dead ends: 11089 [2021-06-05 15:32:57,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1929.6ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:32:57,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-06-05 15:32:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 9925. [2021-06-05 15:32:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 3.0620717452640065) internal successors, (30388), 9924 states have internal predecessors, (30388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 30388 transitions. [2021-06-05 15:32:57,257 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 30388 transitions. Word has length 37 [2021-06-05 15:32:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:57,258 INFO L482 AbstractCegarLoop]: Abstraction has 9925 states and 30388 transitions. [2021-06-05 15:32:57,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 30388 transitions. [2021-06-05 15:32:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:32:57,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:57,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:57,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 15:32:57,469 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:57,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1728180312, now seen corresponding path program 141 times [2021-06-05 15:32:57,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:57,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056626604] [2021-06-05 15:32:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:57,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056626604] [2021-06-05 15:32:57,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056626604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650475385] [2021-06-05 15:32:57,800 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:57,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:32:57,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:32:57,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:58,024 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:58,024 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 27 treesize of output 15 [2021-06-05 15:32:58,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:58,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:58,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:58,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 15:32:58,314 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:32:58,314 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 24 [2021-06-05 15:32:58,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:32:58,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:32:58,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:32:58,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 15:32:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:58,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650475385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:58,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:58,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 15:32:58,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311867273] [2021-06-05 15:32:58,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 15:32:58,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 15:32:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:32:58,548 INFO L87 Difference]: Start difference. First operand 9925 states and 30388 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:01,135 INFO L93 Difference]: Finished difference Result 11364 states and 34628 transitions. [2021-06-05 15:33:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:33:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:33:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:01,151 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 15:33:01,151 INFO L226 Difference]: Without dead ends: 11119 [2021-06-05 15:33:01,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2154.1ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:33:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-06-05 15:33:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 9871. [2021-06-05 15:33:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 3.0641337386018237) internal successors, (30243), 9870 states have internal predecessors, (30243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 30243 transitions. [2021-06-05 15:33:01,275 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 30243 transitions. Word has length 37 [2021-06-05 15:33:01,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:01,276 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 30243 transitions. [2021-06-05 15:33:01,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:01,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 30243 transitions. [2021-06-05 15:33:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:33:01,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:01,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:01,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 15:33:01,487 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1079595590, now seen corresponding path program 142 times [2021-06-05 15:33:01,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:01,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416274820] [2021-06-05 15:33:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:01,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416274820] [2021-06-05 15:33:01,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416274820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331989460] [2021-06-05 15:33:01,850 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:01,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:01,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:33:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:02,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:33:02,119 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 27 treesize of output 15 [2021-06-05 15:33:02,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:02,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:02,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:02,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:33:02,337 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:33:02,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:33:02,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:02,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:02,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:02,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 15:33:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331989460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:02,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:02,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 15:33:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792711574] [2021-06-05 15:33:02,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:33:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:33:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:33:02,530 INFO L87 Difference]: Start difference. First operand 9871 states and 30243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:05,026 INFO L93 Difference]: Finished difference Result 14084 states and 42790 transitions. [2021-06-05 15:33:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:33:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:33:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:05,046 INFO L225 Difference]: With dead ends: 14084 [2021-06-05 15:33:05,047 INFO L226 Difference]: Without dead ends: 13992 [2021-06-05 15:33:05,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2117.2ms TimeCoverageRelationStatistics Valid=451, Invalid=4805, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:33:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-06-05 15:33:05,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 9993. [2021-06-05 15:33:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9992 states have (on average 3.0624499599679744) internal successors, (30600), 9992 states have internal predecessors, (30600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:05,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 30600 transitions. [2021-06-05 15:33:05,200 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 30600 transitions. Word has length 37 [2021-06-05 15:33:05,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:05,200 INFO L482 AbstractCegarLoop]: Abstraction has 9993 states and 30600 transitions. [2021-06-05 15:33:05,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:05,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 30600 transitions. [2021-06-05 15:33:05,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:33:05,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:05,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:05,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 15:33:05,412 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:05,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:05,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1519065466, now seen corresponding path program 143 times [2021-06-05 15:33:05,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:05,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207775366] [2021-06-05 15:33:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:05,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207775366] [2021-06-05 15:33:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207775366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337556474] [2021-06-05 15:33:05,790 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:05,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:33:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 15:33:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:06,054 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:33:06,054 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 27 treesize of output 15 [2021-06-05 15:33:06,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:06,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:06,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:06,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 15:33:06,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 15:33:06,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 15:33:06,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:06,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:06,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:06,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 15:33:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:06,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337556474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:06,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:06,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 15:33:06,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919979446] [2021-06-05 15:33:06,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 15:33:06,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:06,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 15:33:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:33:06,445 INFO L87 Difference]: Start difference. First operand 9993 states and 30600 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:08,067 INFO L93 Difference]: Finished difference Result 11852 states and 36185 transitions. [2021-06-05 15:33:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:33:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:33:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:08,085 INFO L225 Difference]: With dead ends: 11852 [2021-06-05 15:33:08,085 INFO L226 Difference]: Without dead ends: 11794 [2021-06-05 15:33:08,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1440.1ms TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:33:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-06-05 15:33:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 9787. [2021-06-05 15:33:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9787 states, 9786 states have (on average 3.066830165542612) internal successors, (30012), 9786 states have internal predecessors, (30012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9787 states to 9787 states and 30012 transitions. [2021-06-05 15:33:08,216 INFO L78 Accepts]: Start accepts. Automaton has 9787 states and 30012 transitions. Word has length 37 [2021-06-05 15:33:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:08,216 INFO L482 AbstractCegarLoop]: Abstraction has 9787 states and 30012 transitions. [2021-06-05 15:33:08,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9787 states and 30012 transitions. [2021-06-05 15:33:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:33:08,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:08,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:08,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:08,429 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1180480077, now seen corresponding path program 144 times [2021-06-05 15:33:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496721928] [2021-06-05 15:33:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:08,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:08,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496721928] [2021-06-05 15:33:08,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496721928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:08,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499097939] [2021-06-05 15:33:08,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:08,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:33:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:08,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 15:33:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:08,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:08,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:08,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:08,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 15:33:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:08,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499097939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:08,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:08,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:33:08,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039706197] [2021-06-05 15:33:08,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:33:08,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:08,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:33:08,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:33:08,647 INFO L87 Difference]: Start difference. First operand 9787 states and 30012 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:08,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:08,870 INFO L93 Difference]: Finished difference Result 14719 states and 43834 transitions. [2021-06-05 15:33:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:33:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:33:08,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:08,896 INFO L225 Difference]: With dead ends: 14719 [2021-06-05 15:33:08,896 INFO L226 Difference]: Without dead ends: 14719 [2021-06-05 15:33:08,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:33:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14719 states. [2021-06-05 15:33:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14719 to 7251. [2021-06-05 15:33:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 7250 states have (on average 2.9986206896551724) internal successors, (21740), 7250 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 21740 transitions. [2021-06-05 15:33:09,095 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 21740 transitions. Word has length 40 [2021-06-05 15:33:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:09,096 INFO L482 AbstractCegarLoop]: Abstraction has 7251 states and 21740 transitions. [2021-06-05 15:33:09,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 21740 transitions. [2021-06-05 15:33:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:33:09,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:09,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:09,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:09,304 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1976946397, now seen corresponding path program 145 times [2021-06-05 15:33:09,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:09,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296138363] [2021-06-05 15:33:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:33:09,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:09,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296138363] [2021-06-05 15:33:09,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296138363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738401550] [2021-06-05 15:33:09,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:09,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:33:09,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:33:09,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738401550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:09,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:33:09,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064870849] [2021-06-05 15:33:09,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:33:09,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:33:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:33:09,396 INFO L87 Difference]: Start difference. First operand 7251 states and 21740 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:09,434 INFO L93 Difference]: Finished difference Result 12876 states and 38235 transitions. [2021-06-05 15:33:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:33:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:33:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:09,451 INFO L225 Difference]: With dead ends: 12876 [2021-06-05 15:33:09,451 INFO L226 Difference]: Without dead ends: 12623 [2021-06-05 15:33:09,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:33:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-06-05 15:33:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 9029. [2021-06-05 15:33:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9029 states, 9028 states have (on average 3.026251661497563) internal successors, (27321), 9028 states have internal predecessors, (27321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9029 states to 9029 states and 27321 transitions. [2021-06-05 15:33:09,575 INFO L78 Accepts]: Start accepts. Automaton has 9029 states and 27321 transitions. Word has length 41 [2021-06-05 15:33:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:09,575 INFO L482 AbstractCegarLoop]: Abstraction has 9029 states and 27321 transitions. [2021-06-05 15:33:09,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:09,575 INFO L276 IsEmpty]: Start isEmpty. Operand 9029 states and 27321 transitions. [2021-06-05 15:33:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 15:33:09,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:09,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:09,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:09,785 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1280099314, now seen corresponding path program 146 times [2021-06-05 15:33:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:09,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512028519] [2021-06-05 15:33:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:09,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512028519] [2021-06-05 15:33:09,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512028519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656866218] [2021-06-05 15:33:09,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:09,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:09,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:33:09,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:09,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656866218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:09,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:09,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 15:33:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884110566] [2021-06-05 15:33:09,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:33:09,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:09,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:33:09,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:33:09,887 INFO L87 Difference]: Start difference. First operand 9029 states and 27321 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 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) [2021-06-05 15:33:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:09,940 INFO L93 Difference]: Finished difference Result 18744 states and 57280 transitions. [2021-06-05 15:33:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:33:09,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 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 42 [2021-06-05 15:33:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:09,966 INFO L225 Difference]: With dead ends: 18744 [2021-06-05 15:33:09,967 INFO L226 Difference]: Without dead ends: 18363 [2021-06-05 15:33:09,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:33:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18363 states. [2021-06-05 15:33:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18363 to 15994. [2021-06-05 15:33:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15994 states, 15993 states have (on average 3.1260551491277435) internal successors, (49995), 15993 states have internal predecessors, (49995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 49995 transitions. [2021-06-05 15:33:10,184 INFO L78 Accepts]: Start accepts. Automaton has 15994 states and 49995 transitions. Word has length 42 [2021-06-05 15:33:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:10,184 INFO L482 AbstractCegarLoop]: Abstraction has 15994 states and 49995 transitions. [2021-06-05 15:33:10,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 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) [2021-06-05 15:33:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15994 states and 49995 transitions. [2021-06-05 15:33:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:10,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:10,204 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:10,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:10,404 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1019224685, now seen corresponding path program 147 times [2021-06-05 15:33:10,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:10,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927897066] [2021-06-05 15:33:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:10,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:10,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927897066] [2021-06-05 15:33:10,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927897066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:10,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11095320] [2021-06-05 15:33:10,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:10,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:33:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:33:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:11,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 29 [2021-06-05 15:33:11,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:11,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:11,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:11,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:49 [2021-06-05 15:33:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:11,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11095320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:11,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:11,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 26 [2021-06-05 15:33:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674389114] [2021-06-05 15:33:11,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:33:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:33:11,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:33:11,213 INFO L87 Difference]: Start difference. First operand 15994 states and 49995 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:14,041 INFO L93 Difference]: Finished difference Result 23103 states and 71053 transitions. [2021-06-05 15:33:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:33:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:14,075 INFO L225 Difference]: With dead ends: 23103 [2021-06-05 15:33:14,075 INFO L226 Difference]: Without dead ends: 23103 [2021-06-05 15:33:14,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1977.4ms TimeCoverageRelationStatistics Valid=412, Invalid=4280, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:33:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23103 states. [2021-06-05 15:33:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23103 to 18466. [2021-06-05 15:33:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18466 states, 18465 states have (on average 3.106959111833198) internal successors, (57370), 18465 states have internal predecessors, (57370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18466 states to 18466 states and 57370 transitions. [2021-06-05 15:33:14,350 INFO L78 Accepts]: Start accepts. Automaton has 18466 states and 57370 transitions. Word has length 45 [2021-06-05 15:33:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:14,350 INFO L482 AbstractCegarLoop]: Abstraction has 18466 states and 57370 transitions. [2021-06-05 15:33:14,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18466 states and 57370 transitions. [2021-06-05 15:33:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:14,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:14,371 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:14,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:14,572 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash 701638189, now seen corresponding path program 148 times [2021-06-05 15:33:14,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:14,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47610820] [2021-06-05 15:33:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:14,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47610820] [2021-06-05 15:33:14,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47610820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:14,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534451887] [2021-06-05 15:33:14,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:14,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:14,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:14,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:33:14,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:14,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:33:14,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:14,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:14,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:14,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:7 [2021-06-05 15:33:14,888 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 11 treesize of output 7 [2021-06-05 15:33:14,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:14,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:14,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:14,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:33:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:14,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534451887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:14,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:14,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 15:33:14,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40109652] [2021-06-05 15:33:14,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:33:14,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:14,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:33:14,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:33:14,917 INFO L87 Difference]: Start difference. First operand 18466 states and 57370 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:15,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:15,515 INFO L93 Difference]: Finished difference Result 29935 states and 92230 transitions. [2021-06-05 15:33:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:33:15,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:15,564 INFO L225 Difference]: With dead ends: 29935 [2021-06-05 15:33:15,565 INFO L226 Difference]: Without dead ends: 29935 [2021-06-05 15:33:15,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:33:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29935 states. [2021-06-05 15:33:15,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29935 to 20625. [2021-06-05 15:33:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.1061869666408066) internal successors, (64062), 20624 states have internal predecessors, (64062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 64062 transitions. [2021-06-05 15:33:15,894 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 64062 transitions. Word has length 45 [2021-06-05 15:33:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:15,894 INFO L482 AbstractCegarLoop]: Abstraction has 20625 states and 64062 transitions. [2021-06-05 15:33:15,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 64062 transitions. [2021-06-05 15:33:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:15,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:15,917 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:16,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:16,117 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash 380212589, now seen corresponding path program 149 times [2021-06-05 15:33:16,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:16,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575989305] [2021-06-05 15:33:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:16,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575989305] [2021-06-05 15:33:16,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575989305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:16,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203415771] [2021-06-05 15:33:16,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:16,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:33:16,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:33:16,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:16,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:16,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:16,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:16,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:16,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2021-06-05 15:33:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:16,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:16,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:16,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:16,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:16,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 15:33:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203415771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:16,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:16,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 15:33:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33182824] [2021-06-05 15:33:16,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:33:16,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:16,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:33:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:33:16,452 INFO L87 Difference]: Start difference. First operand 20625 states and 64062 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:17,074 INFO L93 Difference]: Finished difference Result 35863 states and 110465 transitions. [2021-06-05 15:33:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:33:17,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:17,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:17,130 INFO L225 Difference]: With dead ends: 35863 [2021-06-05 15:33:17,130 INFO L226 Difference]: Without dead ends: 35863 [2021-06-05 15:33:17,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:33:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35863 states. [2021-06-05 15:33:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35863 to 20780. [2021-06-05 15:33:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20780 states, 20779 states have (on average 3.106020501467828) internal successors, (64540), 20779 states have internal predecessors, (64540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20780 states to 20780 states and 64540 transitions. [2021-06-05 15:33:17,683 INFO L78 Accepts]: Start accepts. Automaton has 20780 states and 64540 transitions. Word has length 45 [2021-06-05 15:33:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:17,683 INFO L482 AbstractCegarLoop]: Abstraction has 20780 states and 64540 transitions. [2021-06-05 15:33:17,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20780 states and 64540 transitions. [2021-06-05 15:33:17,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:17,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:17,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:17,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:17,912 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2033549703, now seen corresponding path program 150 times [2021-06-05 15:33:17,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:17,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205874689] [2021-06-05 15:33:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:18,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:18,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205874689] [2021-06-05 15:33:18,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205874689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:18,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255478945] [2021-06-05 15:33:18,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:18,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:33:18,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:18,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:33:18,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:33:18,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:18,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:18,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:18,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-06-05 15:33:18,373 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 11 treesize of output 7 [2021-06-05 15:33:18,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:18,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:18,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:18,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:33:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255478945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:18,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:18,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 15:33:18,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275463221] [2021-06-05 15:33:18,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:33:18,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:33:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:33:18,417 INFO L87 Difference]: Start difference. First operand 20780 states and 64540 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:19,213 INFO L93 Difference]: Finished difference Result 38900 states and 119843 transitions. [2021-06-05 15:33:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:33:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:19,275 INFO L225 Difference]: With dead ends: 38900 [2021-06-05 15:33:19,276 INFO L226 Difference]: Without dead ends: 38900 [2021-06-05 15:33:19,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:33:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38900 states. [2021-06-05 15:33:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38900 to 22864. [2021-06-05 15:33:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22864 states, 22863 states have (on average 3.1030048550059046) internal successors, (70944), 22863 states have internal predecessors, (70944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22864 states to 22864 states and 70944 transitions. [2021-06-05 15:33:19,927 INFO L78 Accepts]: Start accepts. Automaton has 22864 states and 70944 transitions. Word has length 45 [2021-06-05 15:33:19,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:19,927 INFO L482 AbstractCegarLoop]: Abstraction has 22864 states and 70944 transitions. [2021-06-05 15:33:19,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:19,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22864 states and 70944 transitions. [2021-06-05 15:33:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:19,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:19,952 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:20,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 15:33:20,153 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277079, now seen corresponding path program 151 times [2021-06-05 15:33:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085677084] [2021-06-05 15:33:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:33:20,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:20,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085677084] [2021-06-05 15:33:20,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085677084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:20,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212624648] [2021-06-05 15:33:20,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:33:20,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:20,440 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 7 [2021-06-05 15:33:20,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:20,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:20,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:20,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 15:33:20,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:20,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:20,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:20,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:20,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 15:33:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 15:33:20,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212624648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:20,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:20,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 15:33:20,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360489900] [2021-06-05 15:33:20,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:33:20,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:20,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:33:20,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:33:20,505 INFO L87 Difference]: Start difference. First operand 22864 states and 70944 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:21,084 INFO L93 Difference]: Finished difference Result 41349 states and 126699 transitions. [2021-06-05 15:33:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:33:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:21,146 INFO L225 Difference]: With dead ends: 41349 [2021-06-05 15:33:21,147 INFO L226 Difference]: Without dead ends: 41323 [2021-06-05 15:33:21,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:33:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41323 states. [2021-06-05 15:33:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41323 to 22913. [2021-06-05 15:33:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 22912 states have (on average 3.0903456703910615) internal successors, (70806), 22912 states have internal predecessors, (70806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 70806 transitions. [2021-06-05 15:33:21,710 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 70806 transitions. Word has length 45 [2021-06-05 15:33:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:21,710 INFO L482 AbstractCegarLoop]: Abstraction has 22913 states and 70806 transitions. [2021-06-05 15:33:21,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 70806 transitions. [2021-06-05 15:33:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:21,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:21,738 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:21,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:21,939 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:21,939 INFO L82 PathProgramCache]: Analyzing trace with hash 990578203, now seen corresponding path program 152 times [2021-06-05 15:33:21,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:21,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121484870] [2021-06-05 15:33:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:22,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121484870] [2021-06-05 15:33:22,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121484870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:22,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343816831] [2021-06-05 15:33:22,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:22,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:22,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:33:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:22,156 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 7 [2021-06-05 15:33:22,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:22,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:22,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:22,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:10 [2021-06-05 15:33:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:22,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:33:22,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:22,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:22,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:22,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 15:33:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:22,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343816831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:22,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:22,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:33:22,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174570531] [2021-06-05 15:33:22,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:33:22,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:33:22,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:33:22,323 INFO L87 Difference]: Start difference. First operand 22913 states and 70806 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:23,185 INFO L93 Difference]: Finished difference Result 45655 states and 139694 transitions. [2021-06-05 15:33:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:33:23,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:23,247 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 15:33:23,247 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 15:33:23,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:33:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 15:33:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 23273. [2021-06-05 15:33:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23273 states, 23272 states have (on average 3.08903403231351) internal successors, (71888), 23272 states have internal predecessors, (71888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:23,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23273 states to 23273 states and 71888 transitions. [2021-06-05 15:33:23,732 INFO L78 Accepts]: Start accepts. Automaton has 23273 states and 71888 transitions. Word has length 45 [2021-06-05 15:33:23,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:23,732 INFO L482 AbstractCegarLoop]: Abstraction has 23273 states and 71888 transitions. [2021-06-05 15:33:23,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 23273 states and 71888 transitions. [2021-06-05 15:33:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:23,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:23,758 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:23,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 15:33:23,958 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2073054145, now seen corresponding path program 153 times [2021-06-05 15:33:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:23,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190416373] [2021-06-05 15:33:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:24,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:24,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190416373] [2021-06-05 15:33:24,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190416373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:24,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742991042] [2021-06-05 15:33:24,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:24,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:33:24,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:33:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:24,200 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 15:33:24,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:24,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:24,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:24,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:24,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 15:33:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:33:24,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:24,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:24,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:24,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 15:33:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742991042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:24,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:24,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 15:33:24,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785688063] [2021-06-05 15:33:24,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:33:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:33:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:33:24,404 INFO L87 Difference]: Start difference. First operand 23273 states and 71888 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:26,082 INFO L93 Difference]: Finished difference Result 52888 states and 162151 transitions. [2021-06-05 15:33:26,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:33:26,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:26,175 INFO L225 Difference]: With dead ends: 52888 [2021-06-05 15:33:26,176 INFO L226 Difference]: Without dead ends: 52888 [2021-06-05 15:33:26,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 989.8ms TimeCoverageRelationStatistics Valid=612, Invalid=3810, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:33:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52888 states. [2021-06-05 15:33:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52888 to 28583. [2021-06-05 15:33:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28583 states, 28582 states have (on average 3.1288923098453574) internal successors, (89430), 28582 states have internal predecessors, (89430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28583 states to 28583 states and 89430 transitions. [2021-06-05 15:33:26,860 INFO L78 Accepts]: Start accepts. Automaton has 28583 states and 89430 transitions. Word has length 45 [2021-06-05 15:33:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:26,861 INFO L482 AbstractCegarLoop]: Abstraction has 28583 states and 89430 transitions. [2021-06-05 15:33:26,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:26,861 INFO L276 IsEmpty]: Start isEmpty. Operand 28583 states and 89430 transitions. [2021-06-05 15:33:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:33:26,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:26,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:27,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:27,091 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:27,092 INFO L82 PathProgramCache]: Analyzing trace with hash -568576037, now seen corresponding path program 154 times [2021-06-05 15:33:27,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:27,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199622314] [2021-06-05 15:33:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:27,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199622314] [2021-06-05 15:33:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199622314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934179631] [2021-06-05 15:33:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:27,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:33:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:33:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:27,265 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 7 [2021-06-05 15:33:27,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:27,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:27,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:27,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:14 [2021-06-05 15:33:27,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 15:33:27,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:27,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:27,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:27,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 15:33:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 15:33:27,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934179631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:27,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:27,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:33:27,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702802107] [2021-06-05 15:33:27,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:33:27,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:27,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:33:27,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:33:27,403 INFO L87 Difference]: Start difference. First operand 28583 states and 89430 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:28,146 INFO L93 Difference]: Finished difference Result 42516 states and 131719 transitions. [2021-06-05 15:33:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:33:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:33:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:28,213 INFO L225 Difference]: With dead ends: 42516 [2021-06-05 15:33:28,213 INFO L226 Difference]: Without dead ends: 42516 [2021-06-05 15:33:28,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:33:28,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42516 states. [2021-06-05 15:33:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42516 to 29181. [2021-06-05 15:33:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29181 states, 29180 states have (on average 3.1281014393420152) internal successors, (91278), 29180 states have internal predecessors, (91278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29181 states to 29181 states and 91278 transitions. [2021-06-05 15:33:28,871 INFO L78 Accepts]: Start accepts. Automaton has 29181 states and 91278 transitions. Word has length 45 [2021-06-05 15:33:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:28,871 INFO L482 AbstractCegarLoop]: Abstraction has 29181 states and 91278 transitions. [2021-06-05 15:33:28,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 29181 states and 91278 transitions. [2021-06-05 15:33:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:33:28,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:28,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:29,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 15:33:29,097 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:29,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1260994688, now seen corresponding path program 155 times [2021-06-05 15:33:29,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:29,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828993843] [2021-06-05 15:33:29,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:29,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828993843] [2021-06-05 15:33:29,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828993843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:29,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457898469] [2021-06-05 15:33:29,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:29,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:33:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:29,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:33:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:30,850 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:30,850 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 64 treesize of output 36 [2021-06-05 15:33:30,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:30,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:30,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:30,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:44 [2021-06-05 15:33:30,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:33:30,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:30,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:33:30,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 15:33:30,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:31,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:31,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:31,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:17 [2021-06-05 15:33:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:31,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457898469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:31,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:31,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 51 [2021-06-05 15:33:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063009755] [2021-06-05 15:33:31,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 15:33:31,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 15:33:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2444, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:33:31,126 INFO L87 Difference]: Start difference. First operand 29181 states and 91278 transitions. Second operand has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:37,118 INFO L93 Difference]: Finished difference Result 38093 states and 116808 transitions. [2021-06-05 15:33:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:33:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:33:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:37,183 INFO L225 Difference]: With dead ends: 38093 [2021-06-05 15:33:37,183 INFO L226 Difference]: Without dead ends: 37939 [2021-06-05 15:33:37,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 4901.0ms TimeCoverageRelationStatistics Valid=1187, Invalid=13093, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 15:33:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37939 states. [2021-06-05 15:33:37,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37939 to 30032. [2021-06-05 15:33:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30032 states, 30031 states have (on average 3.11737870866771) internal successors, (93618), 30031 states have internal predecessors, (93618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:37,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30032 states to 30032 states and 93618 transitions. [2021-06-05 15:33:37,673 INFO L78 Accepts]: Start accepts. Automaton has 30032 states and 93618 transitions. Word has length 49 [2021-06-05 15:33:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:37,673 INFO L482 AbstractCegarLoop]: Abstraction has 30032 states and 93618 transitions. [2021-06-05 15:33:37,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:37,673 INFO L276 IsEmpty]: Start isEmpty. Operand 30032 states and 93618 transitions. [2021-06-05 15:33:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:33:37,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:37,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:37,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:37,902 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:37,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:37,902 INFO L82 PathProgramCache]: Analyzing trace with hash 253154590, now seen corresponding path program 156 times [2021-06-05 15:33:37,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:37,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936488193] [2021-06-05 15:33:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:38,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:38,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936488193] [2021-06-05 15:33:38,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936488193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:38,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698898226] [2021-06-05 15:33:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:38,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:33:38,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:33:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:39,575 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:39,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-06-05 15:33:39,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:39,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:39,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:39,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:57 [2021-06-05 15:33:39,762 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:39,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 31 [2021-06-05 15:33:39,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:39,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:39,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:39,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 15:33:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:39,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698898226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:39,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:39,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 15:33:39,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987195915] [2021-06-05 15:33:39,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:33:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:33:39,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:33:39,913 INFO L87 Difference]: Start difference. First operand 30032 states and 93618 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:45,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:45,311 INFO L93 Difference]: Finished difference Result 38512 states and 118020 transitions. [2021-06-05 15:33:45,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:33:45,312 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:33:45,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:45,370 INFO L225 Difference]: With dead ends: 38512 [2021-06-05 15:33:45,370 INFO L226 Difference]: Without dead ends: 38358 [2021-06-05 15:33:45,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 4594.2ms TimeCoverageRelationStatistics Valid=880, Invalid=10250, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 15:33:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38358 states. [2021-06-05 15:33:45,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38358 to 30098. [2021-06-05 15:33:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30098 states, 30097 states have (on average 3.1170880818686246) internal successors, (93815), 30097 states have internal predecessors, (93815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30098 states to 30098 states and 93815 transitions. [2021-06-05 15:33:45,912 INFO L78 Accepts]: Start accepts. Automaton has 30098 states and 93815 transitions. Word has length 49 [2021-06-05 15:33:45,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:45,912 INFO L482 AbstractCegarLoop]: Abstraction has 30098 states and 93815 transitions. [2021-06-05 15:33:45,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:45,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30098 states and 93815 transitions. [2021-06-05 15:33:45,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:33:45,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:45,938 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:46,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:46,139 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:46,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:46,139 INFO L82 PathProgramCache]: Analyzing trace with hash -175606438, now seen corresponding path program 157 times [2021-06-05 15:33:46,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:46,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832371594] [2021-06-05 15:33:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:46,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832371594] [2021-06-05 15:33:46,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832371594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:46,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720824686] [2021-06-05 15:33:46,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:33:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:47,820 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-05 15:33:47,833 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:47,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 15:33:47,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:47,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:47,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:47,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 15:33:48,201 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:48,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 26 [2021-06-05 15:33:48,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:48,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:48,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:48,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 15:33:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:48,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720824686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:48,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:48,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 15:33:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051250866] [2021-06-05 15:33:48,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 15:33:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 15:33:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:33:48,492 INFO L87 Difference]: Start difference. First operand 30098 states and 93815 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:55,991 INFO L93 Difference]: Finished difference Result 40431 states and 123594 transitions. [2021-06-05 15:33:55,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 15:33:55,991 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:33:55,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:56,051 INFO L225 Difference]: With dead ends: 40431 [2021-06-05 15:33:56,051 INFO L226 Difference]: Without dead ends: 40212 [2021-06-05 15:33:56,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 6027.6ms TimeCoverageRelationStatistics Valid=1040, Invalid=14212, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 15:33:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40212 states. [2021-06-05 15:33:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40212 to 30553. [2021-06-05 15:33:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30553 states, 30552 states have (on average 3.1129549620319454) internal successors, (95107), 30552 states have internal predecessors, (95107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30553 states to 30553 states and 95107 transitions. [2021-06-05 15:33:56,639 INFO L78 Accepts]: Start accepts. Automaton has 30553 states and 95107 transitions. Word has length 49 [2021-06-05 15:33:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:56,639 INFO L482 AbstractCegarLoop]: Abstraction has 30553 states and 95107 transitions. [2021-06-05 15:33:56,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 30553 states and 95107 transitions. [2021-06-05 15:33:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:33:56,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:56,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:56,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:56,873 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1520699802, now seen corresponding path program 158 times [2021-06-05 15:33:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241491151] [2021-06-05 15:33:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:57,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241491151] [2021-06-05 15:33:57,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241491151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916843214] [2021-06-05 15:33:57,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:57,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:57,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:33:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:58,174 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:58,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 15:33:58,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:58,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:58,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:58,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 15:33:58,343 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:33:58,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 28 [2021-06-05 15:33:58,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:33:58,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:33:58,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:33:58,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:17 [2021-06-05 15:33:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:58,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916843214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:58,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:58,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 15:33:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668972334] [2021-06-05 15:33:58,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:33:58,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:58,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:33:58,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:33:58,696 INFO L87 Difference]: Start difference. First operand 30553 states and 95107 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:01,804 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-05 15:34:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:02,845 INFO L93 Difference]: Finished difference Result 31964 states and 99056 transitions. [2021-06-05 15:34:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:34:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:02,894 INFO L225 Difference]: With dead ends: 31964 [2021-06-05 15:34:02,894 INFO L226 Difference]: Without dead ends: 31798 [2021-06-05 15:34:02,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2975.4ms TimeCoverageRelationStatistics Valid=302, Invalid=5550, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:34:02,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31798 states. [2021-06-05 15:34:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31798 to 30683. [2021-06-05 15:34:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30683 states, 30682 states have (on average 3.1108793429372272) internal successors, (95448), 30682 states have internal predecessors, (95448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30683 states to 30683 states and 95448 transitions. [2021-06-05 15:34:03,317 INFO L78 Accepts]: Start accepts. Automaton has 30683 states and 95448 transitions. Word has length 49 [2021-06-05 15:34:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:03,317 INFO L482 AbstractCegarLoop]: Abstraction has 30683 states and 95448 transitions. [2021-06-05 15:34:03,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 30683 states and 95448 transitions. [2021-06-05 15:34:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:03,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:03,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:03,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 15:34:03,544 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1919970444, now seen corresponding path program 159 times [2021-06-05 15:34:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:03,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440881850] [2021-06-05 15:34:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:04,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:04,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440881850] [2021-06-05 15:34:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440881850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:04,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468001468] [2021-06-05 15:34:04,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:04,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:34:04,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:34:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:05,003 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:05,003 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 48 treesize of output 28 [2021-06-05 15:34:05,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:05,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:05,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:05,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 15:34:05,300 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:05,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 15:34:05,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:05,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:05,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:05,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 15:34:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:05,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468001468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:05,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:05,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 15:34:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906826039] [2021-06-05 15:34:05,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 15:34:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 15:34:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2605, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:34:05,565 INFO L87 Difference]: Start difference. First operand 30683 states and 95448 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:12,132 INFO L93 Difference]: Finished difference Result 40926 states and 125101 transitions. [2021-06-05 15:34:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 15:34:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:12,192 INFO L225 Difference]: With dead ends: 40926 [2021-06-05 15:34:12,192 INFO L226 Difference]: Without dead ends: 40707 [2021-06-05 15:34:12,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 5250.8ms TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 15:34:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40707 states. [2021-06-05 15:34:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40707 to 30659. [2021-06-05 15:34:12,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30659 states, 30658 states have (on average 3.1109987605192773) internal successors, (95377), 30658 states have internal predecessors, (95377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30659 states to 30659 states and 95377 transitions. [2021-06-05 15:34:12,689 INFO L78 Accepts]: Start accepts. Automaton has 30659 states and 95377 transitions. Word has length 49 [2021-06-05 15:34:12,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:12,689 INFO L482 AbstractCegarLoop]: Abstraction has 30659 states and 95377 transitions. [2021-06-05 15:34:12,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30659 states and 95377 transitions. [2021-06-05 15:34:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:12,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:12,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:12,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:34:12,917 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:12,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1339815556, now seen corresponding path program 160 times [2021-06-05 15:34:12,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:12,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875077047] [2021-06-05 15:34:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:13,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875077047] [2021-06-05 15:34:13,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875077047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:13,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022046892] [2021-06-05 15:34:13,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:13,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:34:13,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:13,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:34:13,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:14,372 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:14,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 15:34:14,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:14,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:14,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:14,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 15:34:14,858 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 26 [2021-06-05 15:34:14,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:14,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:14,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:14,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 15:34:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022046892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:15,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 15:34:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247802257] [2021-06-05 15:34:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 15:34:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 15:34:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:34:15,143 INFO L87 Difference]: Start difference. First operand 30659 states and 95377 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:18,440 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-06-05 15:34:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:22,774 INFO L93 Difference]: Finished difference Result 41025 states and 125405 transitions. [2021-06-05 15:34:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 15:34:22,775 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:22,836 INFO L225 Difference]: With dead ends: 41025 [2021-06-05 15:34:22,836 INFO L226 Difference]: Without dead ends: 40806 [2021-06-05 15:34:22,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 5697.6ms TimeCoverageRelationStatistics Valid=937, Invalid=14563, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 15:34:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40806 states. [2021-06-05 15:34:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40806 to 30588. [2021-06-05 15:34:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30588 states, 30587 states have (on average 3.111419884264557) internal successors, (95169), 30587 states have internal predecessors, (95169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30588 states to 30588 states and 95169 transitions. [2021-06-05 15:34:23,354 INFO L78 Accepts]: Start accepts. Automaton has 30588 states and 95169 transitions. Word has length 49 [2021-06-05 15:34:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:23,354 INFO L482 AbstractCegarLoop]: Abstraction has 30588 states and 95169 transitions. [2021-06-05 15:34:23,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30588 states and 95169 transitions. [2021-06-05 15:34:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:23,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:23,381 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:23,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 15:34:23,582 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1177810326, now seen corresponding path program 161 times [2021-06-05 15:34:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:23,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644414502] [2021-06-05 15:34:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:24,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:24,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644414502] [2021-06-05 15:34:24,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644414502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:24,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980419921] [2021-06-05 15:34:24,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:24,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:34:24,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:24,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 15:34:24,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:24,892 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:24,892 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 48 treesize of output 28 [2021-06-05 15:34:24,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:24,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:24,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:24,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 15:34:25,051 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:25,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 21 [2021-06-05 15:34:25,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:25,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:25,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:25,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 15:34:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:25,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980419921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:25,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:25,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2021-06-05 15:34:25,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784890481] [2021-06-05 15:34:25,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:34:25,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:25,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:34:25,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:34:25,271 INFO L87 Difference]: Start difference. First operand 30588 states and 95169 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:26,603 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-06-05 15:34:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:30,576 INFO L93 Difference]: Finished difference Result 41262 states and 126100 transitions. [2021-06-05 15:34:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:34:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:30,755 INFO L225 Difference]: With dead ends: 41262 [2021-06-05 15:34:30,756 INFO L226 Difference]: Without dead ends: 41043 [2021-06-05 15:34:30,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 3786.5ms TimeCoverageRelationStatistics Valid=788, Invalid=10132, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 15:34:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41043 states. [2021-06-05 15:34:31,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41043 to 30615. [2021-06-05 15:34:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 15:34:31,201 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 15:34:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:31,201 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 15:34:31,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 15:34:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:31,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:31,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:31,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:31,429 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1420850730, now seen corresponding path program 162 times [2021-06-05 15:34:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:31,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114837305] [2021-06-05 15:34:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:32,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:32,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114837305] [2021-06-05 15:34:32,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114837305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:32,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379533816] [2021-06-05 15:34:32,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:32,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:34:32,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:32,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:34:32,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:32,845 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:32,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 15:34:32,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:32,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:32,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:32,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:50 [2021-06-05 15:34:33,022 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:33,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 15:34:33,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:33,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:33,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:33,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 15:34:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379533816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:33,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:33,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 15:34:33,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381854859] [2021-06-05 15:34:33,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 15:34:33,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 15:34:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:34:33,166 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:35,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:35,426 INFO L93 Difference]: Finished difference Result 31062 states and 96409 transitions. [2021-06-05 15:34:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:34:35,427 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:35,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:35,476 INFO L225 Difference]: With dead ends: 31062 [2021-06-05 15:34:35,476 INFO L226 Difference]: Without dead ends: 30998 [2021-06-05 15:34:35,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2319.1ms TimeCoverageRelationStatistics Valid=247, Invalid=4175, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:34:35,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30998 states. [2021-06-05 15:34:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30998 to 30615. [2021-06-05 15:34:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 15:34:35,880 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 15:34:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:35,880 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 15:34:35,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 15:34:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:35,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:35,906 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:36,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:36,107 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:36,107 INFO L82 PathProgramCache]: Analyzing trace with hash 660848806, now seen corresponding path program 163 times [2021-06-05 15:34:36,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:36,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958538344] [2021-06-05 15:34:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:36,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:36,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958538344] [2021-06-05 15:34:36,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958538344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:36,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687499708] [2021-06-05 15:34:36,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:34:36,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:37,780 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:37,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 15:34:37,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:37,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:37,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:37,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:54 [2021-06-05 15:34:38,132 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:38,132 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 54 treesize of output 26 [2021-06-05 15:34:38,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:38,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:38,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:38,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 15:34:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:38,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687499708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:38,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:38,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-06-05 15:34:38,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80055317] [2021-06-05 15:34:38,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:34:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:38,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:34:38,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2722, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:34:38,427 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:46,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:46,362 INFO L93 Difference]: Finished difference Result 39956 states and 122260 transitions. [2021-06-05 15:34:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 15:34:46,362 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:46,426 INFO L225 Difference]: With dead ends: 39956 [2021-06-05 15:34:46,426 INFO L226 Difference]: Without dead ends: 39737 [2021-06-05 15:34:46,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 5720.3ms TimeCoverageRelationStatistics Valid=905, Invalid=11977, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 15:34:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39737 states. [2021-06-05 15:34:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39737 to 30942. [2021-06-05 15:34:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30942 states, 30941 states have (on average 3.1104036715038297) internal successors, (96239), 30941 states have internal predecessors, (96239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30942 states to 30942 states and 96239 transitions. [2021-06-05 15:34:47,035 INFO L78 Accepts]: Start accepts. Automaton has 30942 states and 96239 transitions. Word has length 49 [2021-06-05 15:34:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:47,035 INFO L482 AbstractCegarLoop]: Abstraction has 30942 states and 96239 transitions. [2021-06-05 15:34:47,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30942 states and 96239 transitions. [2021-06-05 15:34:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:47,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:47,064 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:47,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:47,264 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:47,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1937812250, now seen corresponding path program 164 times [2021-06-05 15:34:47,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:47,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647709546] [2021-06-05 15:34:47,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:47,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:47,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647709546] [2021-06-05 15:34:47,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647709546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:47,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251652934] [2021-06-05 15:34:47,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:48,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:34:48,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:48,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:34:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:48,637 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-06-05 15:34:48,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:48,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:48,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:48,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:40 [2021-06-05 15:34:48,749 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:48,749 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 41 treesize of output 21 [2021-06-05 15:34:48,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:48,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:48,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:48,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 15:34:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:48,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251652934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:48,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:48,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 47 [2021-06-05 15:34:48,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082587927] [2021-06-05 15:34:48,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:34:48,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:48,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:34:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:34:48,998 INFO L87 Difference]: Start difference. First operand 30942 states and 96239 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:53,472 INFO L93 Difference]: Finished difference Result 32263 states and 99913 transitions. [2021-06-05 15:34:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:34:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:34:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:53,522 INFO L225 Difference]: With dead ends: 32263 [2021-06-05 15:34:53,522 INFO L226 Difference]: Without dead ends: 32112 [2021-06-05 15:34:53,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2957.0ms TimeCoverageRelationStatistics Valid=311, Invalid=5541, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:34:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32112 states. [2021-06-05 15:34:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32112 to 31041. [2021-06-05 15:34:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31041 states, 31040 states have (on average 3.1089884020618554) internal successors, (96503), 31040 states have internal predecessors, (96503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31041 states to 31041 states and 96503 transitions. [2021-06-05 15:34:54,054 INFO L78 Accepts]: Start accepts. Automaton has 31041 states and 96503 transitions. Word has length 49 [2021-06-05 15:34:54,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:54,054 INFO L482 AbstractCegarLoop]: Abstraction has 31041 states and 96503 transitions. [2021-06-05 15:34:54,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 31041 states and 96503 transitions. [2021-06-05 15:34:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:34:54,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:54,081 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:54,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 15:34:54,282 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 232087778, now seen corresponding path program 165 times [2021-06-05 15:34:54,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:54,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946697058] [2021-06-05 15:34:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:55,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946697058] [2021-06-05 15:34:55,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946697058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:55,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148603904] [2021-06-05 15:34:55,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:55,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:34:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:34:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:55,703 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:55,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 15:34:55,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:55,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:55,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:55,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 15:34:56,008 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 15:34:56,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 15:34:56,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:34:56,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:34:56,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:34:56,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 15:34:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:56,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148603904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:56,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:56,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 15:34:56,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236257008] [2021-06-05 15:34:56,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 15:34:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 15:34:56,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:34:56,264 INFO L87 Difference]: Start difference. First operand 31041 states and 96503 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:35:03,634 INFO L93 Difference]: Finished difference Result 41561 states and 126826 transitions. [2021-06-05 15:35:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 15:35:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:35:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:35:03,702 INFO L225 Difference]: With dead ends: 41561 [2021-06-05 15:35:03,702 INFO L226 Difference]: Without dead ends: 41342 [2021-06-05 15:35:03,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 5332.7ms TimeCoverageRelationStatistics Valid=1056, Invalid=13706, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 15:35:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41342 states. [2021-06-05 15:35:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41342 to 31141. [2021-06-05 15:35:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31141 states, 31140 states have (on average 3.1085420680796405) internal successors, (96800), 31140 states have internal predecessors, (96800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31141 states to 31141 states and 96800 transitions. [2021-06-05 15:35:04,237 INFO L78 Accepts]: Start accepts. Automaton has 31141 states and 96800 transitions. Word has length 49 [2021-06-05 15:35:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:35:04,238 INFO L482 AbstractCegarLoop]: Abstraction has 31141 states and 96800 transitions. [2021-06-05 15:35:04,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:35:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 31141 states and 96800 transitions. [2021-06-05 15:35:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:35:04,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:35:04,267 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:35:04,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 15:35:04,467 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:35:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:35:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1928394018, now seen corresponding path program 166 times [2021-06-05 15:35:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:35:04,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210864263] [2021-06-05 15:35:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:35:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:35:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:35:05,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:35:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210864263] [2021-06-05 15:35:05,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210864263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:35:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702534682] [2021-06-05 15:35:05,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:35:05,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:35:05,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:35:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 15:35:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 15:35:05,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 15:35:05,923 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:35:05,924 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:35:05,926 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:35:05,926 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:35:05 BasicIcfg [2021-06-05 15:35:05,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:35:05,926 INFO L168 Benchmark]: Toolchain (without parser) took 742891.16 ms. Allocated memory was 364.9 MB in the beginning and 7.3 GB in the end (delta: 7.0 GB). Free memory was 344.8 MB in the beginning and 4.5 GB in the end (delta: -4.1 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 364.9 MB. Free memory is still 346.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.39 ms. Allocated memory is still 364.9 MB. Free memory was 344.7 MB in the beginning and 343.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 INFO L168 Benchmark]: Boogie Preprocessor took 14.08 ms. Allocated memory is still 364.9 MB. Free memory was 343.2 MB in the beginning and 342.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 INFO L168 Benchmark]: RCFGBuilder took 357.96 ms. Allocated memory is still 364.9 MB. Free memory was 342.1 MB in the beginning and 326.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 INFO L168 Benchmark]: TraceAbstraction took 742487.88 ms. Allocated memory was 364.9 MB in the beginning and 7.3 GB in the end (delta: 7.0 GB). Free memory was 326.1 MB in the beginning and 4.5 GB in the end (delta: -4.1 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.0 GB. [2021-06-05 15:35:05,927 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 0.14 ms. Allocated memory is still 364.9 MB. Free memory is still 346.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.39 ms. Allocated memory is still 364.9 MB. Free memory was 344.7 MB in the beginning and 343.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.08 ms. Allocated memory is still 364.9 MB. Free memory was 343.2 MB in the beginning and 342.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 357.96 ms. Allocated memory is still 364.9 MB. Free memory was 342.1 MB in the beginning and 326.6 MB in the end (delta: 15.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 742487.88 ms. Allocated memory was 364.9 MB in the beginning and 7.3 GB in the end (delta: 7.0 GB). Free memory was 326.1 MB in the beginning and 4.5 GB in the end (delta: -4.1 GB). Peak memory consumption was 2.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 742365.1ms, OverallIterations: 173, TraceHistogramMax: 3, EmptinessCheckTime: 1801.8ms, AutomataDifference: 498741.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32276 SDtfs, 107551 SDslu, 733604 SDs, 0 SdLazy, 519533 SolverSat, 16279 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 197604.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15194 GetRequests, 3723 SyntacticMatches, 65 SemanticMatches, 11406 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193283 ImplicationChecksByTransitivity, 383743.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31141occurred in iteration=172, InterpolantAutomatonStates: 8434, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26829.5ms AutomataMinimizationTime, 172 MinimizatonAttempts, 615594 StatesRemovedByMinimization, 169 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 831.7ms SsaConstructionTime, 2917.2ms SatisfiabilityAnalysisTime, 171688.8ms InterpolantComputationTime, 12880 NumberOfCodeBlocks, 12880 NumberOfCodeBlocksAsserted, 626 NumberOfCheckSat, 12539 ConstructedInterpolants, 110 QuantifiedInterpolants, 290165 SizeOfPredicates, 1772 NumberOfNonLiveVariables, 17621 ConjunctsInSsa, 6974 ConjunctsInUnsatCore, 341 InterpolantComputations, 5 PerfectInterpolantSequences, 354/5445 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