/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:32:43,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:32:43,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:32:43,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:32:43,556 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 19:32:43,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:32:43,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:32:43,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:32:43,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:32:43,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:32:43,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:32:43,584 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:32:43,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:32:43,584 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:32:43,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:32:43,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:32:43,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:32:43,586 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:32:43,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:32:43,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:32:43,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:32:43,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:32:43,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:32:43,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:32:43,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:32:43,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:32:43,587 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:32:43,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:32:43,587 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:32:43,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:32:43,588 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:32:43,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:32:43,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:32:43,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:32:43,863 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:32:43,864 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:32:43,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-08-12 19:32:43,865 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-08-12 19:32:43,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:32:43,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:32:43,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:32:43,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:32:43,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:32:43,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,917 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:32:43,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:32:43,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:32:43,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:32:43,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/1) ... [2021-08-12 19:32:43,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:32:43,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:32:43,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:32:43,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:32:43,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (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 [2021-08-12 19:32:43,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:32:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:32:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:32:43,982 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:32:43,982 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:32:43,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:32:43,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:32:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:32:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:32:43,983 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:32:43,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:32:43,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:32:43,984 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:32:44,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:32:44,164 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-12 19:32:44,165 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:32:44 BoogieIcfgContainer [2021-08-12 19:32:44,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:32:44,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:32:44,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:32:44,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:32:44,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:32:43" (1/2) ... [2021-08-12 19:32:44,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3846fab7 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:32:44, skipping insertion in model container [2021-08-12 19:32:44,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:32:44" (2/2) ... [2021-08-12 19:32:44,171 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-08-12 19:32:44,175 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:32:44,175 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:32:44,176 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:32:44,234 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-12 19:32:44,249 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-12 19:32:44,263 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:32:44,264 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:32:44,264 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:32:44,264 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:32:44,264 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:32:44,264 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:32:44,264 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:32:44,264 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:32:44,270 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-08-12 19:32:44,290 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:32:44,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:44,300 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:44,300 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -718559117, now seen corresponding path program 1 times [2021-08-12 19:32:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598725524] [2021-08-12 19:32:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598725524] [2021-08-12 19:32:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598725524] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:32:44,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:32:44,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:32:44,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769906836] [2021-08-12 19:32:44,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:32:44,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:44,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:32:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:32:44,409 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:44,497 INFO L93 Difference]: Finished difference Result 226 states and 551 transitions. [2021-08-12 19:32:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:32:44,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:32:44,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:44,510 INFO L225 Difference]: With dead ends: 226 [2021-08-12 19:32:44,510 INFO L226 Difference]: Without dead ends: 109 [2021-08-12 19:32:44,513 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:32:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-12 19:32:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-08-12 19:32:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-08-12 19:32:44,558 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-08-12 19:32:44,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:44,561 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-08-12 19:32:44,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-08-12 19:32:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:32:44,565 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:44,565 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:32:44,565 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:44,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:44,568 INFO L82 PathProgramCache]: Analyzing trace with hash -123901407, now seen corresponding path program 2 times [2021-08-12 19:32:44,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:44,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077299969] [2021-08-12 19:32:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:44,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:44,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077299969] [2021-08-12 19:32:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077299969] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:32:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:32:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:32:44,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24526449] [2021-08-12 19:32:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:32:44,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:44,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:32:44,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:32:44,627 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:44,691 INFO L93 Difference]: Finished difference Result 219 states and 510 transitions. [2021-08-12 19:32:44,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:32:44,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:32:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:44,694 INFO L225 Difference]: With dead ends: 219 [2021-08-12 19:32:44,694 INFO L226 Difference]: Without dead ends: 142 [2021-08-12 19:32:44,695 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:32:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-12 19:32:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-08-12 19:32:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-08-12 19:32:44,703 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-08-12 19:32:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:44,703 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-08-12 19:32:44,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-08-12 19:32:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-12 19:32:44,704 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:44,705 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:44,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:32:44,705 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1960072514, now seen corresponding path program 1 times [2021-08-12 19:32:44,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:44,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125550133] [2021-08-12 19:32:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:44,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:44,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125550133] [2021-08-12 19:32:44,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125550133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:32:44,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:32:44,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:32:44,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905728658] [2021-08-12 19:32:44,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:32:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:32:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:32:44,727 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:44,741 INFO L93 Difference]: Finished difference Result 273 states and 642 transitions. [2021-08-12 19:32:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:32:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-12 19:32:44,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:44,743 INFO L225 Difference]: With dead ends: 273 [2021-08-12 19:32:44,743 INFO L226 Difference]: Without dead ends: 152 [2021-08-12 19:32:44,743 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:32:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-12 19:32:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-08-12 19:32:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-08-12 19:32:44,750 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-08-12 19:32:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:44,750 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-08-12 19:32:44,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-08-12 19:32:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:32:44,752 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:44,752 INFO L550 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] [2021-08-12 19:32:44,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 19:32:44,752 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:44,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:44,752 INFO L82 PathProgramCache]: Analyzing trace with hash -480736564, now seen corresponding path program 1 times [2021-08-12 19:32:44,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:44,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109368564] [2021-08-12 19:32:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:44,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109368564] [2021-08-12 19:32:44,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109368564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:44,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636489083] [2021-08-12 19:32:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 19:32:44,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:45,145 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 [2021-08-12 19:32:45,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:45,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:45,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:45,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-08-12 19:32:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:45,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636489083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:45,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:45,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:32:45,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011071053] [2021-08-12 19:32:45,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:32:45,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:32:45,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:32:45,244 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:45,464 INFO L93 Difference]: Finished difference Result 331 states and 794 transitions. [2021-08-12 19:32:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:32:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:32:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:45,466 INFO L225 Difference]: With dead ends: 331 [2021-08-12 19:32:45,466 INFO L226 Difference]: Without dead ends: 218 [2021-08-12 19:32:45,467 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:32:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-12 19:32:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-08-12 19:32:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-08-12 19:32:45,480 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-08-12 19:32:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:45,480 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-08-12 19:32:45,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-08-12 19:32:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-12 19:32:45,481 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:45,481 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:32:45,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:45,705 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1527967927, now seen corresponding path program 2 times [2021-08-12 19:32:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:45,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828312743] [2021-08-12 19:32:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:45,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:45,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828312743] [2021-08-12 19:32:45,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828312743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:45,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812372856] [2021-08-12 19:32:45,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:45,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:32:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:32:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812372856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-12 19:32:45,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376484191] [2021-08-12 19:32:45,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:32:45,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:32:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:32:45,844 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:45,904 INFO L93 Difference]: Finished difference Result 605 states and 1437 