/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3-proof.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:34:51,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:34:51,976 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:34:52,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 17:34:52,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:34:52,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:34:52,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:34:52,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:34:52,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:34:52,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:34:52,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:34:52,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:34:52,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:34:52,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:34:52,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:34:52,069 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 [2021-02-19 17:34:52,102 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:34:52,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:34:52,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:34:52,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:34:52,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:34:52,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:34:52,106 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:34:52,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:34:52,106 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:34:52,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:34:52,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:34:52,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:34:52,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:34:52,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:34:52,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:34:52,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:34:52,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:34:52,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:34:52,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:34:52,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:34:52,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:34:52,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:34:52,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:34:52,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:34:52,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:34:52,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:34:52,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:34:52,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:34:52,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:34:52,445 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:34:52,447 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:34:52,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3-proof.wvr.bpl [2021-02-19 17:34:52,448 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp2x3-proof.wvr.bpl' [2021-02-19 17:34:52,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:34:52,479 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:34:52,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:34:52,481 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:34:52,481 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:34:52,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,498 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:34:52,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:34:52,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:34:52,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:34:52,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/1) ... [2021-02-19 17:34:52,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:34:52,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:34:52,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:34:52,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:34:52,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (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 [2021-02-19 17:34:52,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:34:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:34:52,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:34:52,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:34:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:34:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:34:52,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:34:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:34:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:34:52,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 17:34:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 17:34:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 17:34:52,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-02-19 17:34:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-02-19 17:34:52,578 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-02-19 17:34:52,578 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 17:34:52,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:34:52,733 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:34:52,750 INFO L202 PluginConnector]: Adding new model exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:34:52 BoogieIcfgContainer [2021-02-19 17:34:52,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:34:52,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:34:52,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:34:52,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:34:52,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:34:52" (1/2) ... [2021-02-19 17:34:52,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca55859 and model type exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:34:52, skipping insertion in model container [2021-02-19 17:34:52,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp2x3-proof.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:34:52" (2/2) ... [2021-02-19 17:34:52,755 INFO L111 eAbstractionObserver]: Analyzing ICFG exp2x3-proof.wvr.bpl [2021-02-19 17:34:52,759 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:34:52,759 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:34:52,767 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:34:52,767 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:34:52,846 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-02-19 17:34:52,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-02-19 17:34:52,872 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:34:52,872 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:34:52,873 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:34:52,873 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:34:52,873 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:34:52,873 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:34:52,873 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:34:52,873 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:34:52,880 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-02-19 17:34:52,922 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:34:52,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:52,942 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:52,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:52,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1934394026, now seen corresponding path program 1 times [2021-02-19 17:34:52,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:52,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704802468] [2021-02-19 17:34:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:53,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704802468] [2021-02-19 17:34:53,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:53,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:34:53,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555843082] [2021-02-19 17:34:53,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:34:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:53,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:34:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:34:53,100 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:53,206 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-02-19 17:34:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:34:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 17:34:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:53,233 INFO L225 Difference]: With dead ends: 854 [2021-02-19 17:34:53,233 INFO L226 Difference]: Without dead ends: 823 [2021-02-19 17:34:53,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:34:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-02-19 17:34:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-02-19 17:34:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-02-19 17:34:53,330 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-02-19 17:34:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:53,332 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-02-19 17:34:53,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-02-19 17:34:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:53,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:53,341 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:53,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:34:53,341 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash -197222890, now seen corresponding path program 1 times [2021-02-19 17:34:53,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:53,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767706625] [2021-02-19 17:34:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:53,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767706625] [2021-02-19 17:34:53,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433458112] [2021-02-19 17:34:53,421 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 [2021-02-19 17:34:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:53,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:34:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:53,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:53,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-02-19 17:34:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840278765] [2021-02-19 17:34:53,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:34:53,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:34:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:34:53,540 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:53,635 INFO L93 Difference]: Finished difference Result 1354 states and 5079 transitions. [2021-02-19 17:34:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:34:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:53,645 INFO L225 Difference]: With dead ends: 1354 [2021-02-19 17:34:53,645 INFO L226 Difference]: Without dead ends: 1354 [2021-02-19 17:34:53,646 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:34:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-02-19 17:34:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 687. [2021-02-19 17:34:53,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.956268221574344) internal successors, (2714), 686 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2714 transitions. [2021-02-19 17:34:53,679 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2714 transitions. Word has length 21 [2021-02-19 17:34:53,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:53,680 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 2714 transitions. [2021-02-19 17:34:53,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2714 transitions. [2021-02-19 17:34:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:53,682 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:53,682 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:53,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 17:34:53,898 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1859794194, now seen corresponding path program 1 times [2021-02-19 17:34:53,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:53,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129958397] [2021-02-19 17:34:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:53,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129958397] [2021-02-19 17:34:53,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:53,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:53,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318838919] [2021-02-19 17:34:53,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:53,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:53,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:53,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:53,934 INFO L87 Difference]: Start difference. First operand 687 states and 2714 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:53,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:53,992 INFO L93 Difference]: Finished difference Result 973 states and 3608 transitions. [2021-02-19 17:34:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:34:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:53,999 INFO L225 Difference]: With dead ends: 973 [2021-02-19 17:34:53,999 INFO L226 Difference]: Without dead ends: 953 [2021-02-19 17:34:53,999 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-02-19 17:34:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 775. [2021-02-19 17:34:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.8359173126614987) internal successors, (2969), 774 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2969 transitions. [2021-02-19 17:34:54,026 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2969 transitions. Word has length 21 [2021-02-19 17:34:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:54,027 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2969 transitions. [2021-02-19 17:34:54,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2969 transitions. [2021-02-19 17:34:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:54,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:54,029 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:54,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 17:34:54,030 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1865797288, now seen corresponding path program 1 times [2021-02-19 17:34:54,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:54,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300153640] [2021-02-19 17:34:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300153640] [2021-02-19 17:34:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786915359] [2021-02-19 17:34:54,058 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 [2021-02-19 17:34:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:54,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-02-19 17:34:54,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:54,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:54,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-02-19 17:34:54,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976550501] [2021-02-19 17:34:54,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:54,167 INFO L87 Difference]: Start difference. First operand 775 states and 2969 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:54,231 INFO L93 Difference]: Finished difference Result 1748 states and 6634 transitions. [2021-02-19 17:34:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:54,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:54,243 INFO L225 Difference]: With dead ends: 1748 [2021-02-19 17:34:54,243 INFO L226 Difference]: Without dead ends: 1748 [2021-02-19 17:34:54,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-02-19 17:34:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 931. [2021-02-19 17:34:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.968817204301075) internal successors, (3691), 930 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3691 transitions. [2021-02-19 17:34:54,329 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3691 transitions. Word has length 21 [2021-02-19 17:34:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:54,329 INFO L480 AbstractCegarLoop]: Abstraction has 931 states and 3691 transitions. [2021-02-19 17:34:54,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3691 transitions. [2021-02-19 17:34:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:54,336 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:54,336 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:54,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:54,550 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash 371319000, now seen corresponding path program 1 times [2021-02-19 17:34:54,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:54,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624710837] [2021-02-19 17:34:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:54,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624710837] [2021-02-19 17:34:54,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:54,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:54,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489997690] [2021-02-19 17:34:54,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:54,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:54,593 INFO L87 Difference]: Start difference. First operand 931 states and 3691 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:54,651 INFO L93 Difference]: Finished difference Result 1477 states and 5627 transitions. [2021-02-19 17:34:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:54,662 INFO L225 Difference]: With dead ends: 1477 [2021-02-19 17:34:54,662 INFO L226 Difference]: Without dead ends: 1453 [2021-02-19 17:34:54,663 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-02-19 17:34:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 985. [2021-02-19 17:34:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.9227642276422765) internal successors, (3860), 984 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3860 transitions. [2021-02-19 17:34:54,703 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3860 transitions. Word has length 21 [2021-02-19 17:34:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:54,704 INFO L480 AbstractCegarLoop]: Abstraction has 985 states and 3860 transitions. [2021-02-19 17:34:54,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3860 transitions. [2021-02-19 17:34:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:54,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:54,709 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:54,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 17:34:54,709 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:54,710 INFO L82 PathProgramCache]: Analyzing trace with hash 329500888, now seen corresponding path program 2 times [2021-02-19 17:34:54,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:54,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525776738] [2021-02-19 17:34:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:54,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525776738] [2021-02-19 17:34:54,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:54,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436472679] [2021-02-19 17:34:54,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:54,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:54,799 INFO L87 Difference]: Start difference. First operand 985 states and 3860 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:54,855 INFO L93 Difference]: Finished difference Result 1520 states and 5831 transitions. [2021-02-19 17:34:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:54,865 INFO L225 Difference]: With dead ends: 1520 [2021-02-19 17:34:54,866 INFO L226 Difference]: Without dead ends: 1520 [2021-02-19 17:34:54,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-02-19 17:34:54,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1119. [2021-02-19 17:34:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.952593917710197) internal successors, (4419), 1118 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 4419 transitions. [2021-02-19 17:34:54,902 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 4419 transitions. Word has length 21 [2021-02-19 17:34:54,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:54,903 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 4419 transitions. [2021-02-19 17:34:54,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 4419 transitions. [2021-02-19 17:34:54,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:54,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:54,906 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:54,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 17:34:54,907 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:54,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:54,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1318967568, now seen corresponding path program 2 times [2021-02-19 17:34:54,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:54,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619325857] [2021-02-19 17:34:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:54,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619325857] [2021-02-19 17:34:54,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:54,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:54,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260473459] [2021-02-19 17:34:54,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:54,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:54,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:54,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:54,929 INFO L87 Difference]: Start difference. First operand 1119 states and 4419 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:54,981 INFO L93 Difference]: Finished difference Result 1519 states and 5747 transitions. [2021-02-19 17:34:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:54,991 INFO L225 Difference]: With dead ends: 1519 [2021-02-19 17:34:54,991 INFO L226 Difference]: Without dead ends: 1478 [2021-02-19 17:34:54,991 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-02-19 17:34:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1174. [2021-02-19 17:34:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1173 states have (on average 3.9028132992327365) internal successors, (4578), 1173 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 4578 transitions. [2021-02-19 17:34:55,029 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 4578 transitions. Word has length 21 [2021-02-19 17:34:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:55,029 INFO L480 AbstractCegarLoop]: Abstraction has 1174 states and 4578 transitions. [2021-02-19 17:34:55,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 4578 transitions. [2021-02-19 17:34:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:34:55,032 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:55,033 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:55,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 17:34:55,033 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1863097230, now seen corresponding path program 2 times [2021-02-19 17:34:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215819071] [2021-02-19 17:34:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:55,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215819071] [2021-02-19 17:34:55,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:55,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:34:55,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805026308] [2021-02-19 17:34:55,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:34:55,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:34:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:55,108 INFO L87 Difference]: Start difference. First operand 1174 states and 4578 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:55,157 INFO L93 Difference]: Finished difference Result 1589 states and 6051 transitions. [2021-02-19 17:34:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 17:34:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:55,168 INFO L225 Difference]: With dead ends: 1589 [2021-02-19 17:34:55,168 INFO L226 Difference]: Without dead ends: 1589 [2021-02-19 17:34:55,171 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-02-19 17:34:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1285. [2021-02-19 17:34:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 3.9088785046728973) internal successors, (5019), 1284 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 5019 transitions. [2021-02-19 17:34:55,217 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 5019 transitions. Word has length 21 [2021-02-19 17:34:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:55,218 INFO L480 AbstractCegarLoop]: Abstraction has 1285 states and 5019 transitions. [2021-02-19 17:34:55,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 5019 transitions. [2021-02-19 17:34:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:34:55,224 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:55,224 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:55,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 17:34:55,224 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:55,225 INFO L82 PathProgramCache]: Analyzing trace with hash 538977746, now seen corresponding path program 1 times [2021-02-19 17:34:55,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:55,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482751221] [2021-02-19 17:34:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:55,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482751221] [2021-02-19 17:34:55,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536221366] [2021-02-19 17:34:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:34:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:55,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:55,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-02-19 17:34:55,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691866691] [2021-02-19 17:34:55,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:34:55,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:55,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:34:55,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:55,436 INFO L87 Difference]: Start difference. First operand 1285 states and 5019 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:55,519 INFO L93 Difference]: Finished difference Result 2143 states and 8130 transitions. [2021-02-19 17:34:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:34:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:55,532 INFO L225 Difference]: With dead ends: 2143 [2021-02-19 17:34:55,532 INFO L226 Difference]: Without dead ends: 2075 [2021-02-19 17:34:55,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-02-19 17:34:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1564. [2021-02-19 17:34:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.9366602687140113) internal successors, (6153), 1563 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 6153 transitions. [2021-02-19 17:34:55,600 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 6153 transitions. Word has length 23 [2021-02-19 17:34:55,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:55,601 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 6153 transitions. [2021-02-19 17:34:55,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 6153 transitions. [2021-02-19 17:34:55,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:34:55,606 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:55,606 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:55,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:55,828 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:55,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1114307022, now seen corresponding path program 2 times [2021-02-19 17:34:55,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:55,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691097840] [2021-02-19 17:34:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:34:55,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691097840] [2021-02-19 17:34:55,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:55,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:55,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075117097] [2021-02-19 17:34:55,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:55,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:55,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:55,864 INFO L87 Difference]: Start difference. First operand 1564 states and 6153 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:55,922 INFO L93 Difference]: Finished difference Result 2365 states and 9064 transitions. [2021-02-19 17:34:55,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:34:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:34:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:55,936 INFO L225 Difference]: With dead ends: 2365 [2021-02-19 17:34:55,937 INFO L226 Difference]: Without dead ends: 2297 [2021-02-19 17:34:55,937 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:55,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-02-19 17:34:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1785. [2021-02-19 17:34:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.9551569506726456) internal successors, (7056), 1784 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 7056 transitions. [2021-02-19 17:34:55,991 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 7056 transitions. Word has length 23 [2021-02-19 17:34:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:55,992 INFO L480 AbstractCegarLoop]: Abstraction has 1785 states and 7056 transitions. [2021-02-19 17:34:55,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:55,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 7056 transitions. [2021-02-19 17:34:55,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:34:55,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:55,996 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:55,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 17:34:55,997 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:55,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:55,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1868274778, now seen corresponding path program 1 times [2021-02-19 17:34:55,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:55,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20725028] [2021-02-19 17:34:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:56,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20725028] [2021-02-19 17:34:56,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430033259] [2021-02-19 17:34:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-02-19 17:34:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:34:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:56,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:56,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:56,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-02-19 17:34:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844797476] [2021-02-19 17:34:56,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:34:56,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:34:56,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:56,197 INFO L87 Difference]: Start difference. First operand 1785 states and 7056 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:56,313 INFO L93 Difference]: Finished difference Result 2448 states and 9424 transitions. [2021-02-19 17:34:56,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:34:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:34:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:56,326 INFO L225 Difference]: With dead ends: 2448 [2021-02-19 17:34:56,326 INFO L226 Difference]: Without dead ends: 2397 [2021-02-19 17:34:56,326 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:34:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2397 states. [2021-02-19 17:34:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2397 to 2051. [2021-02-19 17:34:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.951219512195122) internal successors, (8100), 2050 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 8100 transitions. [2021-02-19 17:34:56,386 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 8100 transitions. Word has length 23 [2021-02-19 17:34:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:56,387 INFO L480 AbstractCegarLoop]: Abstraction has 2051 states and 8100 transitions. [2021-02-19 17:34:56,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 8100 transitions. [2021-02-19 17:34:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 17:34:56,393 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:56,393 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:56,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:56,606 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:56,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:56,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1499166610, now seen corresponding path program 2 times [2021-02-19 17:34:56,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:56,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823957759] [2021-02-19 17:34:56,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:34:56,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823957759] [2021-02-19 17:34:56,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:34:56,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 17:34:56,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623982066] [2021-02-19 17:34:56,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 17:34:56,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:56,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 17:34:56,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:56,664 INFO L87 Difference]: Start difference. First operand 2051 states and 8100 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:56,749 INFO L93 Difference]: Finished difference Result 2710 states and 10468 transitions. [2021-02-19 17:34:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:34:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 17:34:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:56,759 INFO L225 Difference]: With dead ends: 2710 [2021-02-19 17:34:56,759 INFO L226 Difference]: Without dead ends: 2659 [2021-02-19 17:34:56,759 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 17:34:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-02-19 17:34:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 2311. [2021-02-19 17:34:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 3.9484848484848483) internal successors, (9121), 2310 states have internal predecessors, (9121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 9121 transitions. [2021-02-19 17:34:56,819 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 9121 transitions. Word has length 23 [2021-02-19 17:34:56,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:56,819 INFO L480 AbstractCegarLoop]: Abstraction has 2311 states and 9121 transitions. [2021-02-19 17:34:56,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 9121 transitions. [2021-02-19 17:34:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:34:56,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:56,825 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:56,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 17:34:56,825 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 202766292, now seen corresponding path program 3 times [2021-02-19 17:34:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:56,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811725299] [2021-02-19 17:34:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:56,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811725299] [2021-02-19 17:34:56,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230554070] [2021-02-19 17:34:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:56,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:34:56,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:34:56,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:34:56,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:56,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:56,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:34:56,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037667325] [2021-02-19 17:34:56,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:34:56,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:56,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:34:56,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:34:56,997 INFO L87 Difference]: Start difference. First operand 2311 states and 9121 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:57,456 INFO L93 Difference]: Finished difference Result 6038 states and 23046 transitions. [2021-02-19 17:34:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:34:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:34:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:57,475 INFO L225 Difference]: With dead ends: 6038 [2021-02-19 17:34:57,475 INFO L226 Difference]: Without dead ends: 6038 [2021-02-19 17:34:57,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:34:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6038 states. [2021-02-19 17:34:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6038 to 2800. [2021-02-19 17:34:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 4.00821722043587) internal successors, (11219), 2799 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 11219 transitions. [2021-02-19 17:34:57,579 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 11219 transitions. Word has length 25 [2021-02-19 17:34:57,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:57,579 INFO L480 AbstractCegarLoop]: Abstraction has 2800 states and 11219 transitions. [2021-02-19 17:34:57,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:57,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 11219 transitions. [2021-02-19 17:34:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:34:57,587 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:57,587 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:57,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 17:34:57,809 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1254515156, now seen corresponding path program 4 times [2021-02-19 17:34:57,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:57,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303018372] [2021-02-19 17:34:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:57,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303018372] [2021-02-19 17:34:57,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125568715] [2021-02-19 17:34:57,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:57,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:34:57,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:34:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:34:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:57,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:57,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:34:57,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107768708] [2021-02-19 17:34:57,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:34:57,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:34:57,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:34:57,964 INFO L87 Difference]: Start difference. First operand 2800 states and 11219 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:58,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:58,204 INFO L93 Difference]: Finished difference Result 5607 states and 21463 transitions. [2021-02-19 17:34:58,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:34:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:34:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:58,222 INFO L225 Difference]: With dead ends: 5607 [2021-02-19 17:34:58,222 INFO L226 Difference]: Without dead ends: 5495 [2021-02-19 17:34:58,222 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:34:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-02-19 17:34:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 3696. [2021-02-19 17:34:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 3695 states have (on average 4.088227334235453) internal successors, (15106), 3695 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 15106 transitions. [2021-02-19 17:34:58,373 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 15106 transitions. Word has length 25 [2021-02-19 17:34:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:58,374 INFO L480 AbstractCegarLoop]: Abstraction has 3696 states and 15106 transitions. [2021-02-19 17:34:58,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 15106 transitions. [2021-02-19 17:34:58,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:34:58,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:58,387 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:58,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:58,608 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash 204661680, now seen corresponding path program 5 times [2021-02-19 17:34:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:58,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793556407] [2021-02-19 17:34:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793556407] [2021-02-19 17:34:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712738078] [2021-02-19 17:34:58,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:58,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:34:58,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:34:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:34:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:58,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:58,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:34:58,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448706213] [2021-02-19 17:34:58,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:34:58,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:58,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:34:58,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:34:58,770 INFO L87 Difference]: Start difference. First operand 3696 states and 15106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:58,978 INFO L93 Difference]: Finished difference Result 5302 states and 20641 transitions. [2021-02-19 17:34:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:34:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:34:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:58,995 INFO L225 Difference]: With dead ends: 5302 [2021-02-19 17:34:58,996 INFO L226 Difference]: Without dead ends: 5302 [2021-02-19 17:34:58,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:34:59,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-02-19 17:34:59,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 3659. [2021-02-19 17:34:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 4.064516129032258) internal successors, (14868), 3658 states have internal predecessors, (14868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 14868 transitions. [2021-02-19 17:34:59,107 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 14868 transitions. Word has length 25 [2021-02-19 17:34:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:59,107 INFO L480 AbstractCegarLoop]: Abstraction has 3659 states and 14868 transitions. [2021-02-19 17:34:59,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 14868 transitions. [2021-02-19 17:34:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:34:59,114 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:59,114 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:34:59,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 17:34:59,315 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:34:59,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:34:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash 651272556, now seen corresponding path program 6 times [2021-02-19 17:34:59,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:34:59,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856037895] [2021-02-19 17:34:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:34:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:34:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:59,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856037895] [2021-02-19 17:34:59,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601775761] [2021-02-19 17:34:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:34:59,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:34:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:34:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:34:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:34:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:34:59,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:34:59,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:34:59,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218364981] [2021-02-19 17:34:59,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:34:59,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:34:59,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:34:59,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:34:59,474 INFO L87 Difference]: Start difference. First operand 3659 states and 14868 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:34:59,662 INFO L93 Difference]: Finished difference Result 4788 states and 18687 transitions. [2021-02-19 17:34:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:34:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:34:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:34:59,678 INFO L225 Difference]: With dead ends: 4788 [2021-02-19 17:34:59,679 INFO L226 Difference]: Without dead ends: 4768 [2021-02-19 17:34:59,679 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:34:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-02-19 17:34:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 3665. [2021-02-19 17:34:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 4.060316593886463) internal successors, (14877), 3664 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:59,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14877 transitions. [2021-02-19 17:34:59,808 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14877 transitions. Word has length 25 [2021-02-19 17:34:59,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:34:59,808 INFO L480 AbstractCegarLoop]: Abstraction has 3665 states and 14877 transitions. [2021-02-19 17:34:59,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:34:59,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14877 transitions. [2021-02-19 17:34:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:34:59,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:34:59,817 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:00,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:35:00,033 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1201614412, now seen corresponding path program 7 times [2021-02-19 17:35:00,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:00,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725043593] [2021-02-19 17:35:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:00,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725043593] [2021-02-19 17:35:00,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677149357] [2021-02-19 17:35:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:00,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:00,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:00,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386848823] [2021-02-19 17:35:00,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:00,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:00,198 INFO L87 Difference]: Start difference. First operand 3665 states and 14877 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:00,408 INFO L93 Difference]: Finished difference Result 7954 states and 31437 transitions. [2021-02-19 17:35:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:00,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:00,432 INFO L225 Difference]: With dead ends: 7954 [2021-02-19 17:35:00,433 INFO L226 Difference]: Without dead ends: 7954 [2021-02-19 17:35:00,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2021-02-19 17:35:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 4610. [2021-02-19 17:35:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 4.175092210891734) internal successors, (19243), 4609 states have internal predecessors, (19243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 19243 transitions. [2021-02-19 17:35:00,580 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 19243 transitions. Word has length 25 [2021-02-19 17:35:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:00,580 INFO L480 AbstractCegarLoop]: Abstraction has 4610 states and 19243 transitions. [2021-02-19 17:35:00,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 19243 transitions. [2021-02-19 17:35:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:00,592 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:00,592 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:00,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 17:35:00,806 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:00,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1585752628, now seen corresponding path program 8 times [2021-02-19 17:35:00,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:00,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020861917] [2021-02-19 17:35:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020861917] [2021-02-19 17:35:00,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907304385] [2021-02-19 17:35:00,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:00,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:00,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:00,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:00,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:00,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:00,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:00,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925149066] [2021-02-19 17:35:00,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:00,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:00,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:00,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:00,929 INFO L87 Difference]: Start difference. First operand 4610 states and 19243 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:01,143 INFO L93 Difference]: Finished difference Result 6087 states and 24217 transitions. [2021-02-19 17:35:01,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:01,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 25 [2021-02-19 17:35:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:01,161 INFO L225 Difference]: With dead ends: 6087 [2021-02-19 17:35:01,162 INFO L226 Difference]: Without dead ends: 6059 [2021-02-19 17:35:01,162 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6059 states. [2021-02-19 17:35:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6059 to 4587. [2021-02-19 17:35:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4586 states have (on average 4.174662014827737) internal successors, (19145), 4586 states have internal predecessors, (19145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 19145 transitions. [2021-02-19 17:35:01,331 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 19145 transitions. Word has length 25 [2021-02-19 17:35:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:01,331 INFO L480 AbstractCegarLoop]: Abstraction has 4587 states and 19145 transitions. [2021-02-19 17:35:01,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 19145 transitions. [2021-02-19 17:35:01,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:01,342 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:01,342 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:01,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:35:01,558 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash 526800048, now seen corresponding path program 9 times [2021-02-19 17:35:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:01,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134017652] [2021-02-19 17:35:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:01,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134017652] [2021-02-19 17:35:01,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23006058] [2021-02-19 17:35:01,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:01,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:01,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:01,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:01,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:01,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706358984] [2021-02-19 17:35:01,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:01,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:01,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:01,691 INFO L87 Difference]: Start difference. First operand 4587 states and 19145 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:01,954 INFO L93 Difference]: Finished difference Result 6950 states and 27646 transitions. [2021-02-19 17:35:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:01,975 INFO L225 Difference]: With dead ends: 6950 [2021-02-19 17:35:01,975 INFO L226 Difference]: Without dead ends: 6950 [2021-02-19 17:35:01,975 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6950 states. [2021-02-19 17:35:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6950 to 4669. [2021-02-19 17:35:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.1782347900599826) internal successors, (19504), 4668 states have internal predecessors, (19504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19504 transitions. [2021-02-19 17:35:02,106 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19504 transitions. Word has length 25 [2021-02-19 17:35:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:02,106 INFO L480 AbstractCegarLoop]: Abstraction has 4669 states and 19504 transitions. [2021-02-19 17:35:02,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19504 transitions. [2021-02-19 17:35:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:02,119 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:02,119 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:02,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:02,334 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:02,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:02,334 INFO L82 PathProgramCache]: Analyzing trace with hash 973410924, now seen corresponding path program 10 times [2021-02-19 17:35:02,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:02,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497404665] [2021-02-19 17:35:02,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:02,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497404665] [2021-02-19 17:35:02,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23787756] [2021-02-19 17:35:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:02,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:02,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:02,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:02,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:02,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:02,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743306581] [2021-02-19 17:35:02,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:02,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:02,452 INFO L87 Difference]: Start difference. First operand 4669 states and 19504 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:02,656 INFO L93 Difference]: Finished difference Result 7627 states and 29903 transitions. [2021-02-19 17:35:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:35:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:02,675 INFO L225 Difference]: With dead ends: 7627 [2021-02-19 17:35:02,676 INFO L226 Difference]: Without dead ends: 7607 [2021-02-19 17:35:02,676 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-02-19 17:35:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 4687. [2021-02-19 17:35:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 4.173068715322237) internal successors, (19555), 4686 states have internal predecessors, (19555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 19555 transitions. [2021-02-19 17:35:02,852 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 19555 transitions. Word has length 25 [2021-02-19 17:35:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:02,853 INFO L480 AbstractCegarLoop]: Abstraction has 4687 states and 19555 transitions. [2021-02-19 17:35:02,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 19555 transitions. [2021-02-19 17:35:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:02,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:02,864 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:03,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:03,078 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash 258053620, now seen corresponding path program 11 times [2021-02-19 17:35:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:03,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997716863] [2021-02-19 17:35:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:03,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997716863] [2021-02-19 17:35:03,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447775821] [2021-02-19 17:35:03,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:03,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:03,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:03,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:03,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:03,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:03,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083895082] [2021-02-19 17:35:03,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:03,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:03,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:03,229 INFO L87 Difference]: Start difference. First operand 4687 states and 19555 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:03,595 INFO L93 Difference]: Finished difference Result 7378 states and 29710 transitions. [2021-02-19 17:35:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:35:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:03,611 INFO L225 Difference]: With dead ends: 7378 [2021-02-19 17:35:03,611 INFO L226 Difference]: Without dead ends: 7378 [2021-02-19 17:35:03,611 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:35:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-02-19 17:35:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 5057. [2021-02-19 17:35:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 4.166139240506329) internal successors, (21064), 5056 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 21064 transitions. [2021-02-19 17:35:03,735 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 21064 transitions. Word has length 25 [2021-02-19 17:35:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:03,735 INFO L480 AbstractCegarLoop]: Abstraction has 5057 states and 21064 transitions. [2021-02-19 17:35:03,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 21064 transitions. [2021-02-19 17:35:03,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:03,748 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:03,748 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:03,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:35:03,962 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:03,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:03,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1577192366, now seen corresponding path program 12 times [2021-02-19 17:35:03,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:03,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052953324] [2021-02-19 17:35:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:04,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052953324] [2021-02-19 17:35:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434012627] [2021-02-19 17:35:04,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:04,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:35:04,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:04,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:04,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:04,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 17:35:04,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503389423] [2021-02-19 17:35:04,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:04,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:04,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:04,116 INFO L87 Difference]: Start difference. First operand 5057 states and 21064 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:04,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:04,319 INFO L93 Difference]: Finished difference Result 7943 states and 31115 transitions. [2021-02-19 17:35:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:04,319 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:04,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:04,334 INFO L225 Difference]: With dead ends: 7943 [2021-02-19 17:35:04,334 INFO L226 Difference]: Without dead ends: 7883 [2021-02-19 17:35:04,335 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:35:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-02-19 17:35:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 5255. [2021-02-19 17:35:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 5254 states have (on average 4.142558051008756) internal successors, (21765), 5254 states have internal predecessors, (21765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 21765 transitions. [2021-02-19 17:35:04,530 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 21765 transitions. Word has length 25 [2021-02-19 17:35:04,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:04,530 INFO L480 AbstractCegarLoop]: Abstraction has 5255 states and 21765 transitions. [2021-02-19 17:35:04,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 21765 transitions. [2021-02-19 17:35:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:04,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:04,539 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:04,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:04,739 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:04,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1628733276, now seen corresponding path program 3 times [2021-02-19 17:35:04,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:04,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272786481] [2021-02-19 17:35:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272786481] [2021-02-19 17:35:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778596644] [2021-02-19 17:35:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:04,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:04,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:04,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:04,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:04,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:04,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206591591] [2021-02-19 17:35:04,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:04,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:04,874 INFO L87 Difference]: Start difference. First operand 5255 states and 21765 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:05,257 INFO L93 Difference]: Finished difference Result 15644 states and 64448 transitions. [2021-02-19 17:35:05,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:35:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 25 [2021-02-19 17:35:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:05,295 INFO L225 Difference]: With dead ends: 15644 [2021-02-19 17:35:05,295 INFO L226 Difference]: Without dead ends: 15644 [2021-02-19 17:35:05,296 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:35:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2021-02-19 17:35:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 7401. [2021-02-19 17:35:05,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7401 states, 7400 states have (on average 4.2628378378378375) internal successors, (31545), 7400 states have internal predecessors, (31545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7401 states to 7401 states and 31545 transitions. [2021-02-19 17:35:05,634 INFO L78 Accepts]: Start accepts. Automaton has 7401 states and 31545 transitions. Word has length 25 [2021-02-19 17:35:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:05,634 INFO L480 AbstractCegarLoop]: Abstraction has 7401 states and 31545 transitions. [2021-02-19 17:35:05,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 7401 states and 31545 transitions. [2021-02-19 17:35:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:05,654 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:05,654 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:05,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 17:35:05,855 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash -281129252, now seen corresponding path program 4 times [2021-02-19 17:35:05,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:05,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800633502] [2021-02-19 17:35:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800633502] [2021-02-19 17:35:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048420386] [2021-02-19 17:35:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:05,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:05,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:05,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:06,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:06,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:06,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829285060] [2021-02-19 17:35:06,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:06,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:06,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:06,051 INFO L87 Difference]: Start difference. First operand 7401 states and 31545 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:06,287 INFO L93 Difference]: Finished difference Result 14414 states and 59525 transitions. [2021-02-19 17:35:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 25 [2021-02-19 17:35:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:06,321 INFO L225 Difference]: With dead ends: 14414 [2021-02-19 17:35:06,321 INFO L226 Difference]: Without dead ends: 14318 [2021-02-19 17:35:06,321 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14318 states. [2021-02-19 17:35:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14318 to 9947. [2021-02-19 17:35:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 4.3626583551176354) internal successors, (43391), 9946 states have internal predecessors, (43391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 43391 transitions. [2021-02-19 17:35:06,594 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 43391 transitions. Word has length 25 [2021-02-19 17:35:06,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:06,594 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 43391 transitions. [2021-02-19 17:35:06,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 43391 transitions. [2021-02-19 17:35:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:06,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:06,611 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:06,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:06,812 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:06,812 INFO L82 PathProgramCache]: Analyzing trace with hash 800841436, now seen corresponding path program 5 times [2021-02-19 17:35:06,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:06,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745335942] [2021-02-19 17:35:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745335942] [2021-02-19 17:35:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670080836] [2021-02-19 17:35:06,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:06,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:06,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:06,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:06,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:06,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:06,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485881800] [2021-02-19 17:35:06,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:06,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:06,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:06,930 INFO L87 Difference]: Start difference. First operand 9947 states and 43391 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:07,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:07,148 INFO L93 Difference]: Finished difference Result 14334 states and 59778 transitions. [2021-02-19 17:35:07,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:35:07,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 25 [2021-02-19 17:35:07,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:07,180 INFO L225 Difference]: With dead ends: 14334 [2021-02-19 17:35:07,180 INFO L226 Difference]: Without dead ends: 14334 [2021-02-19 17:35:07,181 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:07,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-02-19 17:35:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9809. [2021-02-19 17:35:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9809 states, 9808 states have (on average 4.337173735725938) internal successors, (42539), 9808 states have internal predecessors, (42539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9809 states to 9809 states and 42539 transitions. [2021-02-19 17:35:07,528 INFO L78 Accepts]: Start accepts. Automaton has 9809 states and 42539 transitions. Word has length 25 [2021-02-19 17:35:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:07,528 INFO L480 AbstractCegarLoop]: Abstraction has 9809 states and 42539 transitions. [2021-02-19 17:35:07,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 9809 states and 42539 transitions. [2021-02-19 17:35:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:07,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:07,545 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:07,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 17:35:07,746 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:07,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1790308116, now seen corresponding path program 6 times [2021-02-19 17:35:07,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:07,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210538019] [2021-02-19 17:35:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:07,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210538019] [2021-02-19 17:35:07,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39273324] [2021-02-19 17:35:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:07,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:07,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:07,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:07,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:07,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274143] [2021-02-19 17:35:07,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:07,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:07,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:07,963 INFO L87 Difference]: Start difference. First operand 9809 states and 42539 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:08,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:08,149 INFO L93 Difference]: Finished difference Result 12691 states and 52781 transitions. [2021-02-19 17:35:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:08,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:08,176 INFO L225 Difference]: With dead ends: 12691 [2021-02-19 17:35:08,176 INFO L226 Difference]: Without dead ends: 12666 [2021-02-19 17:35:08,177 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:08,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12666 states. [2021-02-19 17:35:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12666 to 9875. [2021-02-19 17:35:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.332388089933158) internal successors, (42778), 9874 states have internal predecessors, (42778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42778 transitions. [2021-02-19 17:35:08,419 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42778 transitions. Word has length 25 [2021-02-19 17:35:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:08,419 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42778 transitions. [2021-02-19 17:35:08,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42778 transitions. [2021-02-19 17:35:08,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:08,436 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:08,436 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:08,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:35:08,636 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1726170260, now seen corresponding path program 7 times [2021-02-19 17:35:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:08,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719278007] [2021-02-19 17:35:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:08,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719278007] [2021-02-19 17:35:08,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471259178] [2021-02-19 17:35:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:08,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:08,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:08,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:08,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:08,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576938749] [2021-02-19 17:35:08,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:08,775 INFO L87 Difference]: Start difference. First operand 9875 states and 42778 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:09,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:09,055 INFO L93 Difference]: Finished difference Result 16572 states and 68392 transitions. [2021-02-19 17:35:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:09,055 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:09,092 INFO L225 Difference]: With dead ends: 16572 [2021-02-19 17:35:09,092 INFO L226 Difference]: Without dead ends: 16572 [2021-02-19 17:35:09,092 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16572 states. [2021-02-19 17:35:09,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16572 to 9875. [2021-02-19 17:35:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.3184119910877055) internal successors, (42640), 9874 states have internal predecessors, (42640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 42640 transitions. [2021-02-19 17:35:09,431 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 42640 transitions. Word has length 25 [2021-02-19 17:35:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:09,431 INFO L480 AbstractCegarLoop]: Abstraction has 9875 states and 42640 transitions. [2021-02-19 17:35:09,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 42640 transitions. [2021-02-19 17:35:09,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:09,453 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:09,453 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:09,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 17:35:09,659 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:09,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:09,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1488206868, now seen corresponding path program 8 times [2021-02-19 17:35:09,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:09,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140540219] [2021-02-19 17:35:09,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:09,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140540219] [2021-02-19 17:35:09,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406945260] [2021-02-19 17:35:09,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:09,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:09,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:09,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:09,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:09,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802718118] [2021-02-19 17:35:09,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:09,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:09,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:09,757 INFO L87 Difference]: Start difference. First operand 9875 states and 42640 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:10,042 INFO L93 Difference]: Finished difference Result 13953 states and 57309 transitions. [2021-02-19 17:35:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 25 [2021-02-19 17:35:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:10,074 INFO L225 Difference]: With dead ends: 13953 [2021-02-19 17:35:10,074 INFO L226 Difference]: Without dead ends: 13929 [2021-02-19 17:35:10,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13929 states. [2021-02-19 17:35:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13929 to 9623. [2021-02-19 17:35:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9623 states, 9622 states have (on average 4.305757638744543) internal successors, (41430), 9622 states have internal predecessors, (41430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9623 states to 9623 states and 41430 transitions. [2021-02-19 17:35:10,374 INFO L78 Accepts]: Start accepts. Automaton has 9623 states and 41430 transitions. Word has length 25 [2021-02-19 17:35:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:10,374 INFO L480 AbstractCegarLoop]: Abstraction has 9623 states and 41430 transitions. [2021-02-19 17:35:10,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9623 states and 41430 transitions. [2021-02-19 17:35:10,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:10,426 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:10,426 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:10,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:35:10,626 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -192289772, now seen corresponding path program 9 times [2021-02-19 17:35:10,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:10,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571630754] [2021-02-19 17:35:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571630754] [2021-02-19 17:35:10,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686486371] [2021-02-19 17:35:10,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:10,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:10,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:10,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:10,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:10,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:10,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:10,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023980733] [2021-02-19 17:35:10,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:10,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:10,741 INFO L87 Difference]: Start difference. First operand 9623 states and 41430 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:11,147 INFO L93 Difference]: Finished difference Result 16966 states and 70031 transitions. [2021-02-19 17:35:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:35:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 25 [2021-02-19 17:35:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:11,205 INFO L225 Difference]: With dead ends: 16966 [2021-02-19 17:35:11,206 INFO L226 Difference]: Without dead ends: 16966 [2021-02-19 17:35:11,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:35:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-02-19 17:35:11,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 9761. [2021-02-19 17:35:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.303893442622951) internal successors, (42006), 9760 states have internal predecessors, (42006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 42006 transitions. [2021-02-19 17:35:11,541 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 42006 transitions. Word has length 25 [2021-02-19 17:35:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:11,542 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 42006 transitions. [2021-02-19 17:35:11,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2021-02-19 17:35:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 42006 transitions. [2021-02-19 17:35:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:11,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:11,561 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:11,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:35:11,762 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:11,762 INFO L82 PathProgramCache]: Analyzing trace with hash 797176908, now seen corresponding path program 10 times [2021-02-19 17:35:11,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:11,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199374243] [2021-02-19 17:35:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199374243] [2021-02-19 17:35:11,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359227664] [2021-02-19 17:35:11,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:11,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:11,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:11,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-02-19 17:35:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145191823] [2021-02-19 17:35:11,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:11,906 INFO L87 Difference]: Start difference. First operand 9761 states and 42006 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:12,158 INFO L93 Difference]: Finished difference Result 15336 states and 62550 transitions. [2021-02-19 17:35:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:35:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 17:35:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:12,204 INFO L225 Difference]: With dead ends: 15336 [2021-02-19 17:35:12,204 INFO L226 Difference]: Without dead ends: 15311 [2021-02-19 17:35:12,205 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:35:12,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2021-02-19 17:35:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 9761. [2021-02-19 17:35:12,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 4.30266393442623) internal successors, (41994), 9760 states have internal predecessors, (41994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 41994 transitions. [2021-02-19 17:35:12,511 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 41994 transitions. Word has length 25 [2021-02-19 17:35:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:12,511 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 41994 transitions. [2021-02-19 17:35:12,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 41994 transitions. [2021-02-19 17:35:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:12,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:12,527 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:12,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:12,728 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1066544432, now seen corresponding path program 11 times [2021-02-19 17:35:12,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:12,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337633988] [2021-02-19 17:35:12,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:12,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337633988] [2021-02-19 17:35:12,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61168612] [2021-02-19 17:35:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:12,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:12,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:12,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:12,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:12,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:12,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:12,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597158574] [2021-02-19 17:35:12,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:12,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:12,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:12,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:12,829 INFO L87 Difference]: Start difference. First operand 9761 states and 41994 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:13,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:13,271 INFO L93 Difference]: Finished difference Result 16139 states and 67397 transitions. [2021-02-19 17:35:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:35:13,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 25 [2021-02-19 17:35:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:13,324 INFO L225 Difference]: With dead ends: 16139 [2021-02-19 17:35:13,324 INFO L226 Difference]: Without dead ends: 16139 [2021-02-19 17:35:13,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:35:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16139 states. [2021-02-19 17:35:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16139 to 10624. [2021-02-19 17:35:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10624 states, 10623 states have (on average 4.260284288807305) internal successors, (45257), 10623 states have internal predecessors, (45257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:13,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10624 states to 10624 states and 45257 transitions. [2021-02-19 17:35:13,560 INFO L78 Accepts]: Start accepts. Automaton has 10624 states and 45257 transitions. Word has length 25 [2021-02-19 17:35:13,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:13,560 INFO L480 AbstractCegarLoop]: Abstraction has 10624 states and 45257 transitions. [2021-02-19 17:35:13,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:13,560 INFO L276 IsEmpty]: Start isEmpty. Operand 10624 states and 45257 transitions. [2021-02-19 17:35:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 17:35:13,578 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:13,578 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:13,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 17:35:13,782 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:13,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash -200280194, now seen corresponding path program 12 times [2021-02-19 17:35:13,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:13,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437233036] [2021-02-19 17:35:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:13,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437233036] [2021-02-19 17:35:13,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504715884] [2021-02-19 17:35:13,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:13,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:35:13,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 17:35:13,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:13,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:13,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-02-19 17:35:13,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739165084] [2021-02-19 17:35:13,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:13,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:13,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:13,882 INFO L87 Difference]: Start difference. First operand 10624 states and 45257 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:14,170 INFO L93 Difference]: Finished difference Result 15510 states and 62671 transitions. [2021-02-19 17:35:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:35:14,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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 25 [2021-02-19 17:35:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:14,204 INFO L225 Difference]: With dead ends: 15510 [2021-02-19 17:35:14,204 INFO L226 Difference]: Without dead ends: 15419 [2021-02-19 17:35:14,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:35:14,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15419 states. [2021-02-19 17:35:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15419 to 11124. [2021-02-19 17:35:14,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11124 states, 11123 states have (on average 4.2321316191674905) internal successors, (47074), 11123 states have internal predecessors, (47074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11124 states to 11124 states and 47074 transitions. [2021-02-19 17:35:14,421 INFO L78 Accepts]: Start accepts. Automaton has 11124 states and 47074 transitions. Word has length 25 [2021-02-19 17:35:14,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:14,421 INFO L480 AbstractCegarLoop]: Abstraction has 11124 states and 47074 transitions. [2021-02-19 17:35:14,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 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) [2021-02-19 17:35:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 11124 states and 47074 transitions. [2021-02-19 17:35:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:14,439 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:14,440 INFO L506 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] [2021-02-19 17:35:14,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:14,649 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:14,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:14,649 INFO L82 PathProgramCache]: Analyzing trace with hash 277855062, now seen corresponding path program 13 times [2021-02-19 17:35:14,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:14,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114140065] [2021-02-19 17:35:14,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:14,798 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-02-19 17:35:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:14,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114140065] [2021-02-19 17:35:14,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373680470] [2021-02-19 17:35:14,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:14,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:15,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817465487] [2021-02-19 17:35:15,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:15,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:15,017 INFO L87 Difference]: Start difference. First operand 11124 states and 47074 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:15,255 INFO L93 Difference]: Finished difference Result 12725 states and 52883 transitions. [2021-02-19 17:35:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:15,284 INFO L225 Difference]: With dead ends: 12725 [2021-02-19 17:35:15,284 INFO L226 Difference]: Without dead ends: 12657 [2021-02-19 17:35:15,285 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-02-19 17:35:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 11743. [2021-02-19 17:35:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 4.222619655935956) internal successors, (49582), 11742 states have internal predecessors, (49582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 49582 transitions. [2021-02-19 17:35:15,602 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 49582 transitions. Word has length 27 [2021-02-19 17:35:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:15,602 INFO L480 AbstractCegarLoop]: Abstraction has 11743 states and 49582 transitions. [2021-02-19 17:35:15,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 49582 transitions. [2021-02-19 17:35:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:15,627 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:15,627 INFO L506 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] [2021-02-19 17:35:15,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 17:35:15,837 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:15,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:15,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2098444658, now seen corresponding path program 14 times [2021-02-19 17:35:15,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:15,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81524214] [2021-02-19 17:35:15,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81524214] [2021-02-19 17:35:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966811903] [2021-02-19 17:35:15,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:15,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:16,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:16,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:35:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31064944] [2021-02-19 17:35:16,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:16,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:16,056 INFO L87 Difference]: Start difference. First operand 11743 states and 49582 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-02-19 17:35:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:16,394 INFO L93 Difference]: Finished difference Result 13435 states and 55712 transitions. [2021-02-19 17:35:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:16,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27 [2021-02-19 17:35:16,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:16,434 INFO L225 Difference]: With dead ends: 13435 [2021-02-19 17:35:16,434 INFO L226 Difference]: Without dead ends: 13299 [2021-02-19 17:35:16,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2021-02-19 17:35:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 11989. [2021-02-19 17:35:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11989 states, 11988 states have (on average 4.226976976976977) internal successors, (50673), 11988 states have internal predecessors, (50673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11989 states to 11989 states and 50673 transitions. [2021-02-19 17:35:16,865 INFO L78 Accepts]: Start accepts. Automaton has 11989 states and 50673 transitions. Word has length 27 [2021-02-19 17:35:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:16,865 INFO L480 AbstractCegarLoop]: Abstraction has 11989 states and 50673 transitions. [2021-02-19 17:35:16,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-02-19 17:35:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11989 states and 50673 transitions. [2021-02-19 17:35:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:16,886 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:16,886 INFO L506 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] [2021-02-19 17:35:17,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 17:35:17,086 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:17,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1839631470, now seen corresponding path program 1 times [2021-02-19 17:35:17,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:17,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909921439] [2021-02-19 17:35:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909921439] [2021-02-19 17:35:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12108261] [2021-02-19 17:35:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:17,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:17,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:17,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:35:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743041569] [2021-02-19 17:35:17,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:17,347 INFO L87 Difference]: Start difference. First operand 11989 states and 50673 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:17,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:17,644 INFO L93 Difference]: Finished difference Result 12852 states and 53545 transitions. [2021-02-19 17:35:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:17,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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 27 [2021-02-19 17:35:17,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:17,674 INFO L225 Difference]: With dead ends: 12852 [2021-02-19 17:35:17,674 INFO L226 Difference]: Without dead ends: 12484 [2021-02-19 17:35:17,674 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-02-19 17:35:17,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12212. [2021-02-19 17:35:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12212 states, 12211 states have (on average 4.207108344934895) internal successors, (51373), 12211 states have internal predecessors, (51373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12212 states to 12212 states and 51373 transitions. [2021-02-19 17:35:17,982 INFO L78 Accepts]: Start accepts. Automaton has 12212 states and 51373 transitions. Word has length 27 [2021-02-19 17:35:17,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:17,982 INFO L480 AbstractCegarLoop]: Abstraction has 12212 states and 51373 transitions. [2021-02-19 17:35:17,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 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) [2021-02-19 17:35:17,982 INFO L276 IsEmpty]: Start isEmpty. Operand 12212 states and 51373 transitions. [2021-02-19 17:35:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:18,000 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:18,001 INFO L506 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] [2021-02-19 17:35:18,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 17:35:18,202 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1753575774, now seen corresponding path program 2 times [2021-02-19 17:35:18,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:18,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183072319] [2021-02-19 17:35:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:18,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183072319] [2021-02-19 17:35:18,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100491640] [2021-02-19 17:35:18,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:18,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:18,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:18,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:18,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:35:18,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966127383] [2021-02-19 17:35:18,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:18,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:18,432 INFO L87 Difference]: Start difference. First operand 12212 states and 51373 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-02-19 17:35:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:18,719 INFO L93 Difference]: Finished difference Result 12962 states and 53969 transitions. [2021-02-19 17:35:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:18,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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 27 [2021-02-19 17:35:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:18,748 INFO L225 Difference]: With dead ends: 12962 [2021-02-19 17:35:18,748 INFO L226 Difference]: Without dead ends: 12648 [2021-02-19 17:35:18,749 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2021-02-19 17:35:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12240. [2021-02-19 17:35:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12240 states, 12239 states have (on average 4.2166026636163085) internal successors, (51607), 12239 states have internal predecessors, (51607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12240 states to 12240 states and 51607 transitions. [2021-02-19 17:35:19,057 INFO L78 Accepts]: Start accepts. Automaton has 12240 states and 51607 transitions. Word has length 27 [2021-02-19 17:35:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:19,057 INFO L480 AbstractCegarLoop]: Abstraction has 12240 states and 51607 transitions. [2021-02-19 17:35:19,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 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) [2021-02-19 17:35:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 12240 states and 51607 transitions. [2021-02-19 17:35:19,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:19,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:19,078 INFO L506 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] [2021-02-19 17:35:19,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 17:35:19,278 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash -42629102, now seen corresponding path program 3 times [2021-02-19 17:35:19,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:19,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714474923] [2021-02-19 17:35:19,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:19,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714474923] [2021-02-19 17:35:19,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719735611] [2021-02-19 17:35:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:19,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:19,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:19,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:19,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:19,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058490755] [2021-02-19 17:35:19,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:19,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:19,469 INFO L87 Difference]: Start difference. First operand 12240 states and 51607 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:19,694 INFO L93 Difference]: Finished difference Result 12764 states and 53549 transitions. [2021-02-19 17:35:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:19,723 INFO L225 Difference]: With dead ends: 12764 [2021-02-19 17:35:19,723 INFO L226 Difference]: Without dead ends: 12616 [2021-02-19 17:35:19,723 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12616 states. [2021-02-19 17:35:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12616 to 12484. [2021-02-19 17:35:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12484 states, 12483 states have (on average 4.215893615316831) internal successors, (52627), 12483 states have internal predecessors, (52627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12484 states to 12484 states and 52627 transitions. [2021-02-19 17:35:20,054 INFO L78 Accepts]: Start accepts. Automaton has 12484 states and 52627 transitions. Word has length 27 [2021-02-19 17:35:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:20,054 INFO L480 AbstractCegarLoop]: Abstraction has 12484 states and 52627 transitions. [2021-02-19 17:35:20,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12484 states and 52627 transitions. [2021-02-19 17:35:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:20,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:20,078 INFO L506 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] [2021-02-19 17:35:20,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:35:20,278 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:20,279 INFO L82 PathProgramCache]: Analyzing trace with hash 162611110, now seen corresponding path program 4 times [2021-02-19 17:35:20,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:20,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14008632] [2021-02-19 17:35:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14008632] [2021-02-19 17:35:20,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436020859] [2021-02-19 17:35:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:20,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:20,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:20,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:20,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:35:20,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930275097] [2021-02-19 17:35:20,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:20,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:20,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:20,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:20,483 INFO L87 Difference]: Start difference. First operand 12484 states and 52627 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:20,765 INFO L93 Difference]: Finished difference Result 13344 states and 55451 transitions. [2021-02-19 17:35:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:35:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:20,794 INFO L225 Difference]: With dead ends: 13344 [2021-02-19 17:35:20,794 INFO L226 Difference]: Without dead ends: 12916 [2021-02-19 17:35:20,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:20,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2021-02-19 17:35:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 12072. [2021-02-19 17:35:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12072 states, 12071 states have (on average 4.212327064866209) internal successors, (50847), 12071 states have internal predecessors, (50847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:21,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12072 states to 12072 states and 50847 transitions. [2021-02-19 17:35:21,131 INFO L78 Accepts]: Start accepts. Automaton has 12072 states and 50847 transitions. Word has length 27 [2021-02-19 17:35:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:21,131 INFO L480 AbstractCegarLoop]: Abstraction has 12072 states and 50847 transitions. [2021-02-19 17:35:21,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 12072 states and 50847 transitions. [2021-02-19 17:35:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:21,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:21,151 INFO L506 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] [2021-02-19 17:35:21,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:21,352 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash 411567542, now seen corresponding path program 5 times [2021-02-19 17:35:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:21,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649847279] [2021-02-19 17:35:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:21,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649847279] [2021-02-19 17:35:21,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380670805] [2021-02-19 17:35:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:21,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:21,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:21,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:21,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:21,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637036265] [2021-02-19 17:35:21,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:21,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:21,542 INFO L87 Difference]: Start difference. First operand 12072 states and 50847 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:21,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:21,775 INFO L93 Difference]: Finished difference Result 12692 states and 53003 transitions. [2021-02-19 17:35:21,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:21,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:21,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:21,815 INFO L225 Difference]: With dead ends: 12692 [2021-02-19 17:35:21,815 INFO L226 Difference]: Without dead ends: 12544 [2021-02-19 17:35:21,815 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12544 states. [2021-02-19 17:35:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12544 to 12224. [2021-02-19 17:35:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 12223 states have (on average 4.211813793667676) internal successors, (51481), 12223 states have internal predecessors, (51481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 51481 transitions. [2021-02-19 17:35:22,331 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 51481 transitions. Word has length 27 [2021-02-19 17:35:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:22,332 INFO L480 AbstractCegarLoop]: Abstraction has 12224 states and 51481 transitions. [2021-02-19 17:35:22,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 51481 transitions. [2021-02-19 17:35:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:22,371 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:22,371 INFO L506 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] [2021-02-19 17:35:22,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:35:22,593 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1678001426, now seen corresponding path program 6 times [2021-02-19 17:35:22,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:22,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762698174] [2021-02-19 17:35:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:22,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762698174] [2021-02-19 17:35:22,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579987768] [2021-02-19 17:35:22,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:22,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:22,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:22,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:22,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:35:22,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039546911] [2021-02-19 17:35:22,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:22,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:22,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:22,788 INFO L87 Difference]: Start difference. First operand 12224 states and 51481 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:23,124 INFO L93 Difference]: Finished difference Result 13227 states and 54835 transitions. [2021-02-19 17:35:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:23,154 INFO L225 Difference]: With dead ends: 13227 [2021-02-19 17:35:23,154 INFO L226 Difference]: Without dead ends: 12883 [2021-02-19 17:35:23,154 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12883 states. [2021-02-19 17:35:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12883 to 12275. [2021-02-19 17:35:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12275 states, 12274 states have (on average 4.194150236271794) internal successors, (51479), 12274 states have internal predecessors, (51479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12275 states to 12275 states and 51479 transitions. [2021-02-19 17:35:23,372 INFO L78 Accepts]: Start accepts. Automaton has 12275 states and 51479 transitions. Word has length 27 [2021-02-19 17:35:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:23,372 INFO L480 AbstractCegarLoop]: Abstraction has 12275 states and 51479 transitions. [2021-02-19 17:35:23,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 12275 states and 51479 transitions. [2021-02-19 17:35:23,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:23,393 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:23,393 INFO L506 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] [2021-02-19 17:35:23,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 17:35:23,593 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 264444530, now seen corresponding path program 7 times [2021-02-19 17:35:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:23,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37419916] [2021-02-19 17:35:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:23,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 17:35:23,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37419916] [2021-02-19 17:35:23,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:35:23,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 17:35:23,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998500026] [2021-02-19 17:35:23,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 17:35:23,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:23,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 17:35:23,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:23,640 INFO L87 Difference]: Start difference. First operand 12275 states and 51479 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:35:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:23,924 INFO L93 Difference]: Finished difference Result 12977 states and 53915 transitions. [2021-02-19 17:35:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:35:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 [2021-02-19 17:35:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:23,953 INFO L225 Difference]: With dead ends: 12977 [2021-02-19 17:35:23,953 INFO L226 Difference]: Without dead ends: 12779 [2021-02-19 17:35:23,953 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 17:35:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12779 states. [2021-02-19 17:35:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12779 to 12283. [2021-02-19 17:35:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12283 states, 12282 states have (on average 4.204934049829018) internal successors, (51645), 12282 states have internal predecessors, (51645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12283 states to 12283 states and 51645 transitions. [2021-02-19 17:35:24,157 INFO L78 Accepts]: Start accepts. Automaton has 12283 states and 51645 transitions. Word has length 27 [2021-02-19 17:35:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:24,157 INFO L480 AbstractCegarLoop]: Abstraction has 12283 states and 51645 transitions. [2021-02-19 17:35:24,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2021-02-19 17:35:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 12283 states and 51645 transitions. [2021-02-19 17:35:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:24,178 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:24,178 INFO L506 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] [2021-02-19 17:35:24,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-02-19 17:35:24,178 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash 89086370, now seen corresponding path program 8 times [2021-02-19 17:35:24,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:24,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324268817] [2021-02-19 17:35:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:24,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324268817] [2021-02-19 17:35:24,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35677765] [2021-02-19 17:35:24,227 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:24,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:24,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:24,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:24,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:24,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294176598] [2021-02-19 17:35:24,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:24,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:24,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:24,348 INFO L87 Difference]: Start difference. First operand 12283 states and 51645 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:24,555 INFO L93 Difference]: Finished difference Result 12839 states and 53665 transitions. [2021-02-19 17:35:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:24,584 INFO L225 Difference]: With dead ends: 12839 [2021-02-19 17:35:24,584 INFO L226 Difference]: Without dead ends: 12707 [2021-02-19 17:35:24,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-02-19 17:35:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 12503. [2021-02-19 17:35:24,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12503 states, 12502 states have (on average 4.2051671732522795) internal successors, (52573), 12502 states have internal predecessors, (52573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12503 states to 12503 states and 52573 transitions. [2021-02-19 17:35:24,895 INFO L78 Accepts]: Start accepts. Automaton has 12503 states and 52573 transitions. Word has length 27 [2021-02-19 17:35:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:24,895 INFO L480 AbstractCegarLoop]: Abstraction has 12503 states and 52573 transitions. [2021-02-19 17:35:24,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 12503 states and 52573 transitions. [2021-02-19 17:35:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:24,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:24,917 INFO L506 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] [2021-02-19 17:35:25,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:25,126 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:25,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -576277058, now seen corresponding path program 9 times [2021-02-19 17:35:25,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:25,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018927825] [2021-02-19 17:35:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018927825] [2021-02-19 17:35:25,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5180667] [2021-02-19 17:35:25,175 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:25,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:25,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:25,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-02-19 17:35:25,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244217774] [2021-02-19 17:35:25,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:25,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:25,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:25,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:25,310 INFO L87 Difference]: Start difference. First operand 12503 states and 52573 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:25,619 INFO L93 Difference]: Finished difference Result 13523 states and 55911 transitions. [2021-02-19 17:35:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:25,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:35:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:25,648 INFO L225 Difference]: With dead ends: 13523 [2021-02-19 17:35:25,649 INFO L226 Difference]: Without dead ends: 13127 [2021-02-19 17:35:25,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13127 states. [2021-02-19 17:35:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13127 to 12123. [2021-02-19 17:35:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12122 states have (on average 4.2003794753341035) internal successors, (50917), 12122 states have internal predecessors, (50917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 50917 transitions. [2021-02-19 17:35:26,027 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 50917 transitions. Word has length 27 [2021-02-19 17:35:26,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:26,027 INFO L480 AbstractCegarLoop]: Abstraction has 12123 states and 50917 transitions. [2021-02-19 17:35:26,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 50917 transitions. [2021-02-19 17:35:26,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:26,047 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:26,048 INFO L506 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] [2021-02-19 17:35:26,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 17:35:26,248 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:26,249 INFO L82 PathProgramCache]: Analyzing trace with hash 438744050, now seen corresponding path program 15 times [2021-02-19 17:35:26,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:26,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342984011] [2021-02-19 17:35:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:26,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342984011] [2021-02-19 17:35:26,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930182582] [2021-02-19 17:35:26,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:26,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:26,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:26,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:26,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:26,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:26,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657484019] [2021-02-19 17:35:26,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:26,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:26,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:26,445 INFO L87 Difference]: Start difference. First operand 12123 states and 50917 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:26,682 INFO L93 Difference]: Finished difference Result 13671 states and 56537 transitions. [2021-02-19 17:35:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:26,714 INFO L225 Difference]: With dead ends: 13671 [2021-02-19 17:35:26,714 INFO L226 Difference]: Without dead ends: 13603 [2021-02-19 17:35:26,714 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:26,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2021-02-19 17:35:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 12633. [2021-02-19 17:35:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12633 states, 12632 states have (on average 4.193635212159594) internal successors, (52974), 12632 states have internal predecessors, (52974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12633 states to 12633 states and 52974 transitions. [2021-02-19 17:35:26,965 INFO L78 Accepts]: Start accepts. Automaton has 12633 states and 52974 transitions. Word has length 27 [2021-02-19 17:35:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:26,965 INFO L480 AbstractCegarLoop]: Abstraction has 12633 states and 52974 transitions. [2021-02-19 17:35:26,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 12633 states and 52974 transitions. [2021-02-19 17:35:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:26,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:26,987 INFO L506 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] [2021-02-19 17:35:27,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:27,188 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:27,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1447721310, now seen corresponding path program 13 times [2021-02-19 17:35:27,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:27,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282190531] [2021-02-19 17:35:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:27,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282190531] [2021-02-19 17:35:27,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756699777] [2021-02-19 17:35:27,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999988924] [2021-02-19 17:35:27,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:27,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:27,587 INFO L87 Difference]: Start difference. First operand 12633 states and 52974 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:27,781 INFO L93 Difference]: Finished difference Result 13876 states and 57371 transitions. [2021-02-19 17:35:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:27,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:27,811 INFO L225 Difference]: With dead ends: 13876 [2021-02-19 17:35:27,811 INFO L226 Difference]: Without dead ends: 13825 [2021-02-19 17:35:27,812 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-02-19 17:35:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13229. [2021-02-19 17:35:28,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13229 states, 13228 states have (on average 4.175839129120049) internal successors, (55238), 13228 states have internal predecessors, (55238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13229 states to 13229 states and 55238 transitions. [2021-02-19 17:35:28,038 INFO L78 Accepts]: Start accepts. Automaton has 13229 states and 55238 transitions. Word has length 27 [2021-02-19 17:35:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:28,038 INFO L480 AbstractCegarLoop]: Abstraction has 13229 states and 55238 transitions. [2021-02-19 17:35:28,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 13229 states and 55238 transitions. [2021-02-19 17:35:28,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:28,060 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:28,060 INFO L506 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] [2021-02-19 17:35:28,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 17:35:28,261 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:28,262 INFO L82 PathProgramCache]: Analyzing trace with hash 662306130, now seen corresponding path program 14 times [2021-02-19 17:35:28,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:28,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825336148] [2021-02-19 17:35:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:28,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825336148] [2021-02-19 17:35:28,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644549025] [2021-02-19 17:35:28,299 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:28,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:28,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-02-19 17:35:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145697411] [2021-02-19 17:35:28,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 17:35:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 17:35:28,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:28,431 INFO L87 Difference]: Start difference. First operand 13229 states and 55238 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:28,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:28,896 INFO L93 Difference]: Finished difference Result 14694 states and 60468 transitions. [2021-02-19 17:35:28,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:35:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 27 [2021-02-19 17:35:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:28,939 INFO L225 Difference]: With dead ends: 14694 [2021-02-19 17:35:28,939 INFO L226 Difference]: Without dead ends: 14592 [2021-02-19 17:35:28,939 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-19 17:35:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14592 states. [2021-02-19 17:35:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14592 to 13580. [2021-02-19 17:35:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13580 states, 13579 states have (on average 4.172472199720156) internal successors, (56658), 13579 states have internal predecessors, (56658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 56658 transitions. [2021-02-19 17:35:29,238 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 56658 transitions. Word has length 27 [2021-02-19 17:35:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:29,238 INFO L480 AbstractCegarLoop]: Abstraction has 13580 states and 56658 transitions. [2021-02-19 17:35:29,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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) [2021-02-19 17:35:29,238 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 56658 transitions. [2021-02-19 17:35:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 17:35:29,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:29,262 INFO L506 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] [2021-02-19 17:35:29,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 17:35:29,462 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:29,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1389086802, now seen corresponding path program 15 times [2021-02-19 17:35:29,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:29,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415465438] [2021-02-19 17:35:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:35:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415465438] [2021-02-19 17:35:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616846897] [2021-02-19 17:35:29,499 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:29,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:29,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:35:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:29,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:29,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-02-19 17:35:29,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109226203] [2021-02-19 17:35:29,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:35:29,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:35:29,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:29,640 INFO L87 Difference]: Start difference. First operand 13580 states and 56658 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:29,910 INFO L93 Difference]: Finished difference Result 14707 states and 60689 transitions. [2021-02-19 17:35:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:35:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 17:35:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:29,955 INFO L225 Difference]: With dead ends: 14707 [2021-02-19 17:35:29,955 INFO L226 Difference]: Without dead ends: 14656 [2021-02-19 17:35:29,955 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:35:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-02-19 17:35:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14011. [2021-02-19 17:35:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14011 states, 14010 states have (on average 4.164596716630978) internal successors, (58346), 14010 states have internal predecessors, (58346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14011 states to 14011 states and 58346 transitions. [2021-02-19 17:35:30,284 INFO L78 Accepts]: Start accepts. Automaton has 14011 states and 58346 transitions. Word has length 27 [2021-02-19 17:35:30,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:30,284 INFO L480 AbstractCegarLoop]: Abstraction has 14011 states and 58346 transitions. [2021-02-19 17:35:30,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 14011 states and 58346 transitions. [2021-02-19 17:35:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:30,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:30,309 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:30,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 17:35:30,510 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1989624744, now seen corresponding path program 16 times [2021-02-19 17:35:30,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:30,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139577172] [2021-02-19 17:35:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139577172] [2021-02-19 17:35:30,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896184069] [2021-02-19 17:35:30,551 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:30,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:30,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:30,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:30,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:30,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:35:30,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072172115] [2021-02-19 17:35:30,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:30,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:30,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:30,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:30,664 INFO L87 Difference]: Start difference. First operand 14011 states and 58346 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:31,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:31,937 INFO L93 Difference]: Finished difference Result 35846 states and 143690 transitions. [2021-02-19 17:35:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:35:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:32,027 INFO L225 Difference]: With dead ends: 35846 [2021-02-19 17:35:32,027 INFO L226 Difference]: Without dead ends: 35846 [2021-02-19 17:35:32,028 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:35:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35846 states. [2021-02-19 17:35:32,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35846 to 13413. [2021-02-19 17:35:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 4.137339695794811) internal successors, (55490), 13412 states have internal predecessors, (55490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 55490 transitions. [2021-02-19 17:35:32,404 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 55490 transitions. Word has length 29 [2021-02-19 17:35:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:32,404 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 55490 transitions. [2021-02-19 17:35:32,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 55490 transitions. [2021-02-19 17:35:32,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:32,433 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:32,433 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:32,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 17:35:32,641 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:32,641 INFO L82 PathProgramCache]: Analyzing trace with hash -576281000, now seen corresponding path program 17 times [2021-02-19 17:35:32,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:32,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018338463] [2021-02-19 17:35:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018338463] [2021-02-19 17:35:32,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482172618] [2021-02-19 17:35:32,674 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:32,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:35:32,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:32,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:32,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:32,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:32,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:35:32,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121211816] [2021-02-19 17:35:32,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:32,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:32,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:32,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:32,805 INFO L87 Difference]: Start difference. First operand 13413 states and 55490 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:33,405 INFO L93 Difference]: Finished difference Result 29402 states and 114209 transitions. [2021-02-19 17:35:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:35:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:33,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:33,472 INFO L225 Difference]: With dead ends: 29402 [2021-02-19 17:35:33,473 INFO L226 Difference]: Without dead ends: 29122 [2021-02-19 17:35:33,473 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:35:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29122 states. [2021-02-19 17:35:33,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29122 to 16597. [2021-02-19 17:35:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16597 states, 16596 states have (on average 4.1867317425885755) internal successors, (69483), 16596 states have internal predecessors, (69483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:33,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16597 states to 16597 states and 69483 transitions. [2021-02-19 17:35:33,839 INFO L78 Accepts]: Start accepts. Automaton has 16597 states and 69483 transitions. Word has length 29 [2021-02-19 17:35:33,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:33,840 INFO L480 AbstractCegarLoop]: Abstraction has 16597 states and 69483 transitions. [2021-02-19 17:35:33,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16597 states and 69483 transitions. [2021-02-19 17:35:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:33,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:33,867 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:34,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:34,068 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -387958732, now seen corresponding path program 18 times [2021-02-19 17:35:34,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:34,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711091039] [2021-02-19 17:35:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:34,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711091039] [2021-02-19 17:35:34,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159485081] [2021-02-19 17:35:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:34,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:34,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:34,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:34,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897332411] [2021-02-19 17:35:34,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:34,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:34,335 INFO L87 Difference]: Start difference. First operand 16597 states and 69483 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) [2021-02-19 17:35:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:34,797 INFO L93 Difference]: Finished difference Result 29479 states and 115492 transitions. [2021-02-19 17:35:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:35:34,798 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 29 [2021-02-19 17:35:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:34,866 INFO L225 Difference]: With dead ends: 29479 [2021-02-19 17:35:34,866 INFO L226 Difference]: Without dead ends: 29479 [2021-02-19 17:35:34,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:35:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29479 states. [2021-02-19 17:35:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29479 to 16486. [2021-02-19 17:35:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16486 states, 16485 states have (on average 4.176038823172581) internal successors, (68842), 16485 states have internal predecessors, (68842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16486 states to 16486 states and 68842 transitions. [2021-02-19 17:35:35,476 INFO L78 Accepts]: Start accepts. Automaton has 16486 states and 68842 transitions. Word has length 29 [2021-02-19 17:35:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:35,476 INFO L480 AbstractCegarLoop]: Abstraction has 16486 states and 68842 transitions. [2021-02-19 17:35:35,476 INFO L481 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) [2021-02-19 17:35:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 16486 states and 68842 transitions. [2021-02-19 17:35:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:35,515 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:35,515 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:35,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 17:35:35,734 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash 58652144, now seen corresponding path program 19 times [2021-02-19 17:35:35,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:35,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181747192] [2021-02-19 17:35:35,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:35,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181747192] [2021-02-19 17:35:35,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355977586] [2021-02-19 17:35:35,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:35,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:35,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:35,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573146214] [2021-02-19 17:35:35,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:35,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:35,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:35,877 INFO L87 Difference]: Start difference. First operand 16486 states and 68842 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) [2021-02-19 17:35:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:36,321 INFO L93 Difference]: Finished difference Result 21742 states and 87217 transitions. [2021-02-19 17:35:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:35:36,321 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 29 [2021-02-19 17:35:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:36,372 INFO L225 Difference]: With dead ends: 21742 [2021-02-19 17:35:36,372 INFO L226 Difference]: Without dead ends: 21722 [2021-02-19 17:35:36,373 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:35:36,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21722 states. [2021-02-19 17:35:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21722 to 16564. [2021-02-19 17:35:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16564 states, 16563 states have (on average 4.172372154802874) internal successors, (69107), 16563 states have internal predecessors, (69107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:36,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16564 states to 16564 states and 69107 transitions. [2021-02-19 17:35:36,998 INFO L78 Accepts]: Start accepts. Automaton has 16564 states and 69107 transitions. Word has length 29 [2021-02-19 17:35:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:36,998 INFO L480 AbstractCegarLoop]: Abstraction has 16564 states and 69107 transitions. [2021-02-19 17:35:36,998 INFO L481 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) [2021-02-19 17:35:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16564 states and 69107 transitions. [2021-02-19 17:35:37,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:37,030 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:37,030 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:37,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:37,231 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:37,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:37,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1828735756, now seen corresponding path program 20 times [2021-02-19 17:35:37,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:37,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575501809] [2021-02-19 17:35:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575501809] [2021-02-19 17:35:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808743536] [2021-02-19 17:35:37,260 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:37,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:37,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:37,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:35:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620459151] [2021-02-19 17:35:37,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:37,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:37,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:37,391 INFO L87 Difference]: Start difference. First operand 16564 states and 69107 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) [2021-02-19 17:35:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:37,965 INFO L93 Difference]: Finished difference Result 55537 states and 222253 transitions. [2021-02-19 17:35:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:35:37,966 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 29 [2021-02-19 17:35:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:38,114 INFO L225 Difference]: With dead ends: 55537 [2021-02-19 17:35:38,114 INFO L226 Difference]: Without dead ends: 55537 [2021-02-19 17:35:38,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:35:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55537 states. [2021-02-19 17:35:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55537 to 21381. [2021-02-19 17:35:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286623012160898) internal successors, (91648), 21380 states have internal predecessors, (91648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91648 transitions. [2021-02-19 17:35:38,975 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91648 transitions. Word has length 29 [2021-02-19 17:35:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:38,975 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91648 transitions. [2021-02-19 17:35:38,975 INFO L481 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) [2021-02-19 17:35:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91648 transitions. [2021-02-19 17:35:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:39,010 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:39,010 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:39,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:39,211 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 958631284, now seen corresponding path program 21 times [2021-02-19 17:35:39,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:39,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667592969] [2021-02-19 17:35:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:39,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667592969] [2021-02-19 17:35:39,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270547358] [2021-02-19 17:35:39,239 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:39,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:35:39,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:39,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:39,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:39,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:35:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601543408] [2021-02-19 17:35:39,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:39,367 INFO L87 Difference]: Start difference. First operand 21381 states and 91648 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:40,120 INFO L93 Difference]: Finished difference Result 35555 states and 142585 transitions. [2021-02-19 17:35:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:35:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:40,207 INFO L225 Difference]: With dead ends: 35555 [2021-02-19 17:35:40,207 INFO L226 Difference]: Without dead ends: 35499 [2021-02-19 17:35:40,208 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:35:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35499 states. [2021-02-19 17:35:40,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35499 to 21381. [2021-02-19 17:35:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21381 states, 21380 states have (on average 4.286155285313377) internal successors, (91638), 21380 states have internal predecessors, (91638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21381 states to 21381 states and 91638 transitions. [2021-02-19 17:35:40,938 INFO L78 Accepts]: Start accepts. Automaton has 21381 states and 91638 transitions. Word has length 29 [2021-02-19 17:35:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:40,938 INFO L480 AbstractCegarLoop]: Abstraction has 21381 states and 91638 transitions. [2021-02-19 17:35:40,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21381 states and 91638 transitions. [2021-02-19 17:35:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:40,977 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:40,977 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:41,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 17:35:41,179 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:41,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:41,179 INFO L82 PathProgramCache]: Analyzing trace with hash -100321296, now seen corresponding path program 22 times [2021-02-19 17:35:41,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:41,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99968090] [2021-02-19 17:35:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99968090] [2021-02-19 17:35:41,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627103005] [2021-02-19 17:35:41,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:41,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:41,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:41,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:41,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:35:41,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109966442] [2021-02-19 17:35:41,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:41,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:41,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:41,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:41,336 INFO L87 Difference]: Start difference. First operand 21381 states and 91638 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) [2021-02-19 17:35:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:42,041 INFO L93 Difference]: Finished difference Result 42043 states and 168835 transitions. [2021-02-19 17:35:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:35:42,041 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 29 [2021-02-19 17:35:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:42,153 INFO L225 Difference]: With dead ends: 42043 [2021-02-19 17:35:42,153 INFO L226 Difference]: Without dead ends: 42043 [2021-02-19 17:35:42,153 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:35:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42043 states. [2021-02-19 17:35:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42043 to 21474. [2021-02-19 17:35:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21474 states, 21473 states have (on average 4.284776230615191) internal successors, (92007), 21473 states have internal predecessors, (92007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21474 states to 21474 states and 92007 transitions. [2021-02-19 17:35:42,975 INFO L78 Accepts]: Start accepts. Automaton has 21474 states and 92007 transitions. Word has length 29 [2021-02-19 17:35:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:42,975 INFO L480 AbstractCegarLoop]: Abstraction has 21474 states and 92007 transitions. [2021-02-19 17:35:42,975 INFO L481 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) [2021-02-19 17:35:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21474 states and 92007 transitions. [2021-02-19 17:35:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:43,013 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:43,013 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:43,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:43,213 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:43,214 INFO L82 PathProgramCache]: Analyzing trace with hash 346289580, now seen corresponding path program 23 times [2021-02-19 17:35:43,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:43,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968829862] [2021-02-19 17:35:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968829862] [2021-02-19 17:35:43,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749041392] [2021-02-19 17:35:43,246 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:43,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:35:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:43,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:43,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:35:43,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884037048] [2021-02-19 17:35:43,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:43,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:43,365 INFO L87 Difference]: Start difference. First operand 21474 states and 92007 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) [2021-02-19 17:35:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:44,127 INFO L93 Difference]: Finished difference Result 42315 states and 169746 transitions. [2021-02-19 17:35:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:35:44,128 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 29 [2021-02-19 17:35:44,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:44,240 INFO L225 Difference]: With dead ends: 42315 [2021-02-19 17:35:44,240 INFO L226 Difference]: Without dead ends: 42275 [2021-02-19 17:35:44,240 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:35:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42275 states. [2021-02-19 17:35:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42275 to 21484. [2021-02-19 17:35:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 4.284038542103058) internal successors, (92034), 21483 states have internal predecessors, (92034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 92034 transitions. [2021-02-19 17:35:44,754 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 92034 transitions. Word has length 29 [2021-02-19 17:35:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:44,754 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 92034 transitions. [2021-02-19 17:35:44,755 INFO L481 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) [2021-02-19 17:35:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 92034 transitions. [2021-02-19 17:35:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:44,789 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:44,789 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:44,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 17:35:44,990 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:44,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:44,990 INFO L82 PathProgramCache]: Analyzing trace with hash -369067724, now seen corresponding path program 24 times [2021-02-19 17:35:44,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:44,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561492281] [2021-02-19 17:35:44,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561492281] [2021-02-19 17:35:45,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986096435] [2021-02-19 17:35:45,230 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:45,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:35:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:45,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:45,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:35:45,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407747421] [2021-02-19 17:35:45,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:35:45,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:45,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:35:45,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:45,363 INFO L87 Difference]: Start difference. First operand 21484 states and 92034 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) [2021-02-19 17:35:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:46,041 INFO L93 Difference]: Finished difference Result 36111 states and 146587 transitions. [2021-02-19 17:35:46,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:35:46,041 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 29 [2021-02-19 17:35:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:46,132 INFO L225 Difference]: With dead ends: 36111 [2021-02-19 17:35:46,132 INFO L226 Difference]: Without dead ends: 36111 [2021-02-19 17:35:46,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:35:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36111 states. [2021-02-19 17:35:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36111 to 20508. [2021-02-19 17:35:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20508 states, 20507 states have (on average 4.257131711123031) internal successors, (87301), 20507 states have internal predecessors, (87301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20508 states to 20508 states and 87301 transitions. [2021-02-19 17:35:46,792 INFO L78 Accepts]: Start accepts. Automaton has 20508 states and 87301 transitions. Word has length 29 [2021-02-19 17:35:46,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:46,792 INFO L480 AbstractCegarLoop]: Abstraction has 20508 states and 87301 transitions. [2021-02-19 17:35:46,793 INFO L481 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) [2021-02-19 17:35:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 20508 states and 87301 transitions. [2021-02-19 17:35:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:46,827 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:46,827 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:47,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:47,028 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:47,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2090653586, now seen corresponding path program 25 times [2021-02-19 17:35:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:47,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843476372] [2021-02-19 17:35:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843476372] [2021-02-19 17:35:47,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164836727] [2021-02-19 17:35:47,065 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:47,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:47,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:47,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:35:47,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254592258] [2021-02-19 17:35:47,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:35:47,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:35:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:47,214 INFO L87 Difference]: Start difference. First operand 20508 states and 87301 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) [2021-02-19 17:35:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:47,972 INFO L93 Difference]: Finished difference Result 36261 states and 145187 transitions. [2021-02-19 17:35:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:35:47,972 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 29 [2021-02-19 17:35:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:48,065 INFO L225 Difference]: With dead ends: 36261 [2021-02-19 17:35:48,065 INFO L226 Difference]: Without dead ends: 36201 [2021-02-19 17:35:48,065 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:35:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36201 states. [2021-02-19 17:35:48,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36201 to 20844. [2021-02-19 17:35:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 20843 states have (on average 4.25269874778103) internal successors, (88639), 20843 states have internal predecessors, (88639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 88639 transitions. [2021-02-19 17:35:48,742 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 88639 transitions. Word has length 29 [2021-02-19 17:35:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:48,742 INFO L480 AbstractCegarLoop]: Abstraction has 20844 states and 88639 transitions. [2021-02-19 17:35:48,742 INFO L481 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) [2021-02-19 17:35:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 88639 transitions. [2021-02-19 17:35:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:48,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:48,776 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:48,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 17:35:48,977 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1499342920, now seen corresponding path program 26 times [2021-02-19 17:35:48,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:48,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982319933] [2021-02-19 17:35:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982319933] [2021-02-19 17:35:49,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302797035] [2021-02-19 17:35:49,011 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:49,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:49,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:49,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:35:49,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853562240] [2021-02-19 17:35:49,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:35:49,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:35:49,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:49,113 INFO L87 Difference]: Start difference. First operand 20844 states and 88639 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-02-19 17:35:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:50,106 INFO L93 Difference]: Finished difference Result 44495 states and 179467 transitions. [2021-02-19 17:35:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:35:50,107 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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 29 [2021-02-19 17:35:50,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:50,235 INFO L225 Difference]: With dead ends: 44495 [2021-02-19 17:35:50,235 INFO L226 Difference]: Without dead ends: 44495 [2021-02-19 17:35:50,235 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:35:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44495 states. [2021-02-19 17:35:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44495 to 20105. [2021-02-19 17:35:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20105 states, 20104 states have (on average 4.225875447672105) internal successors, (84957), 20104 states have internal predecessors, (84957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20105 states to 20105 states and 84957 transitions. [2021-02-19 17:35:50,740 INFO L78 Accepts]: Start accepts. Automaton has 20105 states and 84957 transitions. Word has length 29 [2021-02-19 17:35:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:50,740 INFO L480 AbstractCegarLoop]: Abstraction has 20105 states and 84957 transitions. [2021-02-19 17:35:50,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 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) [2021-02-19 17:35:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20105 states and 84957 transitions. [2021-02-19 17:35:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:50,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:50,774 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:50,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 17:35:50,975 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1395757112, now seen corresponding path program 27 times [2021-02-19 17:35:50,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:50,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558353294] [2021-02-19 17:35:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:51,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558353294] [2021-02-19 17:35:51,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744816904] [2021-02-19 17:35:51,019 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:51,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:35:51,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:51,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:51,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:51,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 17:35:51,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645816381] [2021-02-19 17:35:51,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 17:35:51,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 17:35:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:35:51,166 INFO L87 Difference]: Start difference. First operand 20105 states and 84957 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:51,968 INFO L93 Difference]: Finished difference Result 29398 states and 116855 transitions. [2021-02-19 17:35:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:35:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:52,038 INFO L225 Difference]: With dead ends: 29398 [2021-02-19 17:35:52,039 INFO L226 Difference]: Without dead ends: 29314 [2021-02-19 17:35:52,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:35:52,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29314 states. [2021-02-19 17:35:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29314 to 19357. [2021-02-19 17:35:52,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19357 states, 19356 states have (on average 4.232434387270097) internal successors, (81923), 19356 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19357 states to 19357 states and 81923 transitions. [2021-02-19 17:35:52,437 INFO L78 Accepts]: Start accepts. Automaton has 19357 states and 81923 transitions. Word has length 29 [2021-02-19 17:35:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:52,437 INFO L480 AbstractCegarLoop]: Abstraction has 19357 states and 81923 transitions. [2021-02-19 17:35:52,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19357 states and 81923 transitions. [2021-02-19 17:35:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:52,469 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:52,469 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:52,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:35:52,675 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:52,675 INFO L82 PathProgramCache]: Analyzing trace with hash 926814068, now seen corresponding path program 28 times [2021-02-19 17:35:52,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:52,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626365303] [2021-02-19 17:35:52,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626365303] [2021-02-19 17:35:52,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843465154] [2021-02-19 17:35:52,706 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:52,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:35:52,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:52,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:52,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:52,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:52,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924994663] [2021-02-19 17:35:52,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:52,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:52,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:52,817 INFO L87 Difference]: Start difference. First operand 19357 states and 81923 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:53,002 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-02-19 17:35:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:53,478 INFO L93 Difference]: Finished difference Result 39779 states and 158195 transitions. [2021-02-19 17:35:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:35:53,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:53,579 INFO L225 Difference]: With dead ends: 39779 [2021-02-19 17:35:53,579 INFO L226 Difference]: Without dead ends: 39779 [2021-02-19 17:35:53,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:35:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39779 states. [2021-02-19 17:35:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39779 to 20557. [2021-02-19 17:35:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20557 states, 20556 states have (on average 4.262502432379841) internal successors, (87620), 20556 states have internal predecessors, (87620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 87620 transitions. [2021-02-19 17:35:54,408 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 87620 transitions. Word has length 29 [2021-02-19 17:35:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:54,408 INFO L480 AbstractCegarLoop]: Abstraction has 20557 states and 87620 transitions. [2021-02-19 17:35:54,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 87620 transitions. [2021-02-19 17:35:54,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:54,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:54,447 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:54,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 17:35:54,647 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:54,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:54,648 INFO L82 PathProgramCache]: Analyzing trace with hash -580786188, now seen corresponding path program 29 times [2021-02-19 17:35:54,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:54,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330836557] [2021-02-19 17:35:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:54,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330836557] [2021-02-19 17:35:54,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105071075] [2021-02-19 17:35:54,676 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:54,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:35:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:54,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:54,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:54,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851075449] [2021-02-19 17:35:54,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:54,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:54,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:54,787 INFO L87 Difference]: Start difference. First operand 20557 states and 87620 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:55,289 INFO L93 Difference]: Finished difference Result 27775 states and 112554 transitions. [2021-02-19 17:35:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:35:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:35:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:55,353 INFO L225 Difference]: With dead ends: 27775 [2021-02-19 17:35:55,353 INFO L226 Difference]: Without dead ends: 27747 [2021-02-19 17:35:55,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:35:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27747 states. [2021-02-19 17:35:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27747 to 20546. [2021-02-19 17:35:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20546 states, 20545 states have (on average 4.26186420053541) internal successors, (87560), 20545 states have internal predecessors, (87560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:56,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20546 states to 20546 states and 87560 transitions. [2021-02-19 17:35:56,044 INFO L78 Accepts]: Start accepts. Automaton has 20546 states and 87560 transitions. Word has length 29 [2021-02-19 17:35:56,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:56,044 INFO L480 AbstractCegarLoop]: Abstraction has 20546 states and 87560 transitions. [2021-02-19 17:35:56,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:56,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20546 states and 87560 transitions. [2021-02-19 17:35:56,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:56,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:56,080 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:56,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:56,281 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1639738768, now seen corresponding path program 30 times [2021-02-19 17:35:56,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:56,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036841486] [2021-02-19 17:35:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036841486] [2021-02-19 17:35:56,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319764246] [2021-02-19 17:35:56,310 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:35:56,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:35:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:56,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:56,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:56,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168359868] [2021-02-19 17:35:56,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:56,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:56,426 INFO L87 Difference]: Start difference. First operand 20546 states and 87560 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 17:35:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:57,174 INFO L93 Difference]: Finished difference Result 31505 states and 127549 transitions. [2021-02-19 17:35:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:35:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2021-02-19 17:35:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:57,249 INFO L225 Difference]: With dead ends: 31505 [2021-02-19 17:35:57,249 INFO L226 Difference]: Without dead ends: 31505 [2021-02-19 17:35:57,249 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:35:57,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31505 states. [2021-02-19 17:35:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31505 to 20639. [2021-02-19 17:35:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.2605388119003775) internal successors, (87929), 20638 states have internal predecessors, (87929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87929 transitions. [2021-02-19 17:35:57,914 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87929 transitions. Word has length 29 [2021-02-19 17:35:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:57,914 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87929 transitions. [2021-02-19 17:35:57,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 17:35:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87929 transitions. [2021-02-19 17:35:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:57,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:57,948 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:58,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-02-19 17:35:58,148 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1193127892, now seen corresponding path program 31 times [2021-02-19 17:35:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:58,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610056638] [2021-02-19 17:35:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610056638] [2021-02-19 17:35:58,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121762744] [2021-02-19 17:35:58,175 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:58,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:58,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:35:58,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698844491] [2021-02-19 17:35:58,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:35:58,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:35:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:35:58,266 INFO L87 Difference]: Start difference. First operand 20639 states and 87929 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 17:35:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:35:58,772 INFO L93 Difference]: Finished difference Result 38173 states and 150936 transitions. [2021-02-19 17:35:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:35:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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 29 [2021-02-19 17:35:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:35:58,861 INFO L225 Difference]: With dead ends: 38173 [2021-02-19 17:35:58,861 INFO L226 Difference]: Without dead ends: 38153 [2021-02-19 17:35:58,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:35:58,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38153 states. [2021-02-19 17:35:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38153 to 20639. [2021-02-19 17:35:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20639 states, 20638 states have (on average 4.260054268824499) internal successors, (87919), 20638 states have internal predecessors, (87919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:35:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20639 states to 20639 states and 87919 transitions. [2021-02-19 17:35:59,518 INFO L78 Accepts]: Start accepts. Automaton has 20639 states and 87919 transitions. Word has length 29 [2021-02-19 17:35:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:35:59,518 INFO L480 AbstractCegarLoop]: Abstraction has 20639 states and 87919 transitions. [2021-02-19 17:35:59,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 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) [2021-02-19 17:35:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20639 states and 87919 transitions. [2021-02-19 17:35:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:35:59,552 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:35:59,553 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:35:59,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:59,753 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:35:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:35:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1908485196, now seen corresponding path program 32 times [2021-02-19 17:35:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:35:59,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74241839] [2021-02-19 17:35:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:35:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:35:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:35:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74241839] [2021-02-19 17:35:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23370110] [2021-02-19 17:35:59,791 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:35:59,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:35:59,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:35:59,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:35:59,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:35:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:35:59,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:35:59,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:35:59,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147197479] [2021-02-19 17:35:59,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:35:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:35:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:35:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:35:59,917 INFO L87 Difference]: Start difference. First operand 20639 states and 87919 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:01,453 INFO L93 Difference]: Finished difference Result 44621 states and 181666 transitions. [2021-02-19 17:36:01,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 17:36:01,454 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:01,594 INFO L225 Difference]: With dead ends: 44621 [2021-02-19 17:36:01,594 INFO L226 Difference]: Without dead ends: 44621 [2021-02-19 17:36:01,594 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 17:36:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44621 states. [2021-02-19 17:36:02,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44621 to 21011. [2021-02-19 17:36:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 4.254878629224179) internal successors, (89395), 21010 states have internal predecessors, (89395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 89395 transitions. [2021-02-19 17:36:02,218 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 89395 transitions. Word has length 29 [2021-02-19 17:36:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:02,218 INFO L480 AbstractCegarLoop]: Abstraction has 21011 states and 89395 transitions. [2021-02-19 17:36:02,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 89395 transitions. [2021-02-19 17:36:02,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:02,256 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:02,256 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:02,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:02,457 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 551236114, now seen corresponding path program 33 times [2021-02-19 17:36:02,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:02,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628144193] [2021-02-19 17:36:02,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628144193] [2021-02-19 17:36:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897063523] [2021-02-19 17:36:02,498 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:02,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:02,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:02,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:02,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:02,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271812756] [2021-02-19 17:36:02,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:02,644 INFO L87 Difference]: Start difference. First operand 21011 states and 89395 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:03,576 INFO L93 Difference]: Finished difference Result 44719 states and 175059 transitions. [2021-02-19 17:36:03,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:36:03,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:03,682 INFO L225 Difference]: With dead ends: 44719 [2021-02-19 17:36:03,682 INFO L226 Difference]: Without dead ends: 44519 [2021-02-19 17:36:03,683 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:36:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44519 states. [2021-02-19 17:36:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44519 to 21017. [2021-02-19 17:36:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21016 states have (on average 4.253235629996193) internal successors, (89386), 21016 states have internal predecessors, (89386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 89386 transitions. [2021-02-19 17:36:04,547 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 89386 transitions. Word has length 29 [2021-02-19 17:36:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:04,547 INFO L480 AbstractCegarLoop]: Abstraction has 21017 states and 89386 transitions. [2021-02-19 17:36:04,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:04,548 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 89386 transitions. [2021-02-19 17:36:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:04,591 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:04,591 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:04,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:04,792 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:04,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:04,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1958174096, now seen corresponding path program 34 times [2021-02-19 17:36:04,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:04,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593655813] [2021-02-19 17:36:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:04,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:04,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593655813] [2021-02-19 17:36:04,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252052481] [2021-02-19 17:36:04,828 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:04,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:04,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:04,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:04,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406883189] [2021-02-19 17:36:04,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:04,932 INFO L87 Difference]: Start difference. First operand 21017 states and 89386 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) [2021-02-19 17:36:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:06,092 INFO L93 Difference]: Finished difference Result 38364 states and 158236 transitions. [2021-02-19 17:36:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 17:36:06,092 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 29 [2021-02-19 17:36:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:06,190 INFO L225 Difference]: With dead ends: 38364 [2021-02-19 17:36:06,190 INFO L226 Difference]: Without dead ends: 38344 [2021-02-19 17:36:06,190 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:36:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38344 states. [2021-02-19 17:36:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38344 to 21400. [2021-02-19 17:36:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21400 states, 21399 states have (on average 4.237441001915977) internal successors, (90677), 21399 states have internal predecessors, (90677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:06,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21400 states to 21400 states and 90677 transitions. [2021-02-19 17:36:06,881 INFO L78 Accepts]: Start accepts. Automaton has 21400 states and 90677 transitions. Word has length 29 [2021-02-19 17:36:06,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:06,881 INFO L480 AbstractCegarLoop]: Abstraction has 21400 states and 90677 transitions. [2021-02-19 17:36:06,881 INFO L481 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) [2021-02-19 17:36:06,881 INFO L276 IsEmpty]: Start isEmpty. Operand 21400 states and 90677 transitions. [2021-02-19 17:36:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:06,915 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:06,915 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:07,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:07,116 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash 347305102, now seen corresponding path program 35 times [2021-02-19 17:36:07,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:07,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814967492] [2021-02-19 17:36:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:07,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:07,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814967492] [2021-02-19 17:36:07,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332375821] [2021-02-19 17:36:07,158 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:07,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:36:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:07,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:07,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:07,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:07,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 17:36:07,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424188947] [2021-02-19 17:36:07,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:07,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:07,256 INFO L87 Difference]: Start difference. First operand 21400 states and 90677 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) [2021-02-19 17:36:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:07,857 INFO L93 Difference]: Finished difference Result 37284 states and 146566 transitions. [2021-02-19 17:36:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:36:07,857 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 29 [2021-02-19 17:36:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:07,943 INFO L225 Difference]: With dead ends: 37284 [2021-02-19 17:36:07,943 INFO L226 Difference]: Without dead ends: 37184 [2021-02-19 17:36:07,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:36:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37184 states. [2021-02-19 17:36:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37184 to 21702. [2021-02-19 17:36:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21702 states, 21701 states have (on average 4.22432145984056) internal successors, (91672), 21701 states have internal predecessors, (91672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21702 states to 21702 states and 91672 transitions. [2021-02-19 17:36:08,692 INFO L78 Accepts]: Start accepts. Automaton has 21702 states and 91672 transitions. Word has length 29 [2021-02-19 17:36:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:08,692 INFO L480 AbstractCegarLoop]: Abstraction has 21702 states and 91672 transitions. [2021-02-19 17:36:08,692 INFO L481 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) [2021-02-19 17:36:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21702 states and 91672 transitions. [2021-02-19 17:36:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:08,731 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:08,731 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:08,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 17:36:08,932 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 720767840, now seen corresponding path program 16 times [2021-02-19 17:36:08,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:08,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459795] [2021-02-19 17:36:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:08,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459795] [2021-02-19 17:36:08,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838352656] [2021-02-19 17:36:08,972 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:09,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:09,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:09,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:36:09,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211647760] [2021-02-19 17:36:09,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:09,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:09,108 INFO L87 Difference]: Start difference. First operand 21702 states and 91672 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:10,585 INFO L93 Difference]: Finished difference Result 62502 states and 262210 transitions. [2021-02-19 17:36:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:36:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 [2021-02-19 17:36:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:10,765 INFO L225 Difference]: With dead ends: 62502 [2021-02-19 17:36:10,766 INFO L226 Difference]: Without dead ends: 62502 [2021-02-19 17:36:10,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:36:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62502 states. [2021-02-19 17:36:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62502 to 25980. [2021-02-19 17:36:11,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25980 states, 25979 states have (on average 4.299280187844028) internal successors, (111691), 25979 states have internal predecessors, (111691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25980 states to 25980 states and 111691 transitions. [2021-02-19 17:36:11,783 INFO L78 Accepts]: Start accepts. Automaton has 25980 states and 111691 transitions. Word has length 29 [2021-02-19 17:36:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:11,783 INFO L480 AbstractCegarLoop]: Abstraction has 25980 states and 111691 transitions. [2021-02-19 17:36:11,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 25980 states and 111691 transitions. [2021-02-19 17:36:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:11,831 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:11,831 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:12,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:12,032 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash -706086176, now seen corresponding path program 17 times [2021-02-19 17:36:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:12,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594057482] [2021-02-19 17:36:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:12,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594057482] [2021-02-19 17:36:12,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334002704] [2021-02-19 17:36:12,070 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:12,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:36:12,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:12,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:12,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:36:12,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544326251] [2021-02-19 17:36:12,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:12,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:12,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:12,191 INFO L87 Difference]: Start difference. First operand 25980 states and 111691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:12,886 INFO L93 Difference]: Finished difference Result 55112 states and 227311 transitions. [2021-02-19 17:36:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:36:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:36:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:13,035 INFO L225 Difference]: With dead ends: 55112 [2021-02-19 17:36:13,035 INFO L226 Difference]: Without dead ends: 54872 [2021-02-19 17:36:13,035 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:36:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54872 states. [2021-02-19 17:36:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54872 to 34226. [2021-02-19 17:36:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34226 states, 34225 states have (on average 4.397428780131483) internal successors, (150502), 34225 states have internal predecessors, (150502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34226 states to 34226 states and 150502 transitions. [2021-02-19 17:36:14,103 INFO L78 Accepts]: Start accepts. Automaton has 34226 states and 150502 transitions. Word has length 29 [2021-02-19 17:36:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:14,104 INFO L480 AbstractCegarLoop]: Abstraction has 34226 states and 150502 transitions. [2021-02-19 17:36:14,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 34226 states and 150502 transitions. [2021-02-19 17:36:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:14,166 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:14,166 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:14,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 17:36:14,367 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1994837280, now seen corresponding path program 18 times [2021-02-19 17:36:14,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:14,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649153264] [2021-02-19 17:36:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649153264] [2021-02-19 17:36:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934384640] [2021-02-19 17:36:14,388 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:14,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:14,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:14,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:14,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66728609] [2021-02-19 17:36:14,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:14,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:14,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:14,481 INFO L87 Difference]: Start difference. First operand 34226 states and 150502 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:15,339 INFO L93 Difference]: Finished difference Result 55218 states and 230451 transitions. [2021-02-19 17:36:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:36:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-02-19 17:36:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:15,507 INFO L225 Difference]: With dead ends: 55218 [2021-02-19 17:36:15,508 INFO L226 Difference]: Without dead ends: 55218 [2021-02-19 17:36:15,508 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:36:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55218 states. [2021-02-19 17:36:16,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55218 to 33975. [2021-02-19 17:36:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33975 states, 33974 states have (on average 4.384441043150645) internal successors, (148957), 33974 states have internal predecessors, (148957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33975 states to 33975 states and 148957 transitions. [2021-02-19 17:36:16,636 INFO L78 Accepts]: Start accepts. Automaton has 33975 states and 148957 transitions. Word has length 29 [2021-02-19 17:36:16,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:16,636 INFO L480 AbstractCegarLoop]: Abstraction has 33975 states and 148957 transitions. [2021-02-19 17:36:16,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:16,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33975 states and 148957 transitions. [2021-02-19 17:36:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:16,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:16,699 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:16,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:16,899 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1005370600, now seen corresponding path program 19 times [2021-02-19 17:36:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:16,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811134791] [2021-02-19 17:36:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811134791] [2021-02-19 17:36:16,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630124878] [2021-02-19 17:36:16,935 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:16,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:17,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:17,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:17,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010763215] [2021-02-19 17:36:17,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:17,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:17,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:17,052 INFO L87 Difference]: Start difference. First operand 33975 states and 148957 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:17,587 INFO L93 Difference]: Finished difference Result 43486 states and 183757 transitions. [2021-02-19 17:36:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:36:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:17,698 INFO L225 Difference]: With dead ends: 43486 [2021-02-19 17:36:17,698 INFO L226 Difference]: Without dead ends: 43461 [2021-02-19 17:36:17,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:36:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43461 states. [2021-02-19 17:36:18,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43461 to 34031. [2021-02-19 17:36:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34031 states, 34030 states have (on average 4.383338230972671) internal successors, (149165), 34030 states have internal predecessors, (149165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34031 states to 34031 states and 149165 transitions. [2021-02-19 17:36:18,757 INFO L78 Accepts]: Start accepts. Automaton has 34031 states and 149165 transitions. Word has length 29 [2021-02-19 17:36:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:18,757 INFO L480 AbstractCegarLoop]: Abstraction has 34031 states and 149165 transitions. [2021-02-19 17:36:18,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:18,757 INFO L276 IsEmpty]: Start isEmpty. Operand 34031 states and 149165 transitions. [2021-02-19 17:36:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:18,819 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:18,820 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:19,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:19,020 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:19,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:19,020 INFO L82 PathProgramCache]: Analyzing trace with hash 662133332, now seen corresponding path program 20 times [2021-02-19 17:36:19,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:19,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457668424] [2021-02-19 17:36:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:19,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457668424] [2021-02-19 17:36:19,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909434303] [2021-02-19 17:36:19,040 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:19,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:19,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:19,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:19,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743754178] [2021-02-19 17:36:19,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:19,176 INFO L87 Difference]: Start difference. First operand 34031 states and 149165 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-02-19 17:36:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:20,363 INFO L93 Difference]: Finished difference Result 91021 states and 382461 transitions. [2021-02-19 17:36:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:36:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 29 [2021-02-19 17:36:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:20,638 INFO L225 Difference]: With dead ends: 91021 [2021-02-19 17:36:20,638 INFO L226 Difference]: Without dead ends: 91021 [2021-02-19 17:36:20,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:36:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91021 states. [2021-02-19 17:36:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91021 to 37194. [2021-02-19 17:36:22,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.447261581480386) internal successors, (165407), 37193 states have internal predecessors, (165407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165407 transitions. [2021-02-19 17:36:22,165 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165407 transitions. Word has length 29 [2021-02-19 17:36:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:22,165 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165407 transitions. [2021-02-19 17:36:22,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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) [2021-02-19 17:36:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165407 transitions. [2021-02-19 17:36:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:22,234 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:22,234 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:22,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:22,434 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 424169940, now seen corresponding path program 21 times [2021-02-19 17:36:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:22,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200989665] [2021-02-19 17:36:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200989665] [2021-02-19 17:36:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400610166] [2021-02-19 17:36:22,456 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:22,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:22,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:22,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:22,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:22,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:22,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:22,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485668641] [2021-02-19 17:36:22,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:22,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:22,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:22,568 INFO L87 Difference]: Start difference. First operand 37194 states and 165407 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:23,663 INFO L93 Difference]: Finished difference Result 65131 states and 273960 transitions. [2021-02-19 17:36:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:36:23,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:23,850 INFO L225 Difference]: With dead ends: 65131 [2021-02-19 17:36:23,850 INFO L226 Difference]: Without dead ends: 65083 [2021-02-19 17:36:23,850 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:36:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65083 states. [2021-02-19 17:36:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65083 to 37194. [2021-02-19 17:36:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37194 states, 37193 states have (on average 4.446938940123141) internal successors, (165395), 37193 states have internal predecessors, (165395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37194 states to 37194 states and 165395 transitions. [2021-02-19 17:36:25,042 INFO L78 Accepts]: Start accepts. Automaton has 37194 states and 165395 transitions. Word has length 29 [2021-02-19 17:36:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:25,042 INFO L480 AbstractCegarLoop]: Abstraction has 37194 states and 165395 transitions. [2021-02-19 17:36:25,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 37194 states and 165395 transitions. [2021-02-19 17:36:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:25,111 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:25,111 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:25,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:25,312 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1256326700, now seen corresponding path program 22 times [2021-02-19 17:36:25,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:25,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304204678] [2021-02-19 17:36:25,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304204678] [2021-02-19 17:36:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248186948] [2021-02-19 17:36:25,337 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:25,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:25,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:25,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:25,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:25,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:25,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:25,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777147440] [2021-02-19 17:36:25,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:25,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:25,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:25,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:25,479 INFO L87 Difference]: Start difference. First operand 37194 states and 165395 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:26,792 INFO L93 Difference]: Finished difference Result 80813 states and 340534 transitions. [2021-02-19 17:36:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:36:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:27,070 INFO L225 Difference]: With dead ends: 80813 [2021-02-19 17:36:27,070 INFO L226 Difference]: Without dead ends: 80813 [2021-02-19 17:36:27,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:36:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80813 states. [2021-02-19 17:36:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80813 to 37432. [2021-02-19 17:36:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445646656514653) internal successors, (166405), 37431 states have internal predecessors, (166405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166405 transitions. [2021-02-19 17:36:28,466 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166405 transitions. Word has length 29 [2021-02-19 17:36:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:28,466 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166405 transitions. [2021-02-19 17:36:28,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166405 transitions. [2021-02-19 17:36:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:28,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:28,535 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:28,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 17:36:28,736 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash -266860020, now seen corresponding path program 23 times [2021-02-19 17:36:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:28,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974288421] [2021-02-19 17:36:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:28,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974288421] [2021-02-19 17:36:28,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108285480] [2021-02-19 17:36:28,760 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:28,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:36:28,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:28,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:28,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:28,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 9 [2021-02-19 17:36:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094184785] [2021-02-19 17:36:28,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:28,876 INFO L87 Difference]: Start difference. First operand 37432 states and 166405 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) [2021-02-19 17:36:30,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:30,010 INFO L93 Difference]: Finished difference Result 70173 states and 294528 transitions. [2021-02-19 17:36:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:36:30,011 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 29 [2021-02-19 17:36:30,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:30,266 INFO L225 Difference]: With dead ends: 70173 [2021-02-19 17:36:30,266 INFO L226 Difference]: Without dead ends: 70123 [2021-02-19 17:36:30,266 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:36:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-02-19 17:36:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 37432. [2021-02-19 17:36:31,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37432 states, 37431 states have (on average 4.445326066629264) internal successors, (166393), 37431 states have internal predecessors, (166393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:31,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37432 states to 37432 states and 166393 transitions. [2021-02-19 17:36:31,570 INFO L78 Accepts]: Start accepts. Automaton has 37432 states and 166393 transitions. Word has length 29 [2021-02-19 17:36:31,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:31,570 INFO L480 AbstractCegarLoop]: Abstraction has 37432 states and 166393 transitions. [2021-02-19 17:36:31,570 INFO L481 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) [2021-02-19 17:36:31,570 INFO L276 IsEmpty]: Start isEmpty. Operand 37432 states and 166393 transitions. [2021-02-19 17:36:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:31,643 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:31,643 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:31,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:31,843 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2130581360, now seen corresponding path program 24 times [2021-02-19 17:36:31,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:31,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695419303] [2021-02-19 17:36:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695419303] [2021-02-19 17:36:31,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164721354] [2021-02-19 17:36:31,881 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:31,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:36:31,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:31,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:32,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:32,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:32,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990177451] [2021-02-19 17:36:32,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:32,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:32,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:32,020 INFO L87 Difference]: Start difference. First operand 37432 states and 166393 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:33,021 INFO L93 Difference]: Finished difference Result 71774 states and 303967 transitions. [2021-02-19 17:36:33,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:36:33,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:33,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:33,648 INFO L225 Difference]: With dead ends: 71774 [2021-02-19 17:36:33,648 INFO L226 Difference]: Without dead ends: 71774 [2021-02-19 17:36:33,649 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:36:33,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71774 states. [2021-02-19 17:36:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71774 to 35977. [2021-02-19 17:36:34,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35977 states, 35976 states have (on average 4.413970424727596) internal successors, (158797), 35976 states have internal predecessors, (158797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35977 states to 35977 states and 158797 transitions. [2021-02-19 17:36:34,934 INFO L78 Accepts]: Start accepts. Automaton has 35977 states and 158797 transitions. Word has length 29 [2021-02-19 17:36:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:34,934 INFO L480 AbstractCegarLoop]: Abstraction has 35977 states and 158797 transitions. [2021-02-19 17:36:34,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35977 states and 158797 transitions. [2021-02-19 17:36:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:35,057 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:35,057 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:35,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:35,257 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:35,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1264317122, now seen corresponding path program 25 times [2021-02-19 17:36:35,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:35,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630475096] [2021-02-19 17:36:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:35,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630475096] [2021-02-19 17:36:35,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168174445] [2021-02-19 17:36:35,289 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:35,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:35,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:35,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719820382] [2021-02-19 17:36:35,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:35,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:35,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:35,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:35,428 INFO L87 Difference]: Start difference. First operand 35977 states and 158797 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-02-19 17:36:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:36,129 INFO L93 Difference]: Finished difference Result 58206 states and 243463 transitions. [2021-02-19 17:36:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:36:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 29 [2021-02-19 17:36:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:36,288 INFO L225 Difference]: With dead ends: 58206 [2021-02-19 17:36:36,289 INFO L226 Difference]: Without dead ends: 58131 [2021-02-19 17:36:36,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:36:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58131 states. [2021-02-19 17:36:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58131 to 36089. [2021-02-19 17:36:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36089 states, 36088 states have (on average 4.4117989359343825) internal successors, (159213), 36088 states have internal predecessors, (159213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36089 states to 36089 states and 159213 transitions. [2021-02-19 17:36:37,452 INFO L78 Accepts]: Start accepts. Automaton has 36089 states and 159213 transitions. Word has length 29 [2021-02-19 17:36:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:37,452 INFO L480 AbstractCegarLoop]: Abstraction has 36089 states and 159213 transitions. [2021-02-19 17:36:37,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2021-02-19 17:36:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 36089 states and 159213 transitions. [2021-02-19 17:36:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:37,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:37,518 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:37,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-02-19 17:36:37,720 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1584549016, now seen corresponding path program 26 times [2021-02-19 17:36:37,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:37,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044701493] [2021-02-19 17:36:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044701493] [2021-02-19 17:36:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129745324] [2021-02-19 17:36:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:37,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:37,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:37,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:37,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783011308] [2021-02-19 17:36:37,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:37,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:37,899 INFO L87 Difference]: Start difference. First operand 36089 states and 159213 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) [2021-02-19 17:36:39,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:39,164 INFO L93 Difference]: Finished difference Result 73446 states and 309536 transitions. [2021-02-19 17:36:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:36:39,165 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 29 [2021-02-19 17:36:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:39,379 INFO L225 Difference]: With dead ends: 73446 [2021-02-19 17:36:39,379 INFO L226 Difference]: Without dead ends: 73446 [2021-02-19 17:36:39,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=823, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:36:39,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73446 states. [2021-02-19 17:36:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73446 to 35349. [2021-02-19 17:36:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35349 states, 35348 states have (on average 4.388536833767115) internal successors, (155126), 35348 states have internal predecessors, (155126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:40,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35349 states to 35349 states and 155126 transitions. [2021-02-19 17:36:40,616 INFO L78 Accepts]: Start accepts. Automaton has 35349 states and 155126 transitions. Word has length 29 [2021-02-19 17:36:40,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:40,616 INFO L480 AbstractCegarLoop]: Abstraction has 35349 states and 155126 transitions. [2021-02-19 17:36:40,616 INFO L481 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) [2021-02-19 17:36:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 35349 states and 155126 transitions. [2021-02-19 17:36:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:40,681 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:40,681 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:40,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:40,882 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash 534995992, now seen corresponding path program 27 times [2021-02-19 17:36:40,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:40,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756880629] [2021-02-19 17:36:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:40,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756880629] [2021-02-19 17:36:40,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34311180] [2021-02-19 17:36:40,909 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:40,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:36:40,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:40,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:41,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:41,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-02-19 17:36:41,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230861527] [2021-02-19 17:36:41,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:36:41,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:41,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:36:41,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:36:41,015 INFO L87 Difference]: Start difference. First operand 35349 states and 155126 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:41,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:41,681 INFO L93 Difference]: Finished difference Result 54059 states and 225007 transitions. [2021-02-19 17:36:41,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:36:41,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:42,332 INFO L225 Difference]: With dead ends: 54059 [2021-02-19 17:36:42,333 INFO L226 Difference]: Without dead ends: 53987 [2021-02-19 17:36:42,333 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:36:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53987 states. [2021-02-19 17:36:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53987 to 33989. [2021-02-19 17:36:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.398140520183595) internal successors, (149484), 33988 states have internal predecessors, (149484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149484 transitions. [2021-02-19 17:36:43,067 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149484 transitions. Word has length 29 [2021-02-19 17:36:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:43,067 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149484 transitions. [2021-02-19 17:36:43,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149484 transitions. [2021-02-19 17:36:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:43,129 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:43,129 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:43,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 17:36:43,330 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -981310124, now seen corresponding path program 28 times [2021-02-19 17:36:43,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:43,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150476953] [2021-02-19 17:36:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:43,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150476953] [2021-02-19 17:36:43,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186700750] [2021-02-19 17:36:43,354 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:43,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:36:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:43,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:43,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:43,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:43,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401230897] [2021-02-19 17:36:43,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:43,452 INFO L87 Difference]: Start difference. First operand 33989 states and 149484 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:44,393 INFO L93 Difference]: Finished difference Result 63659 states and 263324 transitions. [2021-02-19 17:36:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:36:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:44,569 INFO L225 Difference]: With dead ends: 63659 [2021-02-19 17:36:44,570 INFO L226 Difference]: Without dead ends: 63659 [2021-02-19 17:36:44,570 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:36:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63659 states. [2021-02-19 17:36:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63659 to 33989. [2021-02-19 17:36:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33989 states, 33988 states have (on average 4.391138048723079) internal successors, (149246), 33988 states have internal predecessors, (149246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:45,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33989 states to 33989 states and 149246 transitions. [2021-02-19 17:36:45,669 INFO L78 Accepts]: Start accepts. Automaton has 33989 states and 149246 transitions. Word has length 29 [2021-02-19 17:36:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:45,669 INFO L480 AbstractCegarLoop]: Abstraction has 33989 states and 149246 transitions. [2021-02-19 17:36:45,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:45,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33989 states and 149246 transitions. [2021-02-19 17:36:45,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:45,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:45,730 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:45,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 17:36:45,930 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:45,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1219273516, now seen corresponding path program 29 times [2021-02-19 17:36:45,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:45,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488436285] [2021-02-19 17:36:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488436285] [2021-02-19 17:36:45,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053799693] [2021-02-19 17:36:45,955 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:45,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:36:45,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:46,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:46,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:46,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977721375] [2021-02-19 17:36:46,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:46,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:46,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:46,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:46,068 INFO L87 Difference]: Start difference. First operand 33989 states and 149246 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:46,620 INFO L93 Difference]: Finished difference Result 49482 states and 206551 transitions. [2021-02-19 17:36:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:36:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-02-19 17:36:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:46,758 INFO L225 Difference]: With dead ends: 49482 [2021-02-19 17:36:46,758 INFO L226 Difference]: Without dead ends: 49458 [2021-02-19 17:36:46,758 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:36:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49458 states. [2021-02-19 17:36:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49458 to 33537. [2021-02-19 17:36:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33537 states, 33536 states have (on average 4.385376908396947) internal successors, (147068), 33536 states have internal predecessors, (147068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33537 states to 33537 states and 147068 transitions. [2021-02-19 17:36:47,929 INFO L78 Accepts]: Start accepts. Automaton has 33537 states and 147068 transitions. Word has length 29 [2021-02-19 17:36:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:47,929 INFO L480 AbstractCegarLoop]: Abstraction has 33537 states and 147068 transitions. [2021-02-19 17:36:47,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33537 states and 147068 transitions. [2021-02-19 17:36:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:47,990 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:47,990 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:48,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:48,191 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1395197140, now seen corresponding path program 30 times [2021-02-19 17:36:48,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:48,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559709519] [2021-02-19 17:36:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:48,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559709519] [2021-02-19 17:36:48,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192807900] [2021-02-19 17:36:48,211 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:48,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:36:48,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:48,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:48,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:48,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276058050] [2021-02-19 17:36:48,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:48,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:48,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:48,304 INFO L87 Difference]: Start difference. First operand 33537 states and 147068 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:49,435 INFO L93 Difference]: Finished difference Result 58652 states and 245549 transitions. [2021-02-19 17:36:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:36:49,436 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 [2021-02-19 17:36:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:49,602 INFO L225 Difference]: With dead ends: 58652 [2021-02-19 17:36:49,602 INFO L226 Difference]: Without dead ends: 58652 [2021-02-19 17:36:49,602 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:36:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58652 states. [2021-02-19 17:36:50,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58652 to 33775. [2021-02-19 17:36:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.384378516018239) internal successors, (148078), 33774 states have internal predecessors, (148078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148078 transitions. [2021-02-19 17:36:50,923 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148078 transitions. Word has length 29 [2021-02-19 17:36:50,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:50,923 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148078 transitions. [2021-02-19 17:36:50,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2021-02-19 17:36:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148078 transitions. [2021-02-19 17:36:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:51,011 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:51,011 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:51,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:51,226 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:51,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:51,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1910303476, now seen corresponding path program 31 times [2021-02-19 17:36:51,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:51,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835741502] [2021-02-19 17:36:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:51,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835741502] [2021-02-19 17:36:51,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419898033] [2021-02-19 17:36:51,258 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:36:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:51,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:51,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-02-19 17:36:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495744723] [2021-02-19 17:36:51,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:36:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:36:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:36:51,396 INFO L87 Difference]: Start difference. First operand 33775 states and 148078 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:52,015 INFO L93 Difference]: Finished difference Result 57310 states and 235132 transitions. [2021-02-19 17:36:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:36:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:52,180 INFO L225 Difference]: With dead ends: 57310 [2021-02-19 17:36:52,180 INFO L226 Difference]: Without dead ends: 57285 [2021-02-19 17:36:52,180 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:36:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57285 states. [2021-02-19 17:36:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57285 to 33775. [2021-02-19 17:36:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33775 states, 33774 states have (on average 4.3840232131225205) internal successors, (148066), 33774 states have internal predecessors, (148066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33775 states to 33775 states and 148066 transitions. [2021-02-19 17:36:53,348 INFO L78 Accepts]: Start accepts. Automaton has 33775 states and 148066 transitions. Word has length 29 [2021-02-19 17:36:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:53,348 INFO L480 AbstractCegarLoop]: Abstraction has 33775 states and 148066 transitions. [2021-02-19 17:36:53,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 33775 states and 148066 transitions. [2021-02-19 17:36:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:53,411 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:53,412 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:53,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:53,612 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash 520942480, now seen corresponding path program 32 times [2021-02-19 17:36:53,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:53,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125906558] [2021-02-19 17:36:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:53,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125906558] [2021-02-19 17:36:53,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553020913] [2021-02-19 17:36:53,638 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:53,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:36:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:53,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058353557] [2021-02-19 17:36:53,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:53,746 INFO L87 Difference]: Start difference. First operand 33775 states and 148066 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:55,476 INFO L93 Difference]: Finished difference Result 79431 states and 334909 transitions. [2021-02-19 17:36:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 17:36:55,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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 [2021-02-19 17:36:55,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:55,717 INFO L225 Difference]: With dead ends: 79431 [2021-02-19 17:36:55,717 INFO L226 Difference]: Without dead ends: 79431 [2021-02-19 17:36:55,718 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 17:36:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79431 states. [2021-02-19 17:36:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79431 to 34251. [2021-02-19 17:36:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34251 states, 34250 states have (on average 4.38207299270073) internal successors, (150086), 34250 states have internal predecessors, (150086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34251 states to 34251 states and 150086 transitions. [2021-02-19 17:36:57,001 INFO L78 Accepts]: Start accepts. Automaton has 34251 states and 150086 transitions. Word has length 29 [2021-02-19 17:36:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:36:57,001 INFO L480 AbstractCegarLoop]: Abstraction has 34251 states and 150086 transitions. [2021-02-19 17:36:57,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 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) [2021-02-19 17:36:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34251 states and 150086 transitions. [2021-02-19 17:36:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:36:57,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:36:57,064 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:36:57,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:57,265 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:36:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:36:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1387206718, now seen corresponding path program 33 times [2021-02-19 17:36:57,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:36:57,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264933628] [2021-02-19 17:36:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:36:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:36:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 17:36:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264933628] [2021-02-19 17:36:57,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653499731] [2021-02-19 17:36:57,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:36:57,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:36:57,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:36:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:36:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:36:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:36:57,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:36:57,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-02-19 17:36:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862527622] [2021-02-19 17:36:57,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:36:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:36:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:36:57,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:36:57,415 INFO L87 Difference]: Start difference. First operand 34251 states and 150086 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:36:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:36:58,642 INFO L93 Difference]: Finished difference Result 73063 states and 296904 transitions. [2021-02-19 17:36:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:36:58,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 17:36:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:36:58,909 INFO L225 Difference]: With dead ends: 73063 [2021-02-19 17:36:58,910 INFO L226 Difference]: Without dead ends: 72813 [2021-02-19 17:36:58,910 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:36:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72813 states. [2021-02-19 17:36:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72813 to 34704. [2021-02-19 17:36:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34704 states, 34703 states have (on average 4.386681266749273) internal successors, (152231), 34703 states have internal predecessors, (152231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34704 states to 34704 states and 152231 transitions. [2021-02-19 17:37:00,201 INFO L78 Accepts]: Start accepts. Automaton has 34704 states and 152231 transitions. Word has length 29 [2021-02-19 17:37:00,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:00,201 INFO L480 AbstractCegarLoop]: Abstraction has 34704 states and 152231 transitions. [2021-02-19 17:37:00,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:00,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34704 states and 152231 transitions. [2021-02-19 17:37:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:00,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:00,270 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:00,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:00,483 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -425569136, now seen corresponding path program 34 times [2021-02-19 17:37:00,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:00,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617821293] [2021-02-19 17:37:00,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:00,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617821293] [2021-02-19 17:37:00,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901531604] [2021-02-19 17:37:00,517 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:00,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:37:00,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:00,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:00,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:00,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:37:00,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904881204] [2021-02-19 17:37:00,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:00,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:00,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:00,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:00,636 INFO L87 Difference]: Start difference. First operand 34704 states and 152231 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:01,937 INFO L93 Difference]: Finished difference Result 60164 states and 255426 transitions. [2021-02-19 17:37:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:37:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:37:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:02,118 INFO L225 Difference]: With dead ends: 60164 [2021-02-19 17:37:02,119 INFO L226 Difference]: Without dead ends: 60139 [2021-02-19 17:37:02,119 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=1243, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 17:37:02,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60139 states. [2021-02-19 17:37:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60139 to 34900. [2021-02-19 17:37:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34900 states, 34899 states have (on average 4.346571535001003) internal successors, (151691), 34899 states have internal predecessors, (151691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34900 states to 34900 states and 151691 transitions. [2021-02-19 17:37:03,296 INFO L78 Accepts]: Start accepts. Automaton has 34900 states and 151691 transitions. Word has length 29 [2021-02-19 17:37:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:03,296 INFO L480 AbstractCegarLoop]: Abstraction has 34900 states and 151691 transitions. [2021-02-19 17:37:03,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:03,296 INFO L276 IsEmpty]: Start isEmpty. Operand 34900 states and 151691 transitions. [2021-02-19 17:37:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 17:37:03,359 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:03,359 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:03,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 17:37:03,560 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1938936006, now seen corresponding path program 35 times [2021-02-19 17:37:03,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:03,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545646295] [2021-02-19 17:37:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545646295] [2021-02-19 17:37:03,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950662940] [2021-02-19 17:37:03,618 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:03,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:37:03,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 17:37:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:03,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:03,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 17:37:03,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081284922] [2021-02-19 17:37:03,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 17:37:03,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 17:37:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-19 17:37:03,725 INFO L87 Difference]: Start difference. First operand 34900 states and 151691 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:04,716 INFO L93 Difference]: Finished difference Result 58744 states and 238407 transitions. [2021-02-19 17:37:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:37:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-02-19 17:37:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:04,876 INFO L225 Difference]: With dead ends: 58744 [2021-02-19 17:37:04,876 INFO L226 Difference]: Without dead ends: 58603 [2021-02-19 17:37:04,876 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-02-19 17:37:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58603 states. [2021-02-19 17:37:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58603 to 35796. [2021-02-19 17:37:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35796 states, 35795 states have (on average 4.330828327978768) internal successors, (155022), 35795 states have internal predecessors, (155022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:05,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35796 states to 35796 states and 155022 transitions. [2021-02-19 17:37:05,977 INFO L78 Accepts]: Start accepts. Automaton has 35796 states and 155022 transitions. Word has length 29 [2021-02-19 17:37:05,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:05,977 INFO L480 AbstractCegarLoop]: Abstraction has 35796 states and 155022 transitions. [2021-02-19 17:37:05,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35796 states and 155022 transitions. [2021-02-19 17:37:06,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:37:06,041 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:06,041 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:06,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:06,246 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:06,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash -2075955494, now seen corresponding path program 36 times [2021-02-19 17:37:06,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:06,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555223895] [2021-02-19 17:37:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555223895] [2021-02-19 17:37:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582871073] [2021-02-19 17:37:06,307 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:06,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:37:06,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:37:06,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:37:06,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:37:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:37:06,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:37:06,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-02-19 17:37:06,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54996857] [2021-02-19 17:37:06,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:37:06,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:37:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:37:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:06,471 INFO L87 Difference]: Start difference. First operand 35796 states and 155022 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:37:06,943 INFO L93 Difference]: Finished difference Result 38312 states and 164159 transitions. [2021-02-19 17:37:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:37:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 17:37:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:37:07,045 INFO L225 Difference]: With dead ends: 38312 [2021-02-19 17:37:07,045 INFO L226 Difference]: Without dead ends: 38244 [2021-02-19 17:37:07,045 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:37:07,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38244 states. [2021-02-19 17:37:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38244 to 36866. [2021-02-19 17:37:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36866 states, 36865 states have (on average 4.320493693204937) internal successors, (159275), 36865 states have internal predecessors, (159275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36866 states to 36866 states and 159275 transitions. [2021-02-19 17:37:08,069 INFO L78 Accepts]: Start accepts. Automaton has 36866 states and 159275 transitions. Word has length 31 [2021-02-19 17:37:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:37:08,069 INFO L480 AbstractCegarLoop]: Abstraction has 36866 states and 159275 transitions. [2021-02-19 17:37:08,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:37:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36866 states and 159275 transitions. [2021-02-19 17:37:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 17:37:08,134 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:37:08,134 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:37:08,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:08,335 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:37:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:37:08,335 INFO L82 PathProgramCache]: Analyzing trace with hash 948308914, now seen corresponding path program 37 times [2021-02-19 17:37:08,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:37:08,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493280258] [2021-02-19 17:37:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:37:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 17:37:08,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493280258] [2021-02-19 17:37:08,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987422952] [2021-02-19 17:37:08,388 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:37:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:37:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:37:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates...