/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/min-max-inc-dec.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:02:29,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:02:29,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:02:29,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:02:29,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 20:02:29,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 20:02:29,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 20:02:29,793 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 [2021-07-13 20:02:29,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:02:29,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:02:29,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:02:29,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:02:29,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:02:29,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:02:29,823 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:02:29,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:02:29,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:02:29,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:02:29,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:02:29,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:02:29,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:02:29,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:02:29,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:02:29,827 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:02:29,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:02:29,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:02:30,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:02:30,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:02:30,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:02:30,105 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:02:30,106 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:02:30,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl [2021-07-13 20:02:30,106 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc-dec.wvr.bpl' [2021-07-13 20:02:30,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:02:30,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:02:30,138 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:02:30,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:02:30,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:02:30,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:02:30,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:02:30,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:02:30,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:02:30,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/1) ... [2021-07-13 20:02:30,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:02:30,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:02:30,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:02:30,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:02:30,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (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 [2021-07-13 20:02:30,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:02:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:02:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:02:30,261 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:02:30,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:02:30,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:02:30,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:02:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:02:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:02:30,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:02:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:02:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:02:30,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:02:30,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:02:30,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:02:30,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-07-13 20:02:30,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-07-13 20:02:30,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-07-13 20:02:30,263 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:02:30,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:02:30,495 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:02:30,497 INFO L202 PluginConnector]: Adding new model min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:02:30 BoogieIcfgContainer [2021-07-13 20:02:30,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:02:30,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:02:30,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:02:30,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:02:30,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:02:30" (1/2) ... [2021-07-13 20:02:30,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610db1a4 and model type min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:02:30, skipping insertion in model container [2021-07-13 20:02:30,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc-dec.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:02:30" (2/2) ... [2021-07-13 20:02:30,502 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc-dec.wvr.bpl [2021-07-13 20:02:30,514 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:02:30,515 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:02:30,515 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:02:30,515 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:02:30,567 INFO L149 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-07-13 20:02:30,583 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-07-13 20:02:30,596 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:02:30,597 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:02:30,597 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:02:30,597 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:02:30,597 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:02:30,597 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:02:30,597 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:02:30,597 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:02:30,604 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 42 transitions, 124 flow [2021-07-13 20:02:30,730 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:02:30,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:30,776 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:30,776 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1163835750, now seen corresponding path program 1 times [2021-07-13 20:02:30,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373625664] [2021-07-13 20:02:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:30,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:30,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373625664] [2021-07-13 20:02:30,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373625664] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:30,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:30,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:02:30,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407562656] [2021-07-13 20:02:30,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:02:30,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:02:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:30,988 INFO L87 Difference]: Start difference. First operand has 2846 states, 2845 states have (on average 4.640421792618629) internal successors, (13202), 2845 states have internal predecessors, (13202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:31,333 INFO L93 Difference]: Finished difference Result 13093 states and 60005 transitions. [2021-07-13 20:02:31,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:02:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:31,443 INFO L225 Difference]: With dead ends: 13093 [2021-07-13 20:02:31,443 INFO L226 Difference]: Without dead ends: 8907 [2021-07-13 20:02:31,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-07-13 20:02:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 3875. [2021-07-13 20:02:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.593959731543624) internal successors, (17797), 3874 states have internal predecessors, (17797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17797 transitions. [2021-07-13 20:02:31,851 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17797 transitions. Word has length 27 [2021-07-13 20:02:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:31,852 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17797 transitions. [2021-07-13 20:02:31,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17797 transitions. [2021-07-13 20:02:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:02:31,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:31,869 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:31,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:02:31,870 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:31,873 INFO L82 PathProgramCache]: Analyzing trace with hash 429888594, now seen corresponding path program 2 times [2021-07-13 20:02:31,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:31,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460275699] [2021-07-13 20:02:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:31,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:31,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:31,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460275699] [2021-07-13 20:02:31,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460275699] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:31,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:31,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048145749] [2021-07-13 20:02:31,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:31,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:31,929 INFO L87 Difference]: Start difference. First operand 3875 states and 17797 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:32,014 INFO L93 Difference]: Finished difference Result 4814 states and 21965 transitions. [2021-07-13 20:02:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:02:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:32,048 INFO L225 Difference]: With dead ends: 4814 [2021-07-13 20:02:32,048 INFO L226 Difference]: Without dead ends: 3427 [2021-07-13 20:02:32,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2021-07-13 20:02:32,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3427. [2021-07-13 20:02:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.5128429655575015) internal successors, (15461), 3426 states have internal predecessors, (15461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 15461 transitions. [2021-07-13 20:02:32,203 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 15461 transitions. Word has length 27 [2021-07-13 20:02:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:32,204 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 15461 transitions. [2021-07-13 20:02:32,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 15461 transitions. [2021-07-13 20:02:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:02:32,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:32,215 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:32,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:02:32,215 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1712459686, now seen corresponding path program 3 times [2021-07-13 20:02:32,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:32,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286828018] [2021-07-13 20:02:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:32,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:32,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286828018] [2021-07-13 20:02:32,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286828018] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:32,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:32,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 20:02:32,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754630343] [2021-07-13 20:02:32,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:02:32,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:32,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:02:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:32,282 INFO L87 Difference]: Start difference. First operand 3427 states and 15461 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:32,506 INFO L93 Difference]: Finished difference Result 13141 states and 59505 transitions. [2021-07-13 20:02:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:32,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:02:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:32,559 INFO L225 Difference]: With dead ends: 13141 [2021-07-13 20:02:32,559 INFO L226 Difference]: Without dead ends: 9627 [2021-07-13 20:02:32,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9627 states. [2021-07-13 20:02:32,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9627 to 3610. [2021-07-13 20:02:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 4.5259074535882515) internal successors, (16334), 3609 states have internal predecessors, (16334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 16334 transitions. [2021-07-13 20:02:32,788 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 16334 transitions. Word has length 27 [2021-07-13 20:02:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:32,789 INFO L482 AbstractCegarLoop]: Abstraction has 3610 states and 16334 transitions. [2021-07-13 20:02:32,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 16334 transitions. [2021-07-13 20:02:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:02:32,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:32,799 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:32,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:02:32,800 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2145849606, now seen corresponding path program 4 times [2021-07-13 20:02:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:32,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701410008] [2021-07-13 20:02:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:32,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:32,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701410008] [2021-07-13 20:02:32,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701410008] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:32,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:32,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:32,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496313056] [2021-07-13 20:02:32,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:32,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:32,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:32,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:32,824 INFO L87 Difference]: Start difference. First operand 3610 states and 16334 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:32,869 INFO L93 Difference]: Finished difference Result 4293 states and 19350 transitions. [2021-07-13 20:02:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:02:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:32,884 INFO L225 Difference]: With dead ends: 4293 [2021-07-13 20:02:32,884 INFO L226 Difference]: Without dead ends: 3354 [2021-07-13 