transitions. [2021-08-12 19:32:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:32:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-12 19:32:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:45,908 INFO L225 Difference]: With dead ends: 605 [2021-08-12 19:32:45,908 INFO L226 Difference]: Without dead ends: 454 [2021-08-12 19:32:45,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:32:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-12 19:32:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-08-12 19:32:45,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-08-12 19:32:45,922 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-08-12 19:32:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:45,922 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-08-12 19:32:45,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:45,923 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-08-12 19:32:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:45,923 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:45,924 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:32:46,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:46,133 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash 703493603, now seen corresponding path program 3 times [2021-08-12 19:32:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:46,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990650922] [2021-08-12 19:32:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:46,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:46,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990650922] [2021-08-12 19:32:46,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990650922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:46,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507352591] [2021-08-12 19:32:46,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:46,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:32:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:32:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:46,638 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:32:46,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-12 19:32:46,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:46,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:46,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:46,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:32:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507352591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:46,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:46,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:32:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599974183] [2021-08-12 19:32:46,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:32:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:32:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:32:46,740 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:48,843 INFO L93 Difference]: Finished difference Result 1749 states and 4456 transitions. [2021-08-12 19:32:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-12 19:32:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:48,850 INFO L225 Difference]: With dead ends: 1749 [2021-08-12 19:32:48,850 INFO L226 Difference]: Without dead ends: 1181 [2021-08-12 19:32:48,854 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1669.0ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-08-12 19:32:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-08-12 19:32:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-08-12 19:32:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-08-12 19:32:48,880 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-08-12 19:32:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:48,880 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-08-12 19:32:48,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-08-12 19:32:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:48,882 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:48,883 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:32:49,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:49,097 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:49,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1642327051, now seen corresponding path program 4 times [2021-08-12 19:32:49,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:49,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634294801] [2021-08-12 19:32:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:49,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:49,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634294801] [2021-08-12 19:32:49,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634294801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:49,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037122949] [2021-08-12 19:32:49,304 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 [2021-08-12 19:32:49,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:32:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:49,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:32:49,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:49,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:32:49,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-12 19:32:49,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:49,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:49,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:49,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:32:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:49,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037122949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:49,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:49,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:32:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892144602] [2021-08-12 19:32:49,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:32:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:32:49,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:32:49,580 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:51,288 INFO L93 Difference]: Finished difference Result 1322 states and 3217 transitions. [2021-08-12 19:32:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:32:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:51,293 INFO L225 Difference]: With dead ends: 1322 [2021-08-12 19:32:51,293 INFO L226 Difference]: Without dead ends: 1200 [2021-08-12 19:32:51,295 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1373.5ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-08-12 19:32:51,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-08-12 19:32:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-08-12 19:32:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-08-12 19:32:51,318 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-08-12 19:32:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:51,319 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-08-12 19:32:51,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-08-12 19:32:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:51,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:51,320 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:32:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:51,520 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1488152547, now seen corresponding path program 5 times [2021-08-12 19:32:51,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:51,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356914864] [2021-08-12 19:32:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:51,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356914864] [2021-08-12 19:32:51,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356914864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:51,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744845077] [2021-08-12 19:32:51,670 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 [2021-08-12 19:32:51,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:32:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 19:32:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:51,894 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:32:51,895 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 25 treesize of output 13 [2021-08-12 19:32:51,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:51,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:51,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:51,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:32:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744845077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:51,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:51,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:32:51,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143255643] [2021-08-12 19:32:51,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:32:51,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:32:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:32:51,951 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:54,374 INFO L93 Difference]: Finished difference Result 3457 states and 8661 transitions. [2021-08-12 19:32:54,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-12 19:32:54,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:54,387 INFO L225 Difference]: With dead ends: 3457 [2021-08-12 19:32:54,387 INFO L226 Difference]: Without dead ends: 2445 [2021-08-12 19:32:54,390 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1804.0ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-08-12 19:32:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-08-12 19:32:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-08-12 19:32:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-08-12 19:32:54,431 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-08-12 19:32:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:54,432 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-08-12 19:32:54,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:54,433 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-08-12 19:32:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:54,433 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:54,433 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:32:54,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:32:54,637 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:54,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1925512583, now seen corresponding path program 6 times [2021-08-12 19:32:54,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:54,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998474679] [2021-08-12 19:32:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:32:54,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:54,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998474679] [2021-08-12 19:32:54,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998474679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:54,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769807065] [2021-08-12 19:32:54,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:54,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:32:54,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:32:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:32:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:55,021 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:32:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-12 19:32:55,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:55,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:55,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:55,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:32:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:55,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769807065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:55,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:55,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-12 19:32:55,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316463100] [2021-08-12 19:32:55,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:32:55,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:32:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:32:55,077 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:57,397 INFO L93 Difference]: Finished difference Result 2526 states and 6227 transitions. [2021-08-12 19:32:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-12 19:32:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:57,406 INFO L225 Difference]: With dead ends: 2526 [2021-08-12 19:32:57,406 INFO L226 Difference]: Without dead ends: 2112 [2021-08-12 19:32:57,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1735.3ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-08-12 19:32:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-12 19:32:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-08-12 19:32:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-08-12 19:32:57,445 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-08-12 19:32:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:32:57,445 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-08-12 19:32:57,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-08-12 19:32:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:32:57,446 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:32:57,446 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:32:57,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:32:57,667 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:32:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:32:57,667 INFO L82 PathProgramCache]: Analyzing trace with hash -879696673, now seen corresponding path program 7 times [2021-08-12 19:32:57,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:32:57,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383873944] [2021-08-12 19:32:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:32:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:57,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:32:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383873944] [2021-08-12 19:32:57,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383873944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505767092] [2021-08-12 19:32:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:32:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:32:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:32:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:32:58,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:32:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-12 19:32:58,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:32:58,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:32:58,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:32:58,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:32:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:32:58,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505767092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:32:58,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:32:58,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:32:58,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503158043] [2021-08-12 19:32:58,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:32:58,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:32:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:32:58,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:32:58,143 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:32:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:32:59,978 INFO L93 Difference]: Finished difference Result 2318 states and 5883 transitions. [2021-08-12 19:32:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-12 19:32:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:32:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:32:59,985 INFO L225 Difference]: With dead ends: 2318 [2021-08-12 19:32:59,985 INFO L226 Difference]: Without dead ends: 1584 [2021-08-12 19:32:59,987 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1443.7ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-08-12 19:32:59,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-08-12 19:33:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-08-12 19:33:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-08-12 19:33:00,024 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-08-12 19:33:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:00,024 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-08-12 19:33:00,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-08-12 19:33:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:00,026 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:00,026 INFO L550 BasicCegarLoop]: trace histogram [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] [2021-08-12 19:33:00,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:00,233 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash 320665773, now seen corresponding path program 8 times [2021-08-12 19:33:00,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:00,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066726657] [2021-08-12 19:33:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:00,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066726657] [2021-08-12 19:33:00,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066726657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:00,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4399521] [2021-08-12 19:33:00,380 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 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 [2021-08-12 19:33:00,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:00,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:00,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 19:33:00,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:00,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:33:00,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-08-12 19:33:00,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:00,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:00,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:00,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-08-12 19:33:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:00,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4399521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:00,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:00,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-12 19:33:00,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265861977] [2021-08-12 19:33:00,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:33:00,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:00,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:33:00,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:33:00,647 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:02,330 INFO L93 Difference]: Finished difference Result 2361 states and 5838 transitions. [2021-08-12 19:33:02,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-12 19:33:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:33:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:02,337 INFO L225 Difference]: With dead ends: 2361 [2021-08-12 19:33:02,337 INFO L226 Difference]: Without dead ends: 1883 [2021-08-12 19:33:02,339 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-08-12 19:33:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-08-12 19:33:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-08-12 19:33:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-08-12 19:33:02,376 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-08-12 19:33:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:02,376 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-08-12 19:33:02,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,376 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-08-12 19:33:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-12 19:33:02,377 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:02,377 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:02,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:33:02,593 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:02,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2067503680, now seen corresponding path program 9 times [2021-08-12 19:33:02,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:02,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302651588] [2021-08-12 19:33:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:02,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302651588] [2021-08-12 19:33:02,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302651588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:02,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693912920] [2021-08-12 19:33:02,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:33:02,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:33:02,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:02,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:33:02,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:02,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693912920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:02,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:02,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 19:33:02,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399728107] [2021-08-12 19:33:02,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:33:02,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:02,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:33:02,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:02,699 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:02,836 INFO L93 Difference]: Finished difference Result 1271 states and 3085 transitions. [2021-08-12 19:33:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:33:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-12 19:33:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:02,847 INFO L225 Difference]: With dead ends: 1271 [2021-08-12 19:33:02,847 INFO L226 Difference]: Without dead ends: 1105 [2021-08-12 19:33:02,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:02,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-08-12 19:33:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-08-12 19:33:02,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-08-12 19:33:02,912 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-08-12 19:33:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:02,912 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-08-12 19:33:02,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-08-12 19:33:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:02,913 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:02,913 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:03,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 19:33:03,127 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:03,127 INFO L82 PathProgramCache]: Analyzing trace with hash 774999660, now seen corresponding path program 10 times [2021-08-12 19:33:03,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:03,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630328617] [2021-08-12 19:33:03,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:03,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:03,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630328617] [2021-08-12 19:33:03,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630328617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:03,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007542302] [2021-08-12 19:33:03,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:03,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:33:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:03,674 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:33:03,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:33:03,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:03,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:03,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:03,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:33:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:03,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007542302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:03,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:03,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:33:03,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607657947] [2021-08-12 19:33:03,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:33:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:33:03,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:33:03,762 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:08,359 INFO L93 Difference]: Finished difference Result 4051 states and 10141 transitions. [2021-08-12 19:33:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-12 19:33:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:33:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:08,373 INFO L225 Difference]: With dead ends: 4051 [2021-08-12 19:33:08,373 INFO L226 Difference]: Without dead ends: 3406 [2021-08-12 19:33:08,378 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3243.8ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-08-12 19:33:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-08-12 19:33:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-08-12 19:33:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-08-12 19:33:08,492 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-08-12 19:33:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:08,492 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-08-12 19:33:08,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-08-12 19:33:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:08,493 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:08,493 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:08,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:33:08,701 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1677954198, now seen corresponding path program 11 times [2021-08-12 19:33:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274934168] [2021-08-12 19:33:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:08,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274934168] [2021-08-12 19:33:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274934168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130634941] [2021-08-12 19:33:08,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:08,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:33:08,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:33:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:09,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:09,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:09,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:09,348 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 38 treesize of output 18 [2021-08-12 19:33:09,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:09,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:09,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:09,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-08-12 19:33:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:09,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130634941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:09,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:09,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:33:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818201457] [2021-08-12 19:33:09,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:33:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:33:09,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:33:09,427 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:33:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:16,358 INFO L93 Difference]: Finished difference Result 6801 states and 17164 transitions. [2021-08-12 19:33:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-08-12 19:33:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-12 19:33:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:16,377 INFO L225 Difference]: With dead ends: 6801 [2021-08-12 19:33:16,377 INFO L226 Difference]: Without dead ends: 5574 [2021-08-12 19:33:16,380 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 4325.8ms TimeCoverageRelationStatistics Valid=3398, Invalid=18064, Unknown=0, NotChecked=0, Total=21462 [2021-08-12 19:33:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-08-12 19:33:16,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 1099. [2021-08-12 19:33:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.517304189435337) internal successors, (2764), 1098 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2764 transitions. [2021-08-12 19:33:16,519 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2764 transitions. Word has length 37 [2021-08-12 19:33:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:16,519 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 2764 transitions. [2021-08-12 19:33:16,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:33:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2764 transitions. [2021-08-12 19:33:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:16,521 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:16,521 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:16,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:16,737 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916204, now seen corresponding path program 12 times [2021-08-12 19:33:16,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:16,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861418417] [2021-08-12 19:33:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:16,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861418417] [2021-08-12 19:33:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861418417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:16,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835808317] [2021-08-12 19:33:16,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:16,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:33:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:33:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:17,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:17,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:17,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:17,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:17,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:17,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-08-12 19:33:17,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:17,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:17,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:17,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:10 [2021-08-12 19:33:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835808317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:17,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:17,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:33:17,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920407866] [2021-08-12 19:33:17,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:33:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:33:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:33:17,606 INFO L87 Difference]: Start difference. First operand 1099 states and 2764 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:33:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:24,556 INFO L93 Difference]: Finished difference Result 5685 states and 14370 transitions. [2021-08-12 19:33:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-08-12 19:33:24,557 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-12 19:33:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:24,567 INFO L225 Difference]: With dead ends: 5685 [2021-08-12 19:33:24,567 INFO L226 Difference]: Without dead ends: 5239 [2021-08-12 19:33:24,569 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 4025.0ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-08-12 19:33:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-08-12 19:33:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 1221. [2021-08-12 19:33:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.533606557377049) internal successors, (3091), 1220 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:24,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3091 transitions. [2021-08-12 19:33:24,751 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3091 transitions. Word has length 37 [2021-08-12 19:33:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:24,751 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3091 transitions. [2021-08-12 19:33:24,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:33:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3091 transitions. [2021-08-12 19:33:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:24,753 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:24,753 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:24,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:24,969 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:24,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:24,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1799631944, now seen corresponding path program 13 times [2021-08-12 19:33:24,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:24,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452959889] [2021-08-12 19:33:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:25,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:25,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452959889] [2021-08-12 19:33:25,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452959889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:25,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486301365] [2021-08-12 19:33:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:33:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:25,505 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:33:25,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:33:25,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:25,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:25,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:25,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:33:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:25,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486301365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:25,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:25,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-12 19:33:25,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23010225] [2021-08-12 19:33:25,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:33:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:33:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:33:25,592 INFO L87 Difference]: Start difference. First operand 1221 states and 3091 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:33,144 INFO L93 Difference]: Finished difference Result 7416 states and 18829 transitions. [2021-08-12 19:33:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-12 19:33:33,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:33:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:33,157 INFO L225 Difference]: With dead ends: 7416 [2021-08-12 19:33:33,158 INFO L226 Difference]: Without dead ends: 6259 [2021-08-12 19:33:33,160 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8391 ImplicationChecksByTransitivity, 3966.2ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-08-12 19:33:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-08-12 19:33:33,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 1453. [2021-08-12 19:33:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.548898071625344) internal successors, (3701), 1452 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3701 transitions. [2021-08-12 19:33:33,392 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3701 transitions. Word has length 37 [2021-08-12 19:33:33,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:33,392 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 3701 transitions. [2021-08-12 19:33:33,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:33,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3701 transitions. [2021-08-12 19:33:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:33,394 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:33,394 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:33,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:33:33,602 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:33,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1710676408, now seen corresponding path program 14 times [2021-08-12 19:33:33,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:33,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249134738] [2021-08-12 19:33:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:33,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249134738] [2021-08-12 19:33:33,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249134738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240495822] [2021-08-12 19:33:33,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:33,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:33,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:33,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:33:33,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:34,150 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:33:34,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:33:34,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:34,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:34,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:34,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:33:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:34,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240495822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:34,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:34,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-12 19:33:34,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905662289] [2021-08-12 19:33:34,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:33:34,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:33:34,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:33:34,216 INFO L87 Difference]: Start difference. First operand 1453 states and 3701 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-12 19:33:43,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:43,004 INFO L93 Difference]: Finished difference Result 9393 states and 23969 transitions. [2021-08-12 19:33:43,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-12 19:33:43,005 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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 37 [2021-08-12 19:33:43,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:43,019 INFO L225 Difference]: With dead ends: 9393 [2021-08-12 19:33:43,019 INFO L226 Difference]: Without dead ends: 8006 [2021-08-12 19:33:43,023 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 3994.4ms TimeCoverageRelationStatistics Valid=3731, Invalid=21709, Unknown=0, NotChecked=0, Total=25440 [2021-08-12 19:33:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-08-12 19:33:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 2053. [2021-08-12 19:33:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.574561403508772) internal successors, (5283), 2052 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5283 transitions. [2021-08-12 19:33:43,387 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5283 transitions. Word has length 37 [2021-08-12 19:33:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:43,388 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5283 transitions. [2021-08-12 19:33:43,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2021-08-12 19:33:43,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5283 transitions. [2021-08-12 19:33:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:43,391 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:43,391 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:43,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:43,592 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1273316372, now seen corresponding path program 15 times [2021-08-12 19:33:43,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:43,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795944654] [2021-08-12 19:33:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:43,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795944654] [2021-08-12 19:33:43,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795944654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:43,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771316016] [2021-08-12 19:33:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:43,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:33:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:44,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:44,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:33:44,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:44,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:44,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:44,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-08-12 19:33:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771316016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:44,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:44,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-12 19:33:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607305280] [2021-08-12 19:33:44,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:33:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:33:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:33:44,236 INFO L87 Difference]: Start difference. First operand 2053 states and 5283 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-12 19:33:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:52,168 INFO L93 Difference]: Finished difference Result 8755 states and 22468 transitions. [2021-08-12 19:33:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-08-12 19:33:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 37 [2021-08-12 19:33:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:52,183 INFO L225 Difference]: With dead ends: 8755 [2021-08-12 19:33:52,183 INFO L226 Difference]: Without dead ends: 7790 [2021-08-12 19:33:52,187 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3108.2ms TimeCoverageRelationStatistics Valid=2541, Invalid=15015, Unknown=0, NotChecked=0, Total=17556 [2021-08-12 19:33:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-08-12 19:33:52,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 2539. [2021-08-12 19:33:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2539 states, 2538 states have (on average 2.602442868400315) internal successors, (6605), 2538 states have internal predecessors, (6605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2539 states to 2539 states and 6605 transitions. [2021-08-12 19:33:52,682 INFO L78 Accepts]: Start accepts. Automaton has 2539 states and 6605 transitions. Word has length 37 [2021-08-12 19:33:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:52,683 INFO L482 AbstractCegarLoop]: Abstraction has 2539 states and 6605 transitions. [2021-08-12 19:33:52,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-12 19:33:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2539 states and 6605 transitions. [2021-08-12 19:33:52,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:33:52,687 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:52,687 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:52,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:52,901 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:52,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1801064030, now seen corresponding path program 16 times [2021-08-12 19:33:52,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:52,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114972289] [2021-08-12 19:33:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:53,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:53,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114972289] [2021-08-12 19:33:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114972289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:53,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937067437] [2021-08-12 19:33:53,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:53,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:33:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:53,482 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:33:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:33:53,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:53,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:53,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:53,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:33:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937067437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:53,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:53,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-12 19:33:53,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335833239] [2021-08-12 19:33:53,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:33:53,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:33:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:33:53,540 INFO L87 Difference]: Start difference. First operand 2539 states and 6605 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:02,263 INFO L93 Difference]: Finished difference Result 9487 states and 24563 transitions. [2021-08-12 19:34:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-12 19:34:02,264 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:02,276 INFO L225 Difference]: With dead ends: 9487 [2021-08-12 19:34:02,276 INFO L226 Difference]: Without dead ends: 8487 [2021-08-12 19:34:02,278 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6032 ImplicationChecksByTransitivity, 3231.5ms TimeCoverageRelationStatistics Valid=2478, Invalid=14552, Unknown=0, NotChecked=0, Total=17030 [2021-08-12 19:34:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8487 states. [2021-08-12 19:34:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8487 to 2847. [2021-08-12 19:34:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.600843288826423) internal successors, (7402), 2846 states have internal predecessors, (7402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 7402 transitions. [2021-08-12 19:34:02,857 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 7402 transitions. Word has length 37 [2021-08-12 19:34:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:02,858 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 7402 transitions. [2021-08-12 19:34:02,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 7402 transitions. [2021-08-12 19:34:02,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:02,861 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:02,862 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:03,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:03,069 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1293540820, now seen corresponding path program 17 times [2021-08-12 19:34:03,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:03,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816423679] [2021-08-12 19:34:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:34:03,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816423679] [2021-08-12 19:34:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816423679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803252763] [2021-08-12 19:34:03,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:03,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:34:03,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-12 19:34:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2021-08-12 19:34:03,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:03,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:03,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:03,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:10 [2021-08-12 19:34:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:03,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803252763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:03,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:03,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 30 [2021-08-12 19:34:03,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907330618] [2021-08-12 19:34:03,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:34:03,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:03,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:34:03,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:34:03,842 INFO L87 Difference]: Start difference. First operand 2847 states and 7402 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-12 19:34:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:12,574 INFO L93 Difference]: Finished difference Result 9209 states and 23672 transitions. [2021-08-12 19:34:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-12 19:34:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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 37 [2021-08-12 19:34:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:12,588 INFO L225 Difference]: With dead ends: 9209 [2021-08-12 19:34:12,588 INFO L226 Difference]: Without dead ends: 8400 [2021-08-12 19:34:12,590 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5244 ImplicationChecksByTransitivity, 2944.2ms TimeCoverageRelationStatistics Valid=2057, Invalid=12463, Unknown=0, NotChecked=0, Total=14520 [2021-08-12 19:34:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8400 states. [2021-08-12 19:34:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8400 to 3079. [2021-08-12 19:34:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.602014294996751) internal successors, (8009), 3078 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8009 transitions. [2021-08-12 19:34:13,262 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8009 transitions. Word has length 37 [2021-08-12 19:34:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:13,262 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8009 transitions. [2021-08-12 19:34:13,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2021-08-12 19:34:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8009 transitions. [2021-08-12 19:34:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:13,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:13,267 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:13,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:34:13,476 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:13,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1590603224, now seen corresponding path program 18 times [2021-08-12 19:34:13,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:13,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619386681] [2021-08-12 19:34:13,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:13,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619386681] [2021-08-12 19:34:13,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619386681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:13,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15452068] [2021-08-12 19:34:13,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:13,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:34:13,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-12 19:34:13,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:14,048 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:34:14,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:34:14,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:14,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:14,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:14,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:34:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:14,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15452068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:14,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:14,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:34:14,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145386932] [2021-08-12 19:34:14,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:34:14,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:14,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:34:14,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:34:14,111 INFO L87 Difference]: Start difference. First operand 3079 states and 8009 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:34:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:23,227 INFO L93 Difference]: Finished difference Result 9489 states and 24438 transitions. [2021-08-12 19:34:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-12 19:34:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-12 19:34:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:23,242 INFO L225 Difference]: With dead ends: 9489 [2021-08-12 19:34:23,242 INFO L226 Difference]: Without dead ends: 8811 [2021-08-12 19:34:23,243 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4494 ImplicationChecksByTransitivity, 2954.8ms TimeCoverageRelationStatistics Valid=2347, Invalid=10993, Unknown=0, NotChecked=0, Total=13340 [2021-08-12 19:34:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8811 states. [2021-08-12 19:34:24,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8811 to 3651. [2021-08-12 19:34:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 3650 states have (on average 2.5695890410958904) internal successors, (9379), 3650 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 9379 transitions. [2021-08-12 19:34:24,071 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 9379 transitions. Word has length 37 [2021-08-12 19:34:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:24,071 INFO L482 AbstractCegarLoop]: Abstraction has 3651 states and 9379 transitions. [2021-08-12 19:34:24,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:34:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 9379 transitions. [2021-08-12 19:34:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:24,076 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:24,076 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:24,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-12 19:34:24,280 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:24,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:24,281 INFO L82 PathProgramCache]: Analyzing trace with hash 49497584, now seen corresponding path program 19 times [2021-08-12 19:34:24,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:24,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082874328] [2021-08-12 19:34:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:24,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:24,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082874328] [2021-08-12 19:34:24,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082874328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:24,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941415405] [2021-08-12 19:34:24,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:34:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:24,829 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:34:24,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:34:24,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:24,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:24,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:24,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:34:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:24,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941415405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:24,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:24,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:34:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719559361] [2021-08-12 19:34:24,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:34:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:34:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:34:24,890 INFO L87 Difference]: Start difference. First operand 3651 states and 9379 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:34,790 INFO L93 Difference]: Finished difference Result 9843 states and 25083 transitions. [2021-08-12 19:34:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-12 19:34:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:34,805 INFO L225 Difference]: With dead ends: 9843 [2021-08-12 19:34:34,805 INFO L226 Difference]: Without dead ends: 9455 [2021-08-12 19:34:34,807 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 2360.2ms TimeCoverageRelationStatistics Valid=1922, Invalid=10068, Unknown=0, NotChecked=0, Total=11990 [2021-08-12 19:34:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-08-12 19:34:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 3907. [2021-08-12 19:34:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 2.5629800307219663) internal successors, (10011), 3906 states have internal predecessors, (10011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 10011 transitions. [2021-08-12 19:34:35,690 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 10011 transitions. Word has length 37 [2021-08-12 19:34:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 10011 transitions. [2021-08-12 19:34:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 10011 transitions. [2021-08-12 19:34:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:35,695 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:35,695 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:35,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:35,895 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1285155348, now seen corresponding path program 20 times [2021-08-12 19:34:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:35,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767951248] [2021-08-12 19:34:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767951248] [2021-08-12 19:34:36,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767951248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402552243] [2021-08-12 19:34:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:36,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:34:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:36,426 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:34:36,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:34:36,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:36,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:36,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:36,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:34:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:36,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402552243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:36,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:36,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-12 19:34:36,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778435347] [2021-08-12 19:34:36,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:34:36,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:34:36,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:34:36,493 INFO L87 Difference]: Start difference. First operand 3907 states and 10011 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:34:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:46,428 INFO L93 Difference]: Finished difference Result 9763 states and 24783 transitions. [2021-08-12 19:34:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-12 19:34:46,429 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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 37 [2021-08-12 19:34:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:46,443 INFO L225 Difference]: With dead ends: 9763 [2021-08-12 19:34:46,443 INFO L226 Difference]: Without dead ends: 9251 [2021-08-12 19:34:46,444 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4463 ImplicationChecksByTransitivity, 2565.9ms TimeCoverageRelationStatistics Valid=2117, Invalid=11455, Unknown=0, NotChecked=0, Total=13572 [2021-08-12 19:34:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9251 states. [2021-08-12 19:34:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9251 to 4183. [2021-08-12 19:34:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.5516499282639886) internal successors, (10671), 4182 states have internal predecessors, (10671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 10671 transitions. [2021-08-12 19:34:47,444 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 10671 transitions. Word has length 37 [2021-08-12 19:34:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:47,444 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 10671 transitions. [2021-08-12 19:34:47,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2021-08-12 19:34:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 10671 transitions. [2021-08-12 19:34:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:47,449 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:47,449 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:47,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:34:47,650 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1568060888, now seen corresponding path program 21 times [2021-08-12 19:34:47,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:47,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416032455] [2021-08-12 19:34:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:34:47,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416032455] [2021-08-12 19:34:47,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416032455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:47,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065115243] [2021-08-12 19:34:47,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:47,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:34:47,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:34:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:48,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-08-12 19:34:48,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:48,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:48,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:48,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-08-12 19:34:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:48,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065115243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:48,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:48,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2021-08-12 19:34:48,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352893901] [2021-08-12 19:34:48,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:34:48,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:34:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:34:48,300 INFO L87 Difference]: Start difference. First operand 4183 states and 10671 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:58,709 INFO L93 Difference]: Finished difference Result 10779 states and 27298 transitions. [2021-08-12 19:34:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-12 19:34:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:58,724 INFO L225 Difference]: With dead ends: 10779 [2021-08-12 19:34:58,725 INFO L226 Difference]: Without dead ends: 9874 [2021-08-12 19:34:58,727 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2461.4ms TimeCoverageRelationStatistics Valid=1896, Invalid=9660, Unknown=0, NotChecked=0, Total=11556 [2021-08-12 19:34:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9874 states. [2021-08-12 19:34:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9874 to 4281. [2021-08-12 19:34:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 2.549299065420561) internal successors, (10911), 4280 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 10911 transitions. [2021-08-12 19:34:59,755 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 10911 transitions. Word has length 37 [2021-08-12 19:34:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:59,755 INFO L482 AbstractCegarLoop]: Abstraction has 4281 states and 10911 transitions. [2021-08-12 19:34:59,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 10911 transitions. [2021-08-12 19:34:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:34:59,760 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:59,760 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:59,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:34:59,979 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash -62441724, now seen corresponding path program 22 times [2021-08-12 19:34:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:59,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844269063] [2021-08-12 19:34:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:35:00,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:00,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844269063] [2021-08-12 19:35:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844269063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271704816] [2021-08-12 19:35:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:00,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:35:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:00,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:35:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:00,498 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:35:00,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:35:00,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:00,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:00,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:00,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:35:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:00,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271704816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:00,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:00,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-12 19:35:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242332856] [2021-08-12 19:35:00,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:35:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:35:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:35:00,595 INFO L87 Difference]: Start difference. First operand 4281 states and 10911 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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) [2021-08-12 19:35:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:14,876 INFO L93 Difference]: Finished difference Result 13750 states and 34783 transitions. [2021-08-12 19:35:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-12 19:35:14,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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 37 [2021-08-12 19:35:14,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:14,899 INFO L225 Difference]: With dead ends: 13750 [2021-08-12 19:35:14,899 INFO L226 Difference]: Without dead ends: 13099 [2021-08-12 19:35:14,901 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 2964.4ms TimeCoverageRelationStatistics Valid=2290, Invalid=13460, Unknown=0, NotChecked=0, Total=15750 [2021-08-12 19:35:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13099 states. [2021-08-12 19:35:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13099 to 4423. [2021-08-12 19:35:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.545002261420172) internal successors, (11254), 4422 states have internal predecessors, (11254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:16,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11254 transitions. [2021-08-12 19:35:16,089 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11254 transitions. Word has length 37 [2021-08-12 19:35:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:16,089 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11254 transitions. [2021-08-12 19:35:16,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 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) [2021-08-12 19:35:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11254 transitions. [2021-08-12 19:35:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-12 19:35:16,095 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:16,095 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:16,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:16,304 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash 722217220, now seen corresponding path program 23 times [2021-08-12 19:35:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:16,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966209232] [2021-08-12 19:35:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:35:16,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966209232] [2021-08-12 19:35:16,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966209232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:16,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37260768] [2021-08-12 19:35:16,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:16,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:35:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-12 19:35:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:16,877 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:35:16,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:35:16,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:16,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:16,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:16,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:35:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37260768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:16,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:16,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-08-12 19:35:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089897117] [2021-08-12 19:35:16,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:35:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:35:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:35:16,951 INFO L87 Difference]: Start difference. First operand 4423 states and 11254 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:32,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:32,476 INFO L93 Difference]: Finished difference Result 14376 states and 36397 transitions. [2021-08-12 19:35:32,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-08-12 19:35:32,476 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:35:32,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:32,501 INFO L225 Difference]: With dead ends: 14376 [2021-08-12 19:35:32,501 INFO L226 Difference]: Without dead ends: 13341 [2021-08-12 19:35:32,504 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7884 ImplicationChecksByTransitivity, 3705.1ms TimeCoverageRelationStatistics Valid=3139, Invalid=17741, Unknown=0, NotChecked=0, Total=20880 [2021-08-12 19:35:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-08-12 19:35:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 4643. [2021-08-12 19:35:33,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.5359758724687635) internal successors, (11772), 4642 states have internal predecessors, (11772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:33,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11772 transitions. [2021-08-12 19:35:33,668 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11772 transitions. Word has length 37 [2021-08-12 19:35:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:33,669 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11772 transitions. [2021-08-12 19:35:33,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11772 transitions. [2021-08-12 19:35:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 19:35:33,675 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:33,675 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:33,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 19:35:33,889 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:33,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:33,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2000668951, now seen corresponding path program 24 times [2021-08-12 19:35:33,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:33,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216122691] [2021-08-12 19:35:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:33,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:33,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216122691] [2021-08-12 19:35:33,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216122691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:33,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128459502] [2021-08-12 19:35:33,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:33,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:35:33,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:33,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:35:33,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:34,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128459502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:34,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:34,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 19:35:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860733822] [2021-08-12 19:35:34,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:35:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:35:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:35:34,031 INFO L87 Difference]: Start difference. First operand 4643 states and 11772 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2021-08-12 19:35:37,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:37,700 INFO L93 Difference]: Finished difference Result 5512 states and 13865 transitions. [2021-08-12 19:35:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:35:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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 40 [2021-08-12 19:35:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:37,713 INFO L225 Difference]: With dead ends: 5512 [2021-08-12 19:35:37,713 INFO L226 Difference]: Without dead ends: 5331 [2021-08-12 19:35:37,714 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:35:37,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5331 states. [2021-08-12 19:35:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5331 to 4801. [2021-08-12 19:35:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4801 states, 4800 states have (on average 2.536875) internal successors, (12177), 4800 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4801 states to 4801 states and 12177 transitions. [2021-08-12 19:35:38,917 INFO L78 Accepts]: Start accepts. Automaton has 4801 states and 12177 transitions. Word has length 40 [2021-08-12 19:35:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:38,917 INFO L482 AbstractCegarLoop]: Abstraction has 4801 states and 12177 transitions. [2021-08-12 19:35:38,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 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) [2021-08-12 19:35:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4801 states and 12177 transitions. [2021-08-12 19:35:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 19:35:38,922 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:38,922 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:39,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:39,125 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash 336026460, now seen corresponding path program 25 times [2021-08-12 19:35:39,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:39,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495600699] [2021-08-12 19:35:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-12 19:35:39,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495600699] [2021-08-12 19:35:39,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495600699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:39,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744810797] [2021-08-12 19:35:39,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:39,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:35:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:39,660 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:35:39,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-12 19:35:39,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:39,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:39,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:39,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-08-12 19:35:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:39,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744810797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:39,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:39,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2021-08-12 19:35:39,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693762814] [2021-08-12 19:35:39,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:35:39,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:39,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:35:39,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:35:39,723 INFO L87 Difference]: Start difference. First operand 4801 states and 12177 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:53,409 INFO L93 Difference]: Finished difference Result 10665 states and 26909 transitions. [2021-08-12 19:35:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-12 19:35:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:35:53,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:53,426 INFO L225 Difference]: With dead ends: 10665 [2021-08-12 19:35:53,426 INFO L226 Difference]: Without dead ends: 10514 [2021-08-12 19:35:53,427 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2057.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8111, Unknown=0, NotChecked=0, Total=9506 [2021-08-12 19:35:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10514 states. [2021-08-12 19:35:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10514 to 4901. [2021-08-12 19:35:54,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4901 states, 4900 states have (on average 2.5353061224489797) internal successors, (12423), 4900 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4901 states to 4901 states and 12423 transitions. [2021-08-12 19:35:54,738 INFO L78 Accepts]: Start accepts. Automaton has 4901 states and 12423 transitions. Word has length 40 [2021-08-12 19:35:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:54,738 INFO L482 AbstractCegarLoop]: Abstraction has 4901 states and 12423 transitions. [2021-08-12 19:35:54,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4901 states and 12423 transitions. [2021-08-12 19:35:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:35:54,745 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:54,745 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:54,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:35:54,945 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -427758525, now seen corresponding path program 26 times [2021-08-12 19:35:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:54,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520625320] [2021-08-12 19:35:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:55,227 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:55,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:55,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520625320] [2021-08-12 19:35:55,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520625320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993068813] [2021-08-12 19:35:55,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:55,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:35:55,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:35:55,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:55,771 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:35:55,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:35:55,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:55,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:55,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:55,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:35:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993068813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:35:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137367790] [2021-08-12 19:35:55,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:35:55,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:35:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:35:55,843 INFO L87 Difference]: Start difference. First operand 4901 states and 12423 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:12,718 INFO L93 Difference]: Finished difference Result 12089 states and 30708 transitions. [2021-08-12 19:36:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-08-12 19:36:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:36:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:12,735 INFO L225 Difference]: With dead ends: 12089 [2021-08-12 19:36:12,735 INFO L226 Difference]: Without dead ends: 10909 [2021-08-12 19:36:12,738 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8742 ImplicationChecksByTransitivity, 4609.9ms TimeCoverageRelationStatistics Valid=3516, Invalid=21924, Unknown=0, NotChecked=0, Total=25440 [2021-08-12 19:36:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-08-12 19:36:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 5132. [2021-08-12 19:36:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5132 states, 5131 states have (on average 2.540050672383551) internal successors, (13033), 5131 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5132 states to 5132 states and 13033 transitions. [2021-08-12 19:36:14,256 INFO L78 Accepts]: Start accepts. Automaton has 5132 states and 13033 transitions. Word has length 43 [2021-08-12 19:36:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:14,256 INFO L482 AbstractCegarLoop]: Abstraction has 5132 states and 13033 transitions. [2021-08-12 19:36:14,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 5132 states and 13033 transitions. [2021-08-12 19:36:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:36:14,262 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:14,262 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:14,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:14,464 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:14,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:14,464 INFO L82 PathProgramCache]: Analyzing trace with hash 110708185, now seen corresponding path program 27 times [2021-08-12 19:36:14,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:14,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481910694] [2021-08-12 19:36:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:14,737 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:14,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481910694] [2021-08-12 19:36:14,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481910694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:14,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990977379] [2021-08-12 19:36:14,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:14,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:36:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:14,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-12 19:36:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:15,302 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:36:15,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:36:15,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:15,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:15,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:15,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:36:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:15,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990977379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:15,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:15,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:36:15,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642590859] [2021-08-12 19:36:15,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:36:15,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:15,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:36:15,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:36:15,389 INFO L87 Difference]: Start difference. First operand 5132 states and 13033 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:41,273 INFO L93 Difference]: Finished difference Result 14805 states and 37512 transitions. [2021-08-12 19:36:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-08-12 19:36:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:36:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:41,299 INFO L225 Difference]: With dead ends: 14805 [2021-08-12 19:36:41,299 INFO L226 Difference]: Without dead ends: 13670 [2021-08-12 19:36:41,303 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15990 ImplicationChecksByTransitivity, 7425.2ms TimeCoverageRelationStatistics Valid=6081, Invalid=37391, Unknown=0, NotChecked=0, Total=43472 [2021-08-12 19:36:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13670 states. [2021-08-12 19:36:42,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13670 to 5194. [2021-08-12 19:36:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 2.5407279029462737) internal successors, (13194), 5193 states have internal predecessors, (13194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 13194 transitions. [2021-08-12 19:36:42,922 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 13194 transitions. Word has length 43 [2021-08-12 19:36:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:42,922 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 13194 transitions. [2021-08-12 19:36:42,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:42,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 13194 transitions. [2021-08-12 19:36:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:36:42,929 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:42,929 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:43,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 19:36:43,129 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -880659713, now seen corresponding path program 28 times [2021-08-12 19:36:43,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:43,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075268665] [2021-08-12 19:36:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:43,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075268665] [2021-08-12 19:36:43,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075268665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894616804] [2021-08-12 19:36:43,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:43,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:36:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:43,975 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:36:43,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:36:43,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:43,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:43,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:43,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:36:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894616804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:44,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:44,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:36:44,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18803309] [2021-08-12 19:36:44,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:36:44,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:44,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:36:44,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:36:44,055 INFO L87 Difference]: Start difference. First operand 5194 states and 13194 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:09,952 INFO L93 Difference]: Finished difference Result 14849 states and 37743 transitions. [2021-08-12 19:37:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2021-08-12 19:37:09,953 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:37:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:09,975 INFO L225 Difference]: With dead ends: 14849 [2021-08-12 19:37:09,976 INFO L226 Difference]: Without dead ends: 13932 [2021-08-12 19:37:09,980 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11848 ImplicationChecksByTransitivity, 6584.0ms TimeCoverageRelationStatistics Valid=4485, Invalid=30297, Unknown=0, NotChecked=0, Total=34782 [2021-08-12 19:37:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13932 states. [2021-08-12 19:37:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13932 to 5454. [2021-08-12 19:37:11,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5464881716486336) internal successors, (13886), 5453 states have internal predecessors, (13886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13886 transitions. [2021-08-12 19:37:11,777 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13886 transitions. Word has length 43 [2021-08-12 19:37:11,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:11,777 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13886 transitions. [2021-08-12 19:37:11,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13886 transitions. [2021-08-12 19:37:11,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:37:11,783 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:11,783 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:11,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:11,987 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:11,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:11,988 INFO L82 PathProgramCache]: Analyzing trace with hash -764697707, now seen corresponding path program 29 times [2021-08-12 19:37:11,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:11,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694799184] [2021-08-12 19:37:11,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:12,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:12,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694799184] [2021-08-12 19:37:12,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694799184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:12,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551353352] [2021-08-12 19:37:12,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:12,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:37:12,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:12,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-12 19:37:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:13,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:13,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:13,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:13,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 22 [2021-08-12 19:37:13,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:13,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:13,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:13,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:73, output treesize:10 [2021-08-12 19:37:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:13,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551353352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:13,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:13,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:37:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012876627] [2021-08-12 19:37:13,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:37:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:37:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:37:13,420 INFO L87 Difference]: Start difference. First operand 5454 states and 13886 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:28,661 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-08-12 19:37:31,292 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-08-12 19:37:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:57,811 INFO L93 Difference]: Finished difference Result 15650 states and 39972 transitions. [2021-08-12 19:37:57,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-08-12 19:37:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:37:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:57,836 INFO L225 Difference]: With dead ends: 15650 [2021-08-12 19:37:57,836 INFO L226 Difference]: Without dead ends: 14882 [2021-08-12 19:37:57,840 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12068 ImplicationChecksByTransitivity, 11363.2ms TimeCoverageRelationStatistics Valid=4072, Invalid=29968, Unknown=0, NotChecked=0, Total=34040 [2021-08-12 19:37:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14882 states. [2021-08-12 19:37:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14882 to 6016. [2021-08-12 19:38:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6016 states, 6015 states have (on average 2.5620947630922695) internal successors, (15411), 6015 states have internal predecessors, (15411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 15411 transitions. [2021-08-12 19:38:00,025 INFO L78 Accepts]: Start accepts. Automaton has 6016 states and 15411 transitions. Word has length 43 [2021-08-12 19:38:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:00,025 INFO L482 AbstractCegarLoop]: Abstraction has 6016 states and 15411 transitions. [2021-08-12 19:38:00,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 6016 states and 15411 transitions. [2021-08-12 19:38:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:38:00,031 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:00,031 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:00,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:00,231 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:00,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1773642173, now seen corresponding path program 30 times [2021-08-12 19:38:00,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:00,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632131647] [2021-08-12 19:38:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:00,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632131647] [2021-08-12 19:38:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632131647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078567011] [2021-08-12 19:38:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:00,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:38:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:38:00,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:38:00,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:01,111 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:38:01,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:38:01,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:38:01,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:38:01,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:38:01,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:38:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:01,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078567011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:01,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:01,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:38:01,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142398429] [2021-08-12 19:38:01,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:38:01,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:38:01,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:38:01,198 INFO L87 Difference]: Start difference. First operand 6016 states and 15411 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:40,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:38:40,375 INFO L93 Difference]: Finished difference Result 20666 states and 52918 transitions. [2021-08-12 19:38:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2021-08-12 19:38:40,376 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:38:40,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:38:40,408 INFO L225 Difference]: With dead ends: 20666 [2021-08-12 19:38:40,408 INFO L226 Difference]: Without dead ends: 18278 [2021-08-12 19:38:40,416 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24578 ImplicationChecksByTransitivity, 9188.7ms TimeCoverageRelationStatistics Valid=8601, Invalid=52161, Unknown=0, NotChecked=0, Total=60762 [2021-08-12 19:38:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18278 states. [2021-08-12 19:38:42,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18278 to 6142. [2021-08-12 19:38:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6142 states, 6141 states have (on average 2.563100472235792) internal successors, (15740), 6141 states have internal predecessors, (15740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6142 states to 6142 states and 15740 transitions. [2021-08-12 19:38:42,808 INFO L78 Accepts]: Start accepts. Automaton has 6142 states and 15740 transitions. Word has length 43 [2021-08-12 19:38:42,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:42,808 INFO L482 AbstractCegarLoop]: Abstraction has 6142 states and 15740 transitions. [2021-08-12 19:38:42,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:42,809 INFO L276 IsEmpty]: Start isEmpty. Operand 6142 states and 15740 transitions. [2021-08-12 19:38:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:38:42,815 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:42,815 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:43,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:43,016 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 875403101, now seen corresponding path program 31 times [2021-08-12 19:38:43,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:43,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016109062] [2021-08-12 19:38:43,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:43,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:43,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016109062] [2021-08-12 19:38:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016109062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:43,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367572890] [2021-08-12 19:38:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:38:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:43,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:38:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:43,825 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:38:43,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:38:43,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:38:43,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:38:43,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:38:43,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:38:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:43,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367572890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:43,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:43,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-08-12 19:38:43,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402635594] [2021-08-12 19:38:43,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-08-12 19:38:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-12 19:38:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:38:43,896 INFO L87 Difference]: Start difference. First operand 6142 states and 15740 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:39:22,298 INFO L93 Difference]: Finished difference Result 17931 states and 45846 transitions. [2021-08-12 19:39:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-08-12 19:39:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:39:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:39:22,325 INFO L225 Difference]: With dead ends: 17931 [2021-08-12 19:39:22,325 INFO L226 Difference]: Without dead ends: 16706 [2021-08-12 19:39:22,330 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20501 ImplicationChecksByTransitivity, 8094.9ms TimeCoverageRelationStatistics Valid=7171, Invalid=45499, Unknown=0, NotChecked=0, Total=52670 [2021-08-12 19:39:22,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16706 states. [2021-08-12 19:39:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16706 to 6404. [2021-08-12 19:39:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 6403 states have (on average 2.567702639387787) internal successors, (16441), 6403 states have internal predecessors, (16441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 16441 transitions. [2021-08-12 19:39:25,016 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 16441 transitions. Word has length 43 [2021-08-12 19:39:25,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:39:25,016 INFO L482 AbstractCegarLoop]: Abstraction has 6404 states and 16441 transitions. [2021-08-12 19:39:25,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:25,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 16441 transitions. [2021-08-12 19:39:25,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:39:25,024 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:39:25,024 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:39:25,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-12 19:39:25,225 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:39:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:39:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1672349977, now seen corresponding path program 32 times [2021-08-12 19:39:25,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:39:25,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107983659] [2021-08-12 19:39:25,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:39:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:39:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:25,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:39:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107983659] [2021-08-12 19:39:25,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107983659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:25,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712459305] [2021-08-12 19:39:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:39:25,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:39:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:39:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:39:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:39:26,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:39:26,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:26,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2021-08-12 19:39:26,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:39:26,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:39:26,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:39:26,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:10 [2021-08-12 19:39:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:26,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712459305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:26,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:39:26,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-12 19:39:26,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658611630] [2021-08-12 19:39:26,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:39:26,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:39:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:39:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:39:26,213 INFO L87 Difference]: Start difference. First operand 6404 states and 16441 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:04,984 INFO L93 Difference]: Finished difference Result 20495 states and 52808 transitions. [2021-08-12 19:40:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2021-08-12 19:40:04,985 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:40:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:05,023 INFO L225 Difference]: With dead ends: 20495 [2021-08-12 19:40:05,023 INFO L226 Difference]: Without dead ends: 18559 [2021-08-12 19:40:05,030 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17805 ImplicationChecksByTransitivity, 7128.9ms TimeCoverageRelationStatistics Valid=6025, Invalid=39131, Unknown=0, NotChecked=0, Total=45156 [2021-08-12 19:40:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18559 states. [2021-08-12 19:40:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18559 to 7142. [2021-08-12 19:40:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7141 states have (on average 2.563786584511973) internal successors, (18308), 7141 states have internal predecessors, (18308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 18308 transitions. [2021-08-12 19:40:08,748 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 18308 transitions. Word has length 43 [2021-08-12 19:40:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:08,748 INFO L482 AbstractCegarLoop]: Abstraction has 7142 states and 18308 transitions. [2021-08-12 19:40:08,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 18308 transitions. [2021-08-12 19:40:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:40:08,756 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:08,756 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:08,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:08,957 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1747211427, now seen corresponding path program 33 times [2021-08-12 19:40:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:08,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708200624] [2021-08-12 19:40:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:09,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:09,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708200624] [2021-08-12 19:40:09,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708200624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:09,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150940953] [2021-08-12 19:40:09,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:09,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:40:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:40:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:09,804 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:40:09,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:40:09,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:09,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:09,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:09,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:40:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150940953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:09,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:09,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-08-12 19:40:09,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581297106] [2021-08-12 19:40:09,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-08-12 19:40:09,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:09,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-12 19:40:09,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 19:40:09,879 INFO L87 Difference]: Start difference. First operand 7142 states and 18308 transitions. Second operand has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:49,985 INFO L93 Difference]: Finished difference Result 17870 states and 45696 transitions. [2021-08-12 19:40:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-08-12 19:40:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:40:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:50,021 INFO L225 Difference]: With dead ends: 17870 [2021-08-12 19:40:50,022 INFO L226 Difference]: Without dead ends: 17342 [2021-08-12 19:40:50,027 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13007 ImplicationChecksByTransitivity, 5602.1ms TimeCoverageRelationStatistics Valid=4015, Invalid=30767, Unknown=0, NotChecked=0, Total=34782 [2021-08-12 19:40:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17342 states. [2021-08-12 19:40:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17342 to 8284. [2021-08-12 19:40:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 2.5694796571290595) internal successors, (21283), 8283 states have internal predecessors, (21283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 21283 transitions. [2021-08-12 19:40:54,597 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 21283 transitions. Word has length 43 [2021-08-12 19:40:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:54,598 INFO L482 AbstractCegarLoop]: Abstraction has 8284 states and 21283 transitions. [2021-08-12 19:40:54,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 21283 transitions. [2021-08-12 19:40:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:40:54,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:54,607 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:54,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:54,820 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1084673731, now seen corresponding path program 34 times [2021-08-12 19:40:54,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:54,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191840946] [2021-08-12 19:40:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:40:55,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191840946] [2021-08-12 19:40:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191840946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861221055] [2021-08-12 19:40:55,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:40:55,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:40:55,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:55,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:40:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:55,621 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-12 19:40:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:40:55,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:55,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:55,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:55,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-08-12 19:40:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:55,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861221055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:55,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:55,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-12 19:40:55,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706207386] [2021-08-12 19:40:55,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-08-12 19:40:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:55,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-12 19:40:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:40:55,688 INFO L87 Difference]: Start difference. First operand 8284 states and 21283 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:45,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:45,161 INFO L93 Difference]: Finished difference Result 20471 states and 52470 transitions. [2021-08-12 19:41:45,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2021-08-12 19:41:45,162 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-12 19:41:45,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:45,201 INFO L225 Difference]: With dead ends: 20471 [2021-08-12 19:41:45,201 INFO L226 Difference]: Without dead ends: 19406 [2021-08-12 19:41:45,207 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18575 ImplicationChecksByTransitivity, 7332.9ms TimeCoverageRelationStatistics Valid=6094, Invalid=41212, Unknown=0, NotChecked=0, Total=47306 [2021-08-12 19:41:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19406 states. [2021-08-12 19:41:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19406 to 8918. [2021-08-12 19:41:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8918 states, 8917 states have (on average 2.5737355612874286) internal successors, (22950), 8917 states have internal predecessors, (22950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8918 states to 8918 states and 22950 transitions. [2021-08-12 19:41:50,588 INFO L78 Accepts]: Start accepts. Automaton has 8918 states and 22950 transitions. Word has length 43 [2021-08-12 19:41:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:50,589 INFO L482 AbstractCegarLoop]: Abstraction has 8918 states and 22950 transitions. [2021-08-12 19:41:50,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8918 states and 22950 transitions. [2021-08-12 19:41:50,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-12 19:41:50,599 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:50,599 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:50,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-12 19:41:50,809 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1869332675, now seen corresponding path program 35 times [2021-08-12 19:41:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:50,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096117350] [2021-08-12 19:41:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:51,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096117350] [2021-08-12 19:41:51,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096117350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:51,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367062321] [2021-08-12 19:41:51,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:51,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:41:51,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-12 19:41:51,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:51,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:51,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:51,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-08-12 19:41:51,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:51,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:51,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:51,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:10 [2021-08-12 19:41:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:51,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367062321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:51,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:51,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 38 [2021-08-12 19:41:51,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656956305] [2021-08-12 19:41:51,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-08-12 19:41:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-12 19:41:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:41:51,784 INFO L87 Difference]: Start difference. First operand 8918 states and 22950 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 19:41:52,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:41:53,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:53,130 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:41:53,132 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:41:53,133 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:41:53,133 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:41:53 BasicIcfg [2021-08-12 19:41:53,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:41:53,134 INFO L168 Benchmark]: Toolchain (without parser) took 549240.04 ms. Allocated memory was 192.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 174.2 MB in the beginning and 856.0 MB in the end (delta: -681.8 MB). Peak memory consumption was 724.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 192.9 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 192.9 MB. Free memory was 174.1 MB in the beginning and 172.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 INFO L168 Benchmark]: Boogie Preprocessor took 10.89 ms. Allocated memory is still 192.9 MB. Free memory was 172.7 MB in the beginning and 171.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 INFO L168 Benchmark]: RCFGBuilder took 234.85 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 159.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 INFO L168 Benchmark]: TraceAbstraction took 548966.71 ms. Allocated memory was 192.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 158.6 MB in the beginning and 856.0 MB in the end (delta: -697.4 MB). Peak memory consumption was 708.4 MB. Max. memory is 8.0 GB. [2021-08-12 19:41:53,134 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 0.13 ms. Allocated memory is still 192.9 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 192.9 MB. Free memory was 174.1 MB in the beginning and 172.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.89 ms. Allocated memory is still 192.9 MB. Free memory was 172.7 MB in the beginning and 171.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 234.85 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 159.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 548966.71 ms. Allocated memory was 192.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 158.6 MB in the beginning and 856.0 MB in the end (delta: -697.4 MB). Peak memory consumption was 708.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8918states) and FLOYD_HOARE automaton (currently 27 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 61 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 548869.0ms, OverallIterations: 38, TraceHistogramMax: 4, EmptinessCheckTime: 150.2ms, AutomataDifference: 480215.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2496 SDtfs, 19972 SDslu, 39510 SDs, 0 SdLazy, 67150 SolverSat, 8989 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41725.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5217 GetRequests, 901 SyntacticMatches, 8 SemanticMatches, 4307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247031 ImplicationChecksByTransitivity, 126251.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8918occurred in iteration=37, InterpolantAutomatonStates: 3459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 37340.1ms AutomataMinimizationTime, 37 MinimizatonAttempts, 175642 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 149.7ms SsaConstructionTime, 567.1ms SatisfiabilityAnalysisTime, 22062.8ms InterpolantComputationTime, 2662 NumberOfCodeBlocks, 2662 NumberOfCodeBlocksAsserted, 135 NumberOfCheckSat, 2589 ConstructedInterpolants, 91 QuantifiedInterpolants, 37717 SizeOfPredicates, 233 NumberOfNonLiveVariables, 3166 ConjunctsInSsa, 872 ConjunctsInUnsatCore, 73 InterpolantComputations, 3 PerfectInterpolantSequences, 129/1859 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