20:02:32,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3354 states. [2021-07-13 20:02:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3354 to 3354. [2021-07-13 20:02:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 3353 states have (on average 4.470623322397853) internal successors, (14990), 3353 states have internal predecessors, (14990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 14990 transitions. [2021-07-13 20:02:33,051 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 14990 transitions. Word has length 27 [2021-07-13 20:02:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:33,052 INFO L482 AbstractCegarLoop]: Abstraction has 3354 states and 14990 transitions. [2021-07-13 20:02:33,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 14990 transitions. [2021-07-13 20:02:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:33,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:33,062 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:33,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 20:02:33,063 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:33,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:33,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1566246808, now seen corresponding path program 1 times [2021-07-13 20:02:33,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:33,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826907048] [2021-07-13 20:02:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:33,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:33,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826907048] [2021-07-13 20:02:33,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826907048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:33,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074974787] [2021-07-13 20:02:33,120 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 [2021-07-13 20:02:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:02:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:33,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074974787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:33,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:33,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 20:02:33,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740376041] [2021-07-13 20:02:33,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:02:33,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:02:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:02:33,360 INFO L87 Difference]: Start difference. First operand 3354 states and 14990 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:33,499 INFO L93 Difference]: Finished difference Result 6670 states and 29656 transitions. [2021-07-13 20:02:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:02:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:33,527 INFO L225 Difference]: With dead ends: 6670 [2021-07-13 20:02:33,527 INFO L226 Difference]: Without dead ends: 6670 [2021-07-13 20:02:33,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:02:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2021-07-13 20:02:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 4206. [2021-07-13 20:02:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 4.520332936979786) internal successors, (19008), 4205 states have internal predecessors, (19008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 19008 transitions. [2021-07-13 20:02:33,769 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 19008 transitions. Word has length 29 [2021-07-13 20:02:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:33,769 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 19008 transitions. [2021-07-13 20:02:33,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 19008 transitions. [2021-07-13 20:02:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:33,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:33,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:33,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:33,989 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:33,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash 433543324, now seen corresponding path program 1 times [2021-07-13 20:02:33,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:33,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615902796] [2021-07-13 20:02:33,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:33,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:34,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:34,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615902796] [2021-07-13 20:02:34,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615902796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:34,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991552294] [2021-07-13 20:02:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:02:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991552294] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:34,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:02:34,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-07-13 20:02:34,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735828565] [2021-07-13 20:02:34,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:34,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:34,149 INFO L87 Difference]: Start difference. First operand 4206 states and 19008 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:34,227 INFO L93 Difference]: Finished difference Result 5618 states and 25299 transitions. [2021-07-13 20:02:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:34,253 INFO L225 Difference]: With dead ends: 5618 [2021-07-13 20:02:34,253 INFO L226 Difference]: Without dead ends: 5418 [2021-07-13 20:02:34,254 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5418 states. [2021-07-13 20:02:34,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5418 to 4426. [2021-07-13 20:02:34,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 4425 states have (on average 4.55864406779661) internal successors, (20172), 4425 states have internal predecessors, (20172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:34,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 20172 transitions. [2021-07-13 20:02:34,478 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 20172 transitions. Word has length 29 [2021-07-13 20:02:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:34,478 INFO L482 AbstractCegarLoop]: Abstraction has 4426 states and 20172 transitions. [2021-07-13 20:02:34,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:34,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 20172 transitions. [2021-07-13 20:02:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:34,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:34,499 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:34,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:34,713 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1698649094, now seen corresponding path program 1 times [2021-07-13 20:02:34,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810056276] [2021-07-13 20:02:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:34,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:34,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810056276] [2021-07-13 20:02:34,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810056276] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:34,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:34,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:34,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017563663] [2021-07-13 20:02:34,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:34,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:34,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:34,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:34,733 INFO L87 Difference]: Start difference. First operand 4426 states and 20172 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:34,816 INFO L93 Difference]: Finished difference Result 7946 states and 35321 transitions. [2021-07-13 20:02:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:34,846 INFO L225 Difference]: With dead ends: 7946 [2021-07-13 20:02:34,847 INFO L226 Difference]: Without dead ends: 7848 [2021-07-13 20:02:34,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:34,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-07-13 20:02:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 6434. [2021-07-13 20:02:35,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 6433 states have (on average 4.542048810819214) internal successors, (29219), 6433 states have internal predecessors, (29219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 29219 transitions. [2021-07-13 20:02:35,057 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 29219 transitions. Word has length 29 [2021-07-13 20:02:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:35,057 INFO L482 AbstractCegarLoop]: Abstraction has 6434 states and 29219 transitions. [2021-07-13 20:02:35,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 29219 transitions. [2021-07-13 20:02:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:35,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:35,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:35,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:02:35,146 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:35,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1904404146, now seen corresponding path program 1 times [2021-07-13 20:02:35,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:35,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216144029] [2021-07-13 20:02:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:35,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:35,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216144029] [2021-07-13 20:02:35,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216144029] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:35,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:35,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:35,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429300268] [2021-07-13 20:02:35,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:35,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:35,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:35,194 INFO L87 Difference]: Start difference. First operand 6434 states and 29219 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:35,291 INFO L93 Difference]: Finished difference Result 11319 states and 50308 transitions. [2021-07-13 20:02:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:35,333 INFO L225 Difference]: With dead ends: 11319 [2021-07-13 20:02:35,333 INFO L226 Difference]: Without dead ends: 11198 [2021-07-13 20:02:35,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:35,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2021-07-13 20:02:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 8925. [2021-07-13 20:02:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8925 states, 8924 states have (on average 4.6001792917974) internal successors, (41052), 8924 states have internal predecessors, (41052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8925 states to 8925 states and 41052 transitions. [2021-07-13 20:02:35,749 INFO L78 Accepts]: Start accepts. Automaton has 8925 states and 41052 transitions. Word has length 29 [2021-07-13 20:02:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:35,750 INFO L482 AbstractCegarLoop]: Abstraction has 8925 states and 41052 transitions. [2021-07-13 20:02:35,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:35,750 INFO L276 IsEmpty]: Start isEmpty. Operand 8925 states and 41052 transitions. [2021-07-13 20:02:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:35,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:35,774 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:35,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 20:02:35,775 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -488899552, now seen corresponding path program 2 times [2021-07-13 20:02:35,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:35,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929299694] [2021-07-13 20:02:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:35,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:35,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929299694] [2021-07-13 20:02:35,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929299694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:35,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935965957] [2021-07-13 20:02:35,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:35,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:02:35,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:35,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935965957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:35,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:35,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-13 20:02:35,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472368334] [2021-07-13 20:02:35,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:02:35,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:02:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:35,988 INFO L87 Difference]: Start difference. First operand 8925 states and 41052 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:36,818 INFO L93 Difference]: Finished difference Result 32299 states and 139445 transitions. [2021-07-13 20:02:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:02:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:36,950 INFO L225 Difference]: With dead ends: 32299 [2021-07-13 20:02:36,951 INFO L226 Difference]: Without dead ends: 25555 [2021-07-13 20:02:36,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:02:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25555 states. [2021-07-13 20:02:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25555 to 11171. [2021-07-13 20:02:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11171 states, 11170 states have (on average 4.575201432408236) internal successors, (51105), 11170 states have internal predecessors, (51105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11171 states to 11171 states and 51105 transitions. [2021-07-13 20:02:37,575 INFO L78 Accepts]: Start accepts. Automaton has 11171 states and 51105 transitions. Word has length 29 [2021-07-13 20:02:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:37,575 INFO L482 AbstractCegarLoop]: Abstraction has 11171 states and 51105 transitions. [2021-07-13 20:02:37,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,575 INFO L276 IsEmpty]: Start isEmpty. Operand 11171 states and 51105 transitions. [2021-07-13 20:02:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:37,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:37,606 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:37,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:37,826 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1050645784, now seen corresponding path program 2 times [2021-07-13 20:02:37,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:37,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348542519] [2021-07-13 20:02:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:37,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:37,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348542519] [2021-07-13 20:02:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348542519] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:37,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:37,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614853106] [2021-07-13 20:02:37,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:37,849 INFO L87 Difference]: Start difference. First operand 11171 states and 51105 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:37,961 INFO L93 Difference]: Finished difference Result 13617 states and 60966 transitions. [2021-07-13 20:02:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:38,008 INFO L225 Difference]: With dead ends: 13617 [2021-07-13 20:02:38,009 INFO L226 Difference]: Without dead ends: 13377 [2021-07-13 20:02:38,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13377 states. [2021-07-13 20:02:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13377 to 11217. [2021-07-13 20:02:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11217 states, 11216 states have (on average 4.5536733238231095) internal successors, (51074), 11216 states have internal predecessors, (51074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11217 states to 11217 states and 51074 transitions. [2021-07-13 20:02:38,474 INFO L78 Accepts]: Start accepts. Automaton has 11217 states and 51074 transitions. Word has length 29 [2021-07-13 20:02:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:38,475 INFO L482 AbstractCegarLoop]: Abstraction has 11217 states and 51074 transitions. [2021-07-13 20:02:38,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 11217 states and 51074 transitions. [2021-07-13 20:02:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:38,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:38,506 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:38,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 20:02:38,507 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:38,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:38,507 INFO L82 PathProgramCache]: Analyzing trace with hash -439577730, now seen corresponding path program 2 times [2021-07-13 20:02:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:38,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404801902] [2021-07-13 20:02:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:38,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:38,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404801902] [2021-07-13 20:02:38,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404801902] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:38,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:38,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:38,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304885569] [2021-07-13 20:02:38,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:38,537 INFO L87 Difference]: Start difference. First operand 11217 states and 51074 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:38,747 INFO L93 Difference]: Finished difference Result 12377 states and 54923 transitions. [2021-07-13 20:02:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:02:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:38,791 INFO L225 Difference]: With dead ends: 12377 [2021-07-13 20:02:38,791 INFO L226 Difference]: Without dead ends: 12377 [2021-07-13 20:02:38,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12377 states. [2021-07-13 20:02:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12377 to 10689. [2021-07-13 20:02:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 4.55875748502994) internal successors, (48724), 10688 states have internal predecessors, (48724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 48724 transitions. [2021-07-13 20:02:39,067 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 48724 transitions. Word has length 29 [2021-07-13 20:02:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:39,067 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 48724 transitions. [2021-07-13 20:02:39,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 48724 transitions. [2021-07-13 20:02:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:39,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:39,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:39,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 20:02:39,091 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1843096386, now seen corresponding path program 3 times [2021-07-13 20:02:39,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:39,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656542459] [2021-07-13 20:02:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:39,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:39,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656542459] [2021-07-13 20:02:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656542459] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:39,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:39,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576327567] [2021-07-13 20:02:39,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:39,123 INFO L87 Difference]: Start difference. First operand 10689 states and 48724 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:39,319 INFO L93 Difference]: Finished difference Result 13645 states and 60695 transitions. [2021-07-13 20:02:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:02:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:39,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:39,372 INFO L225 Difference]: With dead ends: 13645 [2021-07-13 20:02:39,372 INFO L226 Difference]: Without dead ends: 13645 [2021-07-13 20:02:39,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2021-07-13 20:02:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 11058. [2021-07-13 20:02:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 4.563353531699376) internal successors, (50457), 11057 states have internal predecessors, (50457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50457 transitions. [2021-07-13 20:02:39,734 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50457 transitions. Word has length 29 [2021-07-13 20:02:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:39,734 INFO L482 AbstractCegarLoop]: Abstraction has 11058 states and 50457 transitions. [2021-07-13 20:02:39,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50457 transitions. [2021-07-13 20:02:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:39,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:39,761 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:39,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 20:02:39,762 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 266466850, now seen corresponding path program 4 times [2021-07-13 20:02:39,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:39,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925179282] [2021-07-13 20:02:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:39,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:39,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925179282] [2021-07-13 20:02:39,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925179282] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:39,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:39,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:02:39,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309686836] [2021-07-13 20:02:39,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:02:39,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:02:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:39,791 INFO L87 Difference]: Start difference. First operand 11058 states and 50457 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:39,929 INFO L93 Difference]: Finished difference Result 16291 states and 70649 transitions. [2021-07-13 20:02:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:39,988 INFO L225 Difference]: With dead ends: 16291 [2021-07-13 20:02:39,989 INFO L226 Difference]: Without dead ends: 15970 [2021-07-13 20:02:39,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15970 states. [2021-07-13 20:02:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15970 to 11469. [2021-07-13 20:02:40,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11469 states, 11468 states have (on average 4.508719916288803) internal successors, (51706), 11468 states have internal predecessors, (51706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11469 states to 11469 states and 51706 transitions. [2021-07-13 20:02:40,375 INFO L78 Accepts]: Start accepts. Automaton has 11469 states and 51706 transitions. Word has length 29 [2021-07-13 20:02:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:40,375 INFO L482 AbstractCegarLoop]: Abstraction has 11469 states and 51706 transitions. [2021-07-13 20:02:40,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 11469 states and 51706 transitions. [2021-07-13 20:02:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:40,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:40,402 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:40,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 20:02:40,403 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:40,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash -825067438, now seen corresponding path program 2 times [2021-07-13 20:02:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:40,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282941140] [2021-07-13 20:02:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:40,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282941140] [2021-07-13 20:02:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282941140] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:40,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:40,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:40,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500791890] [2021-07-13 20:02:40,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:40,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:40,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:40,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:40,419 INFO L87 Difference]: Start difference. First operand 11469 states and 51706 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:40,532 INFO L93 Difference]: Finished difference Result 12834 states and 56257 transitions. [2021-07-13 20:02:40,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:40,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:40,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:40,573 INFO L225 Difference]: With dead ends: 12834 [2021-07-13 20:02:40,574 INFO L226 Difference]: Without dead ends: 12536 [2021-07-13 20:02:40,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12536 states. [2021-07-13 20:02:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12536 to 11045. [2021-07-13 20:02:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11045 states, 11044 states have (on average 4.486327417602318) internal successors, (49547), 11044 states have internal predecessors, (49547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11045 states to 11045 states and 49547 transitions. [2021-07-13 20:02:40,835 INFO L78 Accepts]: Start accepts. Automaton has 11045 states and 49547 transitions. Word has length 29 [2021-07-13 20:02:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:40,836 INFO L482 AbstractCegarLoop]: Abstraction has 11045 states and 49547 transitions. [2021-07-13 20:02:40,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11045 states and 49547 transitions. [2021-07-13 20:02:40,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:40,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:40,860 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:40,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 20:02:40,861 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1522958180, now seen corresponding path program 3 times [2021-07-13 20:02:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:40,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078522597] [2021-07-13 20:02:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:40,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:40,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078522597] [2021-07-13 20:02:40,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078522597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:40,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578167619] [2021-07-13 20:02:40,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:40,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:02:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:02:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:41,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578167619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:41,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:41,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-07-13 20:02:41,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365354609] [2021-07-13 20:02:41,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:02:41,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:41,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:02:41,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:41,004 INFO L87 Difference]: Start difference. First operand 11045 states and 49547 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:41,971 INFO L93 Difference]: Finished difference Result 32160 states and 143469 transitions. [2021-07-13 20:02:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:02:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:42,040 INFO L225 Difference]: With dead ends: 32160 [2021-07-13 20:02:42,040 INFO L226 Difference]: Without dead ends: 14152 [2021-07-13 20:02:42,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=442, Invalid=1364, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:02:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14152 states. [2021-07-13 20:02:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14152 to 6271. [2021-07-13 20:02:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6271 states, 6270 states have (on average 4.431738437001595) internal successors, (27787), 6270 states have internal predecessors, (27787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6271 states to 6271 states and 27787 transitions. [2021-07-13 20:02:42,301 INFO L78 Accepts]: Start accepts. Automaton has 6271 states and 27787 transitions. Word has length 29 [2021-07-13 20:02:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:42,301 INFO L482 AbstractCegarLoop]: Abstraction has 6271 states and 27787 transitions. [2021-07-13 20:02:42,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6271 states and 27787 transitions. [2021-07-13 20:02:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:02:42,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:42,317 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:42,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:42,529 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1293669152, now seen corresponding path program 3 times [2021-07-13 20:02:42,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:42,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732776614] [2021-07-13 20:02:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:42,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:42,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732776614] [2021-07-13 20:02:42,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732776614] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:02:42,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:02:42,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:02:42,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737094272] [2021-07-13 20:02:42,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:02:42,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:02:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:02:42,557 INFO L87 Difference]: Start difference. First operand 6271 states and 27787 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:42,636 INFO L93 Difference]: Finished difference Result 6724 states and 29846 transitions. [2021-07-13 20:02:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:02:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 20:02:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:42,657 INFO L225 Difference]: With dead ends: 6724 [2021-07-13 20:02:42,658 INFO L226 Difference]: Without dead ends: 6130 [2021-07-13 20:02:42,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:02:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2021-07-13 20:02:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 5320. [2021-07-13 20:02:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 4.505170144764054) internal successors, (23963), 5319 states have internal predecessors, (23963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 23963 transitions. [2021-07-13 20:02:42,791 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 23963 transitions. Word has length 29 [2021-07-13 20:02:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:42,791 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 23963 transitions. [2021-07-13 20:02:42,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 23963 transitions. [2021-07-13 20:02:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:42,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:42,803 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:42,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 20:02:42,803 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 903556046, now seen corresponding path program 1 times [2021-07-13 20:02:42,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:42,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181117402] [2021-07-13 20:02:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:42,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181117402] [2021-07-13 20:02:42,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181117402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856209774] [2021-07-13 20:02:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 20:02:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:42,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:02:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:43,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:02:43,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:43,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:43,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:43,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-13 20:02:43,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:02:43,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:43,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:43,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:43,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-13 20:02:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:43,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856209774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:43,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:43,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 20:02:43,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161185264] [2021-07-13 20:02:43,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:02:43,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:02:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:43,115 INFO L87 Difference]: Start difference. First operand 5320 states and 23963 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:43,444 INFO L93 Difference]: Finished difference Result 15401 states and 70028 transitions. [2021-07-13 20:02:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:02:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:02:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:43,480 INFO L225 Difference]: With dead ends: 15401 [2021-07-13 20:02:43,480 INFO L226 Difference]: Without dead ends: 9617 [2021-07-13 20:02:43,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:02:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9617 states. [2021-07-13 20:02:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9617 to 6899. [2021-07-13 20:02:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6899 states, 6898 states have (on average 4.447521020585677) internal successors, (30679), 6898 states have internal predecessors, (30679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6899 states to 6899 states and 30679 transitions. [2021-07-13 20:02:43,690 INFO L78 Accepts]: Start accepts. Automaton has 6899 states and 30679 transitions. Word has length 35 [2021-07-13 20:02:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:43,690 INFO L482 AbstractCegarLoop]: Abstraction has 6899 states and 30679 transitions. [2021-07-13 20:02:43,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6899 states and 30679 transitions. [2021-07-13 20:02:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:43,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:43,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:43,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:02:43,907 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -356412096, now seen corresponding path program 2 times [2021-07-13 20:02:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:43,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792026902] [2021-07-13 20:02:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:43,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:43,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792026902] [2021-07-13 20:02:43,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792026902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:43,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111941189] [2021-07-13 20:02:43,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:44,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:02:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:44,037 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 [2021-07-13 20:02:44,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:44,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:02:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111941189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:44,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:44,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:02:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006450962] [2021-07-13 20:02:44,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:02:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:02:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:02:44,078 INFO L87 Difference]: Start difference. First operand 6899 states and 30679 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-07-13 20:02:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:44,276 INFO L93 Difference]: Finished difference Result 13711 states and 61754 transitions. [2021-07-13 20:02:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 35 [2021-07-13 20:02:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:44,302 INFO L225 Difference]: With dead ends: 13711 [2021-07-13 20:02:44,302 INFO L226 Difference]: Without dead ends: 8117 [2021-07-13 20:02:44,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:02:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-13 20:02:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6184. [2021-07-13 20:02:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6183 states have (on average 4.44088630114831) internal successors, (27458), 6183 states have internal predecessors, (27458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 27458 transitions. [2021-07-13 20:02:44,442 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 27458 transitions. Word has length 35 [2021-07-13 20:02:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:44,443 INFO L482 AbstractCegarLoop]: Abstraction has 6184 states and 27458 transitions. [2021-07-13 20:02:44,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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) [2021-07-13 20:02:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 27458 transitions. [2021-07-13 20:02:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:44,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:44,457 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:44,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:02:44,658 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash -427040094, now seen corresponding path program 3 times [2021-07-13 20:02:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27348312] [2021-07-13 20:02:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27348312] [2021-07-13 20:02:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27348312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371802547] [2021-07-13 20:02:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:44,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:02:44,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 20:02:44,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:44,859 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 [2021-07-13 20:02:44,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:44,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:44,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:02:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371802547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:44,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:44,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:02:44,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694941811] [2021-07-13 20:02:44,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:02:44,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:02:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:02:44,908 INFO L87 Difference]: Start difference. First operand 6184 states and 27458 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:45,372 INFO L93 Difference]: Finished difference Result 16542 states and 75355 transitions. [2021-07-13 20:02:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:02:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:02:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:45,407 INFO L225 Difference]: With dead ends: 16542 [2021-07-13 20:02:45,407 INFO L226 Difference]: Without dead ends: 9202 [2021-07-13 20:02:45,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:02:45,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-07-13 20:02:45,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6580. [2021-07-13 20:02:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 6579 states have (on average 4.455692354461164) internal successors, (29314), 6579 states have internal predecessors, (29314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 29314 transitions. [2021-07-13 20:02:45,603 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 29314 transitions. Word has length 35 [2021-07-13 20:02:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:45,603 INFO L482 AbstractCegarLoop]: Abstraction has 6580 states and 29314 transitions. [2021-07-13 20:02:45,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 29314 transitions. [2021-07-13 20:02:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:45,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:45,618 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:45,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:45,819 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash -277867294, now seen corresponding path program 4 times [2021-07-13 20:02:45,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:45,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405569147] [2021-07-13 20:02:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:45,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:45,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405569147] [2021-07-13 20:02:45,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405569147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:45,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442086042] [2021-07-13 20:02:45,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:45,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:45,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:02:45,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:46,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:02:46,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:46,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-13 20:02:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-07-13 20:02:46,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:46,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-07-13 20:02:46,109 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 [2021-07-13 20:02:46,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:46,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:46,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:02:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442086042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:02:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555263937] [2021-07-13 20:02:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:02:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:02:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:02:46,134 INFO L87 Difference]: Start difference. First operand 6580 states and 29314 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:46,451 INFO L93 Difference]: Finished difference Result 12638 states and 57079 transitions. [2021-07-13 20:02:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:02:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:02:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:46,476 INFO L225 Difference]: With dead ends: 12638 [2021-07-13 20:02:46,476 INFO L226 Difference]: Without dead ends: 6958 [2021-07-13 20:02:46,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:02:46,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6958 states. [2021-07-13 20:02:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6958 to 6767. [2021-07-13 20:02:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6767 states, 6766 states have (on average 4.428909252143068) internal successors, (29966), 6766 states have internal predecessors, (29966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6767 states to 6767 states and 29966 transitions. [2021-07-13 20:02:46,643 INFO L78 Accepts]: Start accepts. Automaton has 6767 states and 29966 transitions. Word has length 35 [2021-07-13 20:02:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:46,643 INFO L482 AbstractCegarLoop]: Abstraction has 6767 states and 29966 transitions. [2021-07-13 20:02:46,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6767 states and 29966 transitions. [2021-07-13 20:02:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:46,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:46,658 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:46,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:46,859 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:46,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:46,860 INFO L82 PathProgramCache]: Analyzing trace with hash -379406552, now seen corresponding path program 5 times [2021-07-13 20:02:46,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:46,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507262807] [2021-07-13 20:02:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:46,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507262807] [2021-07-13 20:02:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507262807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419606350] [2021-07-13 20:02:46,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:47,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:02:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:47,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:02:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:02:47,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:47,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-13 20:02:47,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2021-07-13 20:02:47,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:47,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:16 [2021-07-13 20:02:47,192 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 [2021-07-13 20:02:47,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:47,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:47,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:02:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:47,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419606350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:47,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:47,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-07-13 20:02:47,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986751093] [2021-07-13 20:02:47,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:02:47,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:02:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:02:47,226 INFO L87 Difference]: Start difference. First operand 6767 states and 29966 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:47,704 INFO L93 Difference]: Finished difference Result 15857 states and 71535 transitions. [2021-07-13 20:02:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:02:47,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:02:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:47,726 INFO L225 Difference]: With dead ends: 15857 [2021-07-13 20:02:47,727 INFO L226 Difference]: Without dead ends: 6962 [2021-07-13 20:02:47,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:02:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2021-07-13 20:02:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 6907. [2021-07-13 20:02:47,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6907 states, 6906 states have (on average 4.406602953953084) internal successors, (30432), 6906 states have internal predecessors, (30432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6907 states to 6907 states and 30432 transitions. [2021-07-13 20:02:47,887 INFO L78 Accepts]: Start accepts. Automaton has 6907 states and 30432 transitions. Word has length 35 [2021-07-13 20:02:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:47,887 INFO L482 AbstractCegarLoop]: Abstraction has 6907 states and 30432 transitions. [2021-07-13 20:02:47,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 6907 states and 30432 transitions. [2021-07-13 20:02:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:47,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:47,902 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:48,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,104 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 702142476, now seen corresponding path program 6 times [2021-07-13 20:02:48,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:48,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819458242] [2021-07-13 20:02:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:48,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819458242] [2021-07-13 20:02:48,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819458242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:48,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491891700] [2021-07-13 20:02:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:48,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:48,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:02:48,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:48,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:02:48,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:48,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:14 [2021-07-13 20:02:48,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2021-07-13 20:02:48,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:48,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:9 [2021-07-13 20:02:48,427 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 [2021-07-13 20:02:48,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:48,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:48,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:02:48,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:02:48,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491891700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:48,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:48,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:02:48,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82461452] [2021-07-13 20:02:48,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:02:48,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:48,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:02:48,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:02:48,451 INFO L87 Difference]: Start difference. First operand 6907 states and 30432 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:48,726 INFO L93 Difference]: Finished difference Result 12818 states and 57681 transitions. [2021-07-13 20:02:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:02:48,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 20:02:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:48,748 INFO L225 Difference]: With dead ends: 12818 [2021-07-13 20:02:48,748 INFO L226 Difference]: Without dead ends: 7068 [2021-07-13 20:02:48,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:02:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7068 states. [2021-07-13 20:02:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7068 to 6751. [2021-07-13 20:02:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6750 states have (on average 4.431111111111111) internal successors, (29910), 6750 states have internal predecessors, (29910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 29910 transitions. [2021-07-13 20:02:48,884 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 29910 transitions. Word has length 35 [2021-07-13 20:02:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:48,884 INFO L482 AbstractCegarLoop]: Abstraction has 6751 states and 29910 transitions. [2021-07-13 20:02:48,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 29910 transitions. [2021-07-13 20:02:48,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 20:02:48,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:48,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:49,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:49,100 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:49,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1637524792, now seen corresponding path program 7 times [2021-07-13 20:02:49,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:49,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000987470] [2021-07-13 20:02:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:49,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:49,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000987470] [2021-07-13 20:02:49,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000987470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:49,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809684662] [2021-07-13 20:02:49,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 20:02:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:49,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2021-07-13 20:02:49,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:49,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:11 [2021-07-13 20:02:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 20:02:49,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:02:49,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:02:49,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:5 [2021-07-13 20:02:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809684662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:49,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:49,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:02:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159407742] [2021-07-13 20:02:49,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:02:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:02:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:02:49,340 INFO L87 Difference]: Start difference. First operand 6751 states and 29910 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2021-07-13 20:02:49,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:49,628 INFO L93 Difference]: Finished difference Result 15889 states and 71529 transitions. [2021-07-13 20:02:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:02:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 35 [2021-07-13 20:02:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:49,660 INFO L225 Difference]: With dead ends: 15889 [2021-07-13 20:02:49,660 INFO L226 Difference]: Without dead ends: 10209 [2021-07-13 20:02:49,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:02:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2021-07-13 20:02:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 6982. [2021-07-13 20:02:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6982 states, 6981 states have (on average 4.426729694886119) internal successors, (30903), 6981 states have internal predecessors, (30903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6982 states to 6982 states and 30903 transitions. [2021-07-13 20:02:49,820 INFO L78 Accepts]: Start accepts. Automaton has 6982 states and 30903 transitions. Word has length 35 [2021-07-13 20:02:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:49,820 INFO L482 AbstractCegarLoop]: Abstraction has 6982 states and 30903 transitions. [2021-07-13 20:02:49,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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) [2021-07-13 20:02:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6982 states and 30903 transitions. [2021-07-13 20:02:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:49,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:49,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:50,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:02:50,036 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:50,036 INFO L82 PathProgramCache]: Analyzing trace with hash 711566540, now seen corresponding path program 8 times [2021-07-13 20:02:50,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:50,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751521906] [2021-07-13 20:02:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:50,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:50,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751521906] [2021-07-13 20:02:50,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751521906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065080741] [2021-07-13 20:02:50,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:50,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:02:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:50,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065080741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:50,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:02:50,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120527155] [2021-07-13 20:02:50,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:02:50,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:50,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:02:50,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:02:50,159 INFO L87 Difference]: Start difference. First operand 6982 states and 30903 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:50,317 INFO L93 Difference]: Finished difference Result 13835 states and 61629 transitions. [2021-07-13 20:02:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:02:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:50,364 INFO L225 Difference]: With dead ends: 13835 [2021-07-13 20:02:50,364 INFO L226 Difference]: Without dead ends: 13746 [2021-07-13 20:02:50,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13746 states. [2021-07-13 20:02:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13746 to 10302. [2021-07-13 20:02:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10302 states, 10301 states have (on average 4.570138821473643) internal successors, (47077), 10301 states have internal predecessors, (47077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10302 states to 10302 states and 47077 transitions. [2021-07-13 20:02:50,619 INFO L78 Accepts]: Start accepts. Automaton has 10302 states and 47077 transitions. Word has length 37 [2021-07-13 20:02:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:50,619 INFO L482 AbstractCegarLoop]: Abstraction has 10302 states and 47077 transitions. [2021-07-13 20:02:50,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10302 states and 47077 transitions. [2021-07-13 20:02:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:50,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:50,643 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:50,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:02:50,843 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1970707116, now seen corresponding path program 9 times [2021-07-13 20:02:50,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:50,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427461935] [2021-07-13 20:02:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:50,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427461935] [2021-07-13 20:02:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427461935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265004535] [2021-07-13 20:02:50,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:50,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:02:50,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:50,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:02:50,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:50,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265004535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:50,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:50,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:02:50,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434774359] [2021-07-13 20:02:50,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:02:50,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:02:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:50,986 INFO L87 Difference]: Start difference. First operand 10302 states and 47077 transitions. Second operand has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:51,766 INFO L93 Difference]: Finished difference Result 40272 states and 177348 transitions. [2021-07-13 20:02:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:02:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:02:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:51,932 INFO L225 Difference]: With dead ends: 40272 [2021-07-13 20:02:51,932 INFO L226 Difference]: Without dead ends: 40272 [2021-07-13 20:02:51,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=475, Invalid=1595, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:02:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-07-13 20:02:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 16146. [2021-07-13 20:02:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16146 states, 16145 states have (on average 4.708082997832146) internal successors, (76012), 16145 states have internal predecessors, (76012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 76012 transitions. [2021-07-13 20:02:52,692 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 76012 transitions. Word has length 37 [2021-07-13 20:02:52,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:52,692 INFO L482 AbstractCegarLoop]: Abstraction has 16146 states and 76012 transitions. [2021-07-13 20:02:52,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.3) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:52,692 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 76012 transitions. [2021-07-13 20:02:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:52,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:52,732 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:52,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:02:52,932 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:52,933 INFO L82 PathProgramCache]: Analyzing trace with hash -292754666, now seen corresponding path program 10 times [2021-07-13 20:02:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:52,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899506042] [2021-07-13 20:02:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:52,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899506042] [2021-07-13 20:02:52,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899506042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:52,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337567676] [2021-07-13 20:02:52,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:53,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:02:53,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:02:53,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:53,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337567676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:53,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:53,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:02:53,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673070158] [2021-07-13 20:02:53,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:02:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:02:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:02:53,043 INFO L87 Difference]: Start difference. First operand 16146 states and 76012 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:53,269 INFO L93 Difference]: Finished difference Result 24425 states and 114052 transitions. [2021-07-13 20:02:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:02:53,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have 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 [2021-07-13 20:02:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:53,369 INFO L225 Difference]: With dead ends: 24425 [2021-07-13 20:02:53,369 INFO L226 Difference]: Without dead ends: 24375 [2021-07-13 20:02:53,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:02:53,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24375 states. [2021-07-13 20:02:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24375 to 18707. [2021-07-13 20:02:53,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18707 states, 18706 states have (on average 4.823265262482626) internal successors, (90224), 18706 states have internal predecessors, (90224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18707 states to 18707 states and 90224 transitions. [2021-07-13 20:02:53,901 INFO L78 Accepts]: Start accepts. Automaton has 18707 states and 90224 transitions. Word has length 37 [2021-07-13 20:02:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:53,901 INFO L482 AbstractCegarLoop]: Abstraction has 18707 states and 90224 transitions. [2021-07-13 20:02:53,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 18707 states and 90224 transitions. [2021-07-13 20:02:53,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:53,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:53,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:54,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:54,153 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash 119821430, now seen corresponding path program 11 times [2021-07-13 20:02:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:54,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544334969] [2021-07-13 20:02:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:54,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:54,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544334969] [2021-07-13 20:02:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544334969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:54,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41264701] [2021-07-13 20:02:54,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:54,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:02:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:54,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:02:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:54,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41264701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:54,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:54,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-07-13 20:02:54,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010671161] [2021-07-13 20:02:54,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:02:54,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:02:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:02:54,277 INFO L87 Difference]: Start difference. First operand 18707 states and 90224 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:54,525 INFO L93 Difference]: Finished difference Result 23270 states and 108541 transitions. [2021-07-13 20:02:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:02:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:02:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:54,617 INFO L225 Difference]: With dead ends: 23270 [2021-07-13 20:02:54,618 INFO L226 Difference]: Without dead ends: 23182 [2021-07-13 20:02:54,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23182 states. [2021-07-13 20:02:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23182 to 18276. [2021-07-13 20:02:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18276 states, 18275 states have (on average 4.814938440492476) internal successors, (87993), 18275 states have internal predecessors, (87993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18276 states to 18276 states and 87993 transitions. [2021-07-13 20:02:55,137 INFO L78 Accepts]: Start accepts. Automaton has 18276 states and 87993 transitions. Word has length 37 [2021-07-13 20:02:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:55,137 INFO L482 AbstractCegarLoop]: Abstraction has 18276 states and 87993 transitions. [2021-07-13 20:02:55,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 18276 states and 87993 transitions. [2021-07-13 20:02:55,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:55,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:55,184 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:55,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:02:55,385 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:55,385 INFO L82 PathProgramCache]: Analyzing trace with hash -757299736, now seen corresponding path program 12 times [2021-07-13 20:02:55,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:55,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824208788] [2021-07-13 20:02:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:55,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:55,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824208788] [2021-07-13 20:02:55,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824208788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144043577] [2021-07-13 20:02:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:55,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:02:55,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:02:55,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:55,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144043577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:55,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:55,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:02:55,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702398637] [2021-07-13 20:02:55,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:02:55,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:55,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:02:55,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:02:55,513 INFO L87 Difference]: Start difference. First operand 18276 states and 87993 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:55,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:55,904 INFO L93 Difference]: Finished difference Result 24535 states and 114793 transitions. [2021-07-13 20:02:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:55,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:02:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:56,007 INFO L225 Difference]: With dead ends: 24535 [2021-07-13 20:02:56,007 INFO L226 Difference]: Without dead ends: 24535 [2021-07-13 20:02:56,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:02:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24535 states. [2021-07-13 20:02:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24535 to 20564. [2021-07-13 20:02:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20564 states, 20563 states have (on average 4.77133686718864) internal successors, (98113), 20563 states have internal predecessors, (98113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20564 states to 20564 states and 98113 transitions. [2021-07-13 20:02:56,798 INFO L78 Accepts]: Start accepts. Automaton has 20564 states and 98113 transitions. Word has length 37 [2021-07-13 20:02:56,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:56,798 INFO L482 AbstractCegarLoop]: Abstraction has 20564 states and 98113 transitions. [2021-07-13 20:02:56,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:56,799 INFO L276 IsEmpty]: Start isEmpty. Operand 20564 states and 98113 transitions. [2021-07-13 20:02:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:56,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:56,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:57,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:02:57,057 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:57,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1051419172, now seen corresponding path program 13 times [2021-07-13 20:02:57,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:57,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748876734] [2021-07-13 20:02:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:57,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748876734] [2021-07-13 20:02:57,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748876734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:57,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210304184] [2021-07-13 20:02:57,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:02:57,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210304184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:57,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:57,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 20:02:57,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383155209] [2021-07-13 20:02:57,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:02:57,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:57,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:02:57,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:02:57,183 INFO L87 Difference]: Start difference. First operand 20564 states and 98113 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:02:57,767 INFO L93 Difference]: Finished difference Result 43836 states and 210360 transitions. [2021-07-13 20:02:57,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:02:57,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:02:57,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:02:57,973 INFO L225 Difference]: With dead ends: 43836 [2021-07-13 20:02:57,974 INFO L226 Difference]: Without dead ends: 40727 [2021-07-13 20:02:57,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40727 states. [2021-07-13 20:02:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40727 to 31768. [2021-07-13 20:02:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31768 states, 31767 states have (on average 4.9342084553152645) internal successors, (156745), 31767 states have internal predecessors, (156745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31768 states to 31768 states and 156745 transitions. [2021-07-13 20:02:59,137 INFO L78 Accepts]: Start accepts. Automaton has 31768 states and 156745 transitions. Word has length 37 [2021-07-13 20:02:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:02:59,137 INFO L482 AbstractCegarLoop]: Abstraction has 31768 states and 156745 transitions. [2021-07-13 20:02:59,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 31768 states and 156745 transitions. [2021-07-13 20:02:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:02:59,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:02:59,227 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:02:59,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:59,428 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:02:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:02:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -200971488, now seen corresponding path program 14 times [2021-07-13 20:02:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:02:59,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102390948] [2021-07-13 20:02:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:02:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:02:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:02:59,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:02:59,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102390948] [2021-07-13 20:02:59,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102390948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:59,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461021589] [2021-07-13 20:02:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:59,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:02:59,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:02:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:02:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:02:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:02:59,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461021589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:02:59,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:02:59,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 20:02:59,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360800018] [2021-07-13 20:02:59,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:02:59,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:02:59,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:02:59,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:02:59,569 INFO L87 Difference]: Start difference. First operand 31768 states and 156745 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:00,949 INFO L93 Difference]: Finished difference Result 81749 states and 393631 transitions. [2021-07-13 20:03:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:03:00,949 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:01,558 INFO L225 Difference]: With dead ends: 81749 [2021-07-13 20:03:01,559 INFO L226 Difference]: Without dead ends: 81493 [2021-07-13 20:03:01,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:03:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81493 states. [2021-07-13 20:03:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81493 to 46870. [2021-07-13 20:03:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46870 states, 46869 states have (on average 5.118991230877552) internal successors, (239922), 46869 states have internal predecessors, (239922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46870 states to 46870 states and 239922 transitions. [2021-07-13 20:03:04,005 INFO L78 Accepts]: Start accepts. Automaton has 46870 states and 239922 transitions. Word has length 37 [2021-07-13 20:03:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:04,005 INFO L482 AbstractCegarLoop]: Abstraction has 46870 states and 239922 transitions. [2021-07-13 20:03:04,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 46870 states and 239922 transitions. [2021-07-13 20:03:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:04,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:04,427 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:04,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 20:03:04,629 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1976947100, now seen corresponding path program 15 times [2021-07-13 20:03:04,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:04,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514841764] [2021-07-13 20:03:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:04,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:04,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514841764] [2021-07-13 20:03:04,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514841764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940588347] [2021-07-13 20:03:04,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:04,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:03:04,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:04,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:04,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940588347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:04,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:04,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:03:04,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105407799] [2021-07-13 20:03:04,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:04,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:04,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:04,726 INFO L87 Difference]: Start difference. First operand 46870 states and 239922 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:05,611 INFO L93 Difference]: Finished difference Result 72260 states and 366738 transitions. [2021-07-13 20:03:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:03:05,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:06,212 INFO L225 Difference]: With dead ends: 72260 [2021-07-13 20:03:06,212 INFO L226 Difference]: Without dead ends: 71607 [2021-07-13 20:03:06,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:03:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71607 states. [2021-07-13 20:03:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71607 to 60533. [2021-07-13 20:03:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60533 states, 60532 states have (on average 5.215918852838168) internal successors, (315730), 60532 states have internal predecessors, (315730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:09,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60533 states to 60533 states and 315730 transitions. [2021-07-13 20:03:09,027 INFO L78 Accepts]: Start accepts. Automaton has 60533 states and 315730 transitions. Word has length 37 [2021-07-13 20:03:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:09,027 INFO L482 AbstractCegarLoop]: Abstraction has 60533 states and 315730 transitions. [2021-07-13 20:03:09,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 60533 states and 315730 transitions. [2021-07-13 20:03:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:09,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:09,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:09,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:09,433 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1193946592, now seen corresponding path program 16 times [2021-07-13 20:03:09,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:09,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082709509] [2021-07-13 20:03:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:09,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:09,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082709509] [2021-07-13 20:03:09,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082709509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:09,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284061317] [2021-07-13 20:03:09,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:09,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:03:09,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:09,829 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 1 [2021-07-13 20:03:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:09,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284061317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:09,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:09,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 20:03:09,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758931666] [2021-07-13 20:03:09,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:09,850 INFO L87 Difference]: Start difference. First operand 60533 states and 315730 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:10,802 INFO L93 Difference]: Finished difference Result 76219 states and 383006 transitions. [2021-07-13 20:03:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:03:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:10,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:11,210 INFO L225 Difference]: With dead ends: 76219 [2021-07-13 20:03:11,211 INFO L226 Difference]: Without dead ends: 75633 [2021-07-13 20:03:11,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:03:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75633 states. [2021-07-13 20:03:13,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75633 to 60771. [2021-07-13 20:03:13,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60771 states, 60770 states have (on average 5.169919368109264) internal successors, (314176), 60770 states have internal predecessors, (314176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60771 states to 60771 states and 314176 transitions. [2021-07-13 20:03:13,739 INFO L78 Accepts]: Start accepts. Automaton has 60771 states and 314176 transitions. Word has length 37 [2021-07-13 20:03:13,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:13,739 INFO L482 AbstractCegarLoop]: Abstraction has 60771 states and 314176 transitions. [2021-07-13 20:03:13,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:13,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60771 states and 314176 transitions. [2021-07-13 20:03:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:13,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:13,933 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:14,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 20:03:14,135 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:14,135 INFO L82 PathProgramCache]: Analyzing trace with hash 900001624, now seen corresponding path program 17 times [2021-07-13 20:03:14,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:14,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329691157] [2021-07-13 20:03:14,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:14,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:14,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329691157] [2021-07-13 20:03:14,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329691157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:14,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439371265] [2021-07-13 20:03:14,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:03:14,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:03:14,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:14,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:14,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:14,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439371265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:14,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:14,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-13 20:03:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969156788] [2021-07-13 20:03:14,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:03:14,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:14,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:03:14,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:03:14,243 INFO L87 Difference]: Start difference. First operand 60771 states and 314176 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:15,402 INFO L93 Difference]: Finished difference Result 83670 states and 426544 transitions. [2021-07-13 20:03:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:03:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:15,863 INFO L225 Difference]: With dead ends: 83670 [2021-07-13 20:03:15,863 INFO L226 Difference]: Without dead ends: 83594 [2021-07-13 20:03:15,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:16,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83594 states. [2021-07-13 20:03:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83594 to 70109. [2021-07-13 20:03:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70109 states, 70108 states have (on average 5.258372796257203) internal successors, (368654), 70108 states have internal predecessors, (368654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70109 states to 70109 states and 368654 transitions. [2021-07-13 20:03:18,698 INFO L78 Accepts]: Start accepts. Automaton has 70109 states and 368654 transitions. Word has length 37 [2021-07-13 20:03:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:18,698 INFO L482 AbstractCegarLoop]: Abstraction has 70109 states and 368654 transitions. [2021-07-13 20:03:18,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 70109 states and 368654 transitions. [2021-07-13 20:03:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:19,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:19,262 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:19,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:03:19,479 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1766537048, now seen corresponding path program 18 times [2021-07-13 20:03:19,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:19,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608741413] [2021-07-13 20:03:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:19,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:19,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608741413] [2021-07-13 20:03:19,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608741413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999219425] [2021-07-13 20:03:19,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:19,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:03:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:03:19,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999219425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:19,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:19,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 20:03:19,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631246389] [2021-07-13 20:03:19,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:03:19,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:03:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:19,635 INFO L87 Difference]: Start difference. First operand 70109 states and 368654 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:21,295 INFO L93 Difference]: Finished difference Result 107900 states and 542604 transitions. [2021-07-13 20:03:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:03:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:21,934 INFO L225 Difference]: With dead ends: 107900 [2021-07-13 20:03:21,934 INFO L226 Difference]: Without dead ends: 107195 [2021-07-13 20:03:21,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:03:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107195 states. [2021-07-13 20:03:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107195 to 72498. [2021-07-13 20:03:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72498 states, 72497 states have (on average 5.256824420320841) internal successors, (381104), 72497 states have internal predecessors, (381104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72498 states to 72498 states and 381104 transitions. [2021-07-13 20:03:26,193 INFO L78 Accepts]: Start accepts. Automaton has 72498 states and 381104 transitions. Word has length 37 [2021-07-13 20:03:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:26,193 INFO L482 AbstractCegarLoop]: Abstraction has 72498 states and 381104 transitions. [2021-07-13 20:03:26,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 72498 states and 381104 transitions. [2021-07-13 20:03:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:03:26,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:26,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:26,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:26,653 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1164777964, now seen corresponding path program 19 times [2021-07-13 20:03:26,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:26,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950969147] [2021-07-13 20:03:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:26,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:26,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950969147] [2021-07-13 20:03:26,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950969147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:26,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273052557] [2021-07-13 20:03:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:26,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:03:26,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:03:26,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273052557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:26,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:26,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 20:03:26,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467968573] [2021-07-13 20:03:26,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:03:26,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:03:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:03:26,773 INFO L87 Difference]: Start difference. First operand 72498 states and 381104 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:28,122 INFO L93 Difference]: Finished difference Result 89407 states and 452990 transitions. [2021-07-13 20:03:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:03:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:03:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:28,686 INFO L225 Difference]: With dead ends: 89407 [2021-07-13 20:03:28,686 INFO L226 Difference]: Without dead ends: 87153 [2021-07-13 20:03:28,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:03:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87153 states. [2021-07-13 20:03:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87153 to 72603. [2021-07-13 20:03:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72603 states, 72602 states have (on average 5.200008264235145) internal successors, (377531), 72602 states have internal predecessors, (377531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72603 states to 72603 states and 377531 transitions. [2021-07-13 20:03:31,964 INFO L78 Accepts]: Start accepts. Automaton has 72603 states and 377531 transitions. Word has length 37 [2021-07-13 20:03:31,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:31,964 INFO L482 AbstractCegarLoop]: Abstraction has 72603 states and 377531 transitions. [2021-07-13 20:03:31,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:31,964 INFO L276 IsEmpty]: Start isEmpty. Operand 72603 states and 377531 transitions. [2021-07-13 20:03:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:03:32,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:32,224 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:32,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:03:32,424 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:32,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash -211695292, now seen corresponding path program 20 times [2021-07-13 20:03:32,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:32,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993513590] [2021-07-13 20:03:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:32,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:32,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993513590] [2021-07-13 20:03:32,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993513590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:32,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089300533] [2021-07-13 20:03:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:03:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:03:32,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:03:32,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089300533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:32,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:32,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:03:32,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370313384] [2021-07-13 20:03:32,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:03:32,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:32,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:03:32,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:03:32,565 INFO L87 Difference]: Start difference. First operand 72603 states and 377531 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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) [2021-07-13 20:03:36,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:36,441 INFO L93 Difference]: Finished difference Result 269990 states and 1363141 transitions. [2021-07-13 20:03:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:03:36,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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 39 [2021-07-13 20:03:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:39,181 INFO L225 Difference]: With dead ends: 269990 [2021-07-13 20:03:39,181 INFO L226 Difference]: Without dead ends: 264550 [2021-07-13 20:03:39,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=286, Invalid=974, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:03:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264550 states. [2021-07-13 20:03:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264550 to 140265. [2021-07-13 20:03:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140265 states, 140264 states have (on average 5.258983060514458) internal successors, (737646), 140264 states have internal predecessors, (737646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140265 states to 140265 states and 737646 transitions. [2021-07-13 20:03:47,667 INFO L78 Accepts]: Start accepts. Automaton has 140265 states and 737646 transitions. Word has length 39 [2021-07-13 20:03:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:03:47,667 INFO L482 AbstractCegarLoop]: Abstraction has 140265 states and 737646 transitions. [2021-07-13 20:03:47,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 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) [2021-07-13 20:03:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 140265 states and 737646 transitions. [2021-07-13 20:03:48,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:03:48,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:03:48,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:03:48,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:48,731 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:03:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:03:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash 90649028, now seen corresponding path program 21 times [2021-07-13 20:03:48,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:03:48,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576132272] [2021-07-13 20:03:48,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:03:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:03:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:48,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:03:48,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576132272] [2021-07-13 20:03:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576132272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070892863] [2021-07-13 20:03:48,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:03:48,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:03:48,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:03:48,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:03:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:03:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:03:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070892863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:03:48,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:03:48,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 20:03:48,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023552276] [2021-07-13 20:03:48,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:03:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:03:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:03:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:03:48,843 INFO L87 Difference]: Start difference. First operand 140265 states and 737646 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:03:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:03:53,345 INFO L93 Difference]: Finished difference Result 288917 states and 1521091 transitions. [2021-07-13 20:03:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:03:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:03:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:03:57,180 INFO L225 Difference]: With dead ends: 288917 [2021-07-13 20:03:57,196 INFO L226 Difference]: Without dead ends: 278397 [2021-07-13 20:03:57,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:03:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278397 states. [2021-07-13 20:04:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278397 to 227597. [2021-07-13 20:04:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227597 states, 227596 states have (on average 5.399273273695496) internal successors, (1228853), 227596 states have internal predecessors, (1228853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227597 states to 227597 states and 1228853 transitions. [2021-07-13 20:04:09,433 INFO L78 Accepts]: Start accepts. Automaton has 227597 states and 1228853 transitions. Word has length 39 [2021-07-13 20:04:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:09,433 INFO L482 AbstractCegarLoop]: Abstraction has 227597 states and 1228853 transitions. [2021-07-13 20:04:09,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 227597 states and 1228853 transitions. [2021-07-13 20:04:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:04:10,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:10,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:11,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:04:11,007 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:04:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:11,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1418353280, now seen corresponding path program 22 times [2021-07-13 20:04:11,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:11,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287725017] [2021-07-13 20:04:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:04:11,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:11,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287725017] [2021-07-13 20:04:11,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287725017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:11,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204362518] [2021-07-13 20:04:11,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:11,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:04:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:04:11,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:04:11,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204362518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:11,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:11,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 20:04:11,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771880525] [2021-07-13 20:04:11,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:11,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:11,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:11,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:11,116 INFO L87 Difference]: Start difference. First operand 227597 states and 1228853 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:11,644 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-07-13 20:04:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:18,470 INFO L93 Difference]: Finished difference Result 406943 states and 2117109 transitions. [2021-07-13 20:04:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:04:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:04:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:04:25,439 INFO L225 Difference]: With dead ends: 406943 [2021-07-13 20:04:25,439 INFO L226 Difference]: Without dead ends: 401694 [2021-07-13 20:04:25,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:04:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401694 states. [2021-07-13 20:04:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401694 to 259017. [2021-07-13 20:04:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259017 states, 259016 states have (on average 5.44583732279087) internal successors, (1410559), 259016 states have internal predecessors, (1410559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259017 states to 259017 states and 1410559 transitions. [2021-07-13 20:04:43,531 INFO L78 Accepts]: Start accepts. Automaton has 259017 states and 1410559 transitions. Word has length 39 [2021-07-13 20:04:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:04:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 259017 states and 1410559 transitions. [2021-07-13 20:04:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 259017 states and 1410559 transitions. [2021-07-13 20:04:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:04:45,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:04:45,985 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:04:46,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:04:46,202 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-07-13 20:04:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:04:46,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1394489208, now seen corresponding path program 23 times [2021-07-13 20:04:46,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:04:46,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926601224] [2021-07-13 20:04:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:04:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:04:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:04:46,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:04:46,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926601224] [2021-07-13 20:04:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926601224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888440941] [2021-07-13 20:04:46,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:04:46,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:04:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:04:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:04:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:04:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:04:46,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888440941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:04:46,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:04:46,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 20:04:46,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288872961] [2021-07-13 20:04:46,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:04:46,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:04:46,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:04:46,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:04:46,450 INFO L87 Difference]: Start difference. First operand 259017 states and 1410559 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:04:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:04:55,967 INFO L93 Difference]: Finished difference Result 459982 states and 2441594 transitions. [2021-07-13 20:04:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:04:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:04:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted.