/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/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 17:15:38,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 17:15:38,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 17:15:38,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 17:15:38,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 17:15:38,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 17:15:38,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 17:15:38,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 17:15:38,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 17:15:38,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 17:15:38,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 17:15:38,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 17:15:38,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 17:15:38,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 17:15:38,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 17:15:38,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 17:15:38,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 17:15:38,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 17:15:38,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 17:15:38,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 17:15:38,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 17:15:38,756 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 17:15:38,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 17:15:38,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 17:15:38,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 17:15:38,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 17:15:38,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 17:15:38,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 17:15:38,766 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 17:15:38,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 17:15:38,767 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 17:15:38,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 17:15:38,768 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 17:15:38,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 17:15:38,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 17:15:38,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 17:15:38,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 17:15:38,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 17:15:38,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 17:15:38,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 17:15:38,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 17:15:38,800 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 17:15:38,866 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 17:15:38,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 17:15:38,867 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 17:15:38,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 17:15:38,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 17:15:38,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 17:15:38,870 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 17:15:38,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 17:15:38,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 17:15:38,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 17:15:38,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 17:15:38,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 17:15:38,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 17:15:38,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 17:15:38,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 17:15:38,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 17:15:38,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 17:15:38,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 17:15:38,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 17:15:38,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 17:15:38,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 17:15:38,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 17:15:38,874 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 17:15:38,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 17:15:38,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 17:15:39,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 17:15:39,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 17:15:39,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 17:15:39,189 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 17:15:39,190 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 17:15:39,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-02-19 17:15:39,191 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-02-19 17:15:39,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 17:15:39,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 17:15:39,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 17:15:39,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 17:15:39,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 17:15:39,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 17:15:39,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 17:15:39,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/1) ... [2021-02-19 17:15:39,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 17:15:39,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 17:15:39,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 17:15:39,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 17:15:39,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (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 17:15:39,708 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 17:15:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 17:15:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 17:15:39,709 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 17:15:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 17:15:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 17:15:39,709 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 17:15:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 17:15:39,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 17:15:39,710 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 17:15:39,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 17:15:39,848 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 17:15:39,850 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39 BoogieIcfgContainer [2021-02-19 17:15:39,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 17:15:39,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 17:15:39,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 17:15:39,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 17:15:39,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 05:15:39" (1/2) ... [2021-02-19 17:15:39,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@706b27da and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 05:15:39, skipping insertion in model container [2021-02-19 17:15:39,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 05:15:39" (2/2) ... [2021-02-19 17:15:39,856 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-02-19 17:15:39,860 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 17:15:39,861 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 17:15:39,864 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 17:15:39,864 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 17:15:39,887 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 17:15:39,901 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 17:15:39,916 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 17:15:39,916 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 17:15:39,916 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 17:15:39,916 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 17:15:39,917 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 17:15:39,917 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 17:15:39,917 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 17:15:39,917 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 17:15:39,924 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-02-19 17:15:39,933 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 17:15:39,941 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:39,941 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:39,942 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1258195471, now seen corresponding path program 1 times [2021-02-19 17:15:39,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:39,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620838766] [2021-02-19 17:15:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,117 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 17:15:40,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620838766] [2021-02-19 17:15:40,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 17:15:40,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 17:15:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120571727] [2021-02-19 17:15:40,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 17:15:40,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 17:15:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 17:15:40,139 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,166 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-02-19 17:15:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 17:15:40,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-02-19 17:15:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,177 INFO L225 Difference]: With dead ends: 54 [2021-02-19 17:15:40,177 INFO L226 Difference]: Without dead ends: 47 [2021-02-19 17:15:40,178 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 17:15:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-19 17:15:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-02-19 17:15:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-02-19 17:15:40,213 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-02-19 17:15:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,215 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-02-19 17:15:40,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-02-19 17:15:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:15:40,217 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,217 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:40,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 17:15:40,218 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1557094481, now seen corresponding path program 1 times [2021-02-19 17:15:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:40,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744617456] [2021-02-19 17:15:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,455 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 17:15:40,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744617456] [2021-02-19 17:15:40,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107373669] [2021-02-19 17:15:40,456 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 17:15:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:40,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:40,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:40,706 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 17:15:40,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:40,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-02-19 17:15:40,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761866117] [2021-02-19 17:15:40,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:40,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:40,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:40,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:40,710 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 17:15:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:40,830 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-02-19 17:15:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 13 [2021-02-19 17:15:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:40,832 INFO L225 Difference]: With dead ends: 65 [2021-02-19 17:15:40,832 INFO L226 Difference]: Without dead ends: 47 [2021-02-19 17:15:40,833 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-19 17:15:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-02-19 17:15:40,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-02-19 17:15:40,847 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-02-19 17:15:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:40,847 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-02-19 17:15:40,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 17:15:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-02-19 17:15:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:15:40,848 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:40,848 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 17:15:41,069 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,070 INFO L82 PathProgramCache]: Analyzing trace with hash -713541679, now seen corresponding path program 1 times [2021-02-19 17:15:41,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061118938] [2021-02-19 17:15:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,180 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 17:15:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061118938] [2021-02-19 17:15:41,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963526482] [2021-02-19 17:15:41,180 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 17:15:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 17:15:41,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:41,274 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 17:15:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-02-19 17:15:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482833946] [2021-02-19 17:15:41,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 17:15:41,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 17:15:41,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-02-19 17:15:41,281 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,318 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-02-19 17:15:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 17:15:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 17:15:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,320 INFO L225 Difference]: With dead ends: 52 [2021-02-19 17:15:41,320 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 17:15:41,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 17:15:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-02-19 17:15:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-02-19 17:15:41,339 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-02-19 17:15:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,340 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-02-19 17:15:41,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-02-19 17:15:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 17:15:41,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,341 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:41,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:41,563 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:41,563 INFO L82 PathProgramCache]: Analyzing trace with hash 983031761, now seen corresponding path program 2 times [2021-02-19 17:15:41,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:41,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206935482] [2021-02-19 17:15:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:41,666 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 17:15:41,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206935482] [2021-02-19 17:15:41,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280141102] [2021-02-19 17:15:41,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:41,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:41,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:41,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 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 17:15:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:41,770 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 17:15:41,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:41,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-02-19 17:15:41,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836499193] [2021-02-19 17:15:41,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 17:15:41,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:41,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 17:15:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 17:15:41,772 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17:15:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:41,875 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-02-19 17:15:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 17:15:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-02-19 17:15:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:41,879 INFO L225 Difference]: With dead ends: 64 [2021-02-19 17:15:41,880 INFO L226 Difference]: Without dead ends: 53 [2021-02-19 17:15:41,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-19 17:15:41,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-02-19 17:15:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-02-19 17:15:41,892 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-02-19 17:15:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:41,893 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-02-19 17:15:41,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 17:15:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-02-19 17:15:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:41,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:41,895 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,110 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1036234259, now seen corresponding path program 2 times [2021-02-19 17:15:42,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786428197] [2021-02-19 17:15:42,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,224 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 17:15:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786428197] [2021-02-19 17:15:42,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168319666] [2021-02-19 17:15:42,224 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 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 17:15:42,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:42,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:42,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:42,433 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 17:15:42,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:42,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 17:15:42,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869833065] [2021-02-19 17:15:42,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:42,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:42,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:42,435 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:42,617 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-02-19 17:15:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:42,620 INFO L225 Difference]: With dead ends: 73 [2021-02-19 17:15:42,620 INFO L226 Difference]: Without dead ends: 60 [2021-02-19 17:15:42,621 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-02-19 17:15:42,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-02-19 17:15:42,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-02-19 17:15:42,629 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-02-19 17:15:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:42,629 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-02-19 17:15:42,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-02-19 17:15:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:42,631 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:42,631 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:42,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,850 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:42,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1234401901, now seen corresponding path program 1 times [2021-02-19 17:15:42,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:42,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940544258] [2021-02-19 17:15:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,938 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 17:15:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940544258] [2021-02-19 17:15:42,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64014203] [2021-02-19 17:15:42,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,182 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 17:15:43,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:43,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-02-19 17:15:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186749264] [2021-02-19 17:15:43,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:15:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:15:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:43,184 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:43,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:43,360 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-02-19 17:15:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-02-19 17:15:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:43,361 INFO L225 Difference]: With dead ends: 69 [2021-02-19 17:15:43,361 INFO L226 Difference]: Without dead ends: 62 [2021-02-19 17:15:43,361 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:15:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-19 17:15:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-02-19 17:15:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-02-19 17:15:43,365 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-02-19 17:15:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:43,365 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-02-19 17:15:43,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-02-19 17:15:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:43,366 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:43,366 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:43,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-02-19 17:15:43,574 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:43,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1617122289, now seen corresponding path program 2 times [2021-02-19 17:15:43,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:43,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355730905] [2021-02-19 17:15:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:43,685 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 17:15:43,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355730905] [2021-02-19 17:15:43,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59698062] [2021-02-19 17:15:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:43,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:43,961 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 17:15:43,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:43,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-02-19 17:15:43,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987276758] [2021-02-19 17:15:43,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:15:43,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:15:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:43,964 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:44,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,109 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-02-19 17:15:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:44,110 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-02-19 17:15:44,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,111 INFO L225 Difference]: With dead ends: 73 [2021-02-19 17:15:44,111 INFO L226 Difference]: Without dead ends: 66 [2021-02-19 17:15:44,111 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:15:44,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-19 17:15:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-02-19 17:15:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-02-19 17:15:44,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-02-19 17:15:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,116 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-02-19 17:15:44,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-02-19 17:15:44,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:44,117 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,117 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:44,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:44,330 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash 462171539, now seen corresponding path program 3 times [2021-02-19 17:15:44,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:44,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786670151] [2021-02-19 17:15:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:44,428 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 17:15:44,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786670151] [2021-02-19 17:15:44,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756989975] [2021-02-19 17:15:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:44,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:15:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:44,675 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 17:15:44,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:44,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-02-19 17:15:44,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336068277] [2021-02-19 17:15:44,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:15:44,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:44,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:15:44,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:44,677 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:44,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:44,886 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-02-19 17:15:44,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:44,887 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-02-19 17:15:44,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:44,888 INFO L225 Difference]: With dead ends: 94 [2021-02-19 17:15:44,888 INFO L226 Difference]: Without dead ends: 87 [2021-02-19 17:15:44,888 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:15:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-19 17:15:44,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-02-19 17:15:44,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:44,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-02-19 17:15:44,896 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-02-19 17:15:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:44,900 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-02-19 17:15:44,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-02-19 17:15:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:44,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:44,904 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:45,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:45,126 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash 477632335, now seen corresponding path program 4 times [2021-02-19 17:15:45,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123844599] [2021-02-19 17:15:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,209 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 17:15:45,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123844599] [2021-02-19 17:15:45,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761392079] [2021-02-19 17:15:45,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:45,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:45,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:45,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:45,456 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 17:15:45,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:45,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-02-19 17:15:45,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375828046] [2021-02-19 17:15:45,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:15:45,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:45,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:15:45,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:45,460 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:45,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:45,653 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-02-19 17:15:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:45,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 15 [2021-02-19 17:15:45,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:45,654 INFO L225 Difference]: With dead ends: 81 [2021-02-19 17:15:45,654 INFO L226 Difference]: Without dead ends: 74 [2021-02-19 17:15:45,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:15:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-02-19 17:15:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-02-19 17:15:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-02-19 17:15:45,657 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-02-19 17:15:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:45,657 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-02-19 17:15:45,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 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 17:15:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-02-19 17:15:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:45,658 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:45,658 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:45,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-02-19 17:15:45,869 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash -604429757, now seen corresponding path program 5 times [2021-02-19 17:15:45,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:45,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779024477] [2021-02-19 17:15:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:45,967 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 17:15:45,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779024477] [2021-02-19 17:15:45,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145387776] [2021-02-19 17:15:45,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:46,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,150 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 17:15:46,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:46,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023420921] [2021-02-19 17:15:46,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:46,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:46,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:46,153 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,247 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-02-19 17:15:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:46,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,248 INFO L225 Difference]: With dead ends: 72 [2021-02-19 17:15:46,248 INFO L226 Difference]: Without dead ends: 65 [2021-02-19 17:15:46,249 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-02-19 17:15:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-02-19 17:15:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-02-19 17:15:46,251 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-02-19 17:15:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,252 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-02-19 17:15:46,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-02-19 17:15:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:46,252 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,252 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:46,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:46,458 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:46,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:46,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1474864071, now seen corresponding path program 6 times [2021-02-19 17:15:46,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:46,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144445082] [2021-02-19 17:15:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:46,541 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 17:15:46,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144445082] [2021-02-19 17:15:46,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195665156] [2021-02-19 17:15:46,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:46,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:15:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:46,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:46,705 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 17:15:46,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:46,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:46,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449076358] [2021-02-19 17:15:46,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:46,707 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:46,829 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-02-19 17:15:46,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:46,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:46,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:46,830 INFO L225 Difference]: With dead ends: 95 [2021-02-19 17:15:46,830 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:15:46,830 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:46,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:15:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-02-19 17:15:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-02-19 17:15:46,833 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-02-19 17:15:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:46,834 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-02-19 17:15:46,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-02-19 17:15:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:46,834 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:46,834 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:47,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,056 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:47,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1490324867, now seen corresponding path program 7 times [2021-02-19 17:15:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:47,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998152626] [2021-02-19 17:15:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,154 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 17:15:47,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998152626] [2021-02-19 17:15:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748725873] [2021-02-19 17:15:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:47,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,324 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 17:15:47,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:47,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:47,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564515803] [2021-02-19 17:15:47,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:47,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:47,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:47,326 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:47,479 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-02-19 17:15:47,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:47,481 INFO L225 Difference]: With dead ends: 82 [2021-02-19 17:15:47,481 INFO L226 Difference]: Without dead ends: 75 [2021-02-19 17:15:47,481 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-02-19 17:15:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-02-19 17:15:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-02-19 17:15:47,484 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-02-19 17:15:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:47,484 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-02-19 17:15:47,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-02-19 17:15:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:47,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:47,485 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:47,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-02-19 17:15:47,690 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:47,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -673932465, now seen corresponding path program 8 times [2021-02-19 17:15:47,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827163365] [2021-02-19 17:15:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:47,792 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 17:15:47,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827163365] [2021-02-19 17:15:47,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200028086] [2021-02-19 17:15:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:47,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:47,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:47,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:47,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:47,959 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 17:15:47,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:47,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:47,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635714586] [2021-02-19 17:15:47,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:47,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:47,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:47,962 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,103 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-02-19 17:15:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,105 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:15:48,105 INFO L226 Difference]: Without dead ends: 85 [2021-02-19 17:15:48,106 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:48,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-02-19 17:15:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-02-19 17:15:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-02-19 17:15:48,113 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-02-19 17:15:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,113 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-02-19 17:15:48,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-02-19 17:15:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:48,113 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,113 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 17:15:48,334 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash -658471669, now seen corresponding path program 9 times [2021-02-19 17:15:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069290328] [2021-02-19 17:15:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:48,414 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 17:15:48,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069290328] [2021-02-19 17:15:48,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839545365] [2021-02-19 17:15:48,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:48,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:15:48,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:48,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:48,585 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 17:15:48,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:48,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:48,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981805738] [2021-02-19 17:15:48,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:48,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:48,587 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:48,736 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-02-19 17:15:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:48,737 INFO L225 Difference]: With dead ends: 98 [2021-02-19 17:15:48,737 INFO L226 Difference]: Without dead ends: 91 [2021-02-19 17:15:48,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-19 17:15:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-02-19 17:15:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-02-19 17:15:48,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-02-19 17:15:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:48,743 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-02-19 17:15:48,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:48,743 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-02-19 17:15:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:48,743 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:48,743 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:48,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 17:15:48,960 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -87016863, now seen corresponding path program 10 times [2021-02-19 17:15:48,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:48,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142738841] [2021-02-19 17:15:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,050 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 17:15:49,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142738841] [2021-02-19 17:15:49,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756986371] [2021-02-19 17:15:49,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:49,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:49,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:49,204 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 17:15:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891137402] [2021-02-19 17:15:49,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:49,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:49,205 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,332 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-02-19 17:15:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:49,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,333 INFO L225 Difference]: With dead ends: 75 [2021-02-19 17:15:49,333 INFO L226 Difference]: Without dead ends: 68 [2021-02-19 17:15:49,335 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-02-19 17:15:49,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-02-19 17:15:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-02-19 17:15:49,338 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-02-19 17:15:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,338 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-02-19 17:15:49,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-02-19 17:15:49,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:49,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,339 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:49,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:49,554 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:49,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:49,554 INFO L82 PathProgramCache]: Analyzing trace with hash 281368523, now seen corresponding path program 11 times [2021-02-19 17:15:49,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:49,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118585037] [2021-02-19 17:15:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:49,646 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 17:15:49,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118585037] [2021-02-19 17:15:49,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304922796] [2021-02-19 17:15:49,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:49,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:49,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:49,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:49,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:49,784 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 17:15:49,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:49,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:49,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979150026] [2021-02-19 17:15:49,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:49,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:49,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:49,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:49,786 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:49,900 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-02-19 17:15:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:49,900 INFO L225 Difference]: With dead ends: 76 [2021-02-19 17:15:49,901 INFO L226 Difference]: Without dead ends: 69 [2021-02-19 17:15:49,901 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-02-19 17:15:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-02-19 17:15:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-02-19 17:15:49,903 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-02-19 17:15:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:49,903 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-02-19 17:15:49,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-02-19 17:15:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:49,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:49,904 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:50,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-02-19 17:15:50,125 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1934304945, now seen corresponding path program 12 times [2021-02-19 17:15:50,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:50,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897507433] [2021-02-19 17:15:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,205 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 17:15:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897507433] [2021-02-19 17:15:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153622174] [2021-02-19 17:15:50,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:50,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:15:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:50,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:50,337 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 17:15:50,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:50,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:50,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308035641] [2021-02-19 17:15:50,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:50,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:50,339 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:50,506 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-02-19 17:15:50,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:50,506 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:50,507 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:15:50,507 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:15:50,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:15:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-02-19 17:15:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-02-19 17:15:50,510 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-02-19 17:15:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:50,510 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-02-19 17:15:50,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-02-19 17:15:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:50,510 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:50,510 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:50,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 17:15:50,726 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1918844149, now seen corresponding path program 13 times [2021-02-19 17:15:50,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:50,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549524062] [2021-02-19 17:15:50,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,799 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 17:15:50,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549524062] [2021-02-19 17:15:50,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103833716] [2021-02-19 17:15:50,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:50,966 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 17:15:50,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:50,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:50,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902072917] [2021-02-19 17:15:50,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:50,968 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:51,140 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-02-19 17:15:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:51,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:51,142 INFO L225 Difference]: With dead ends: 86 [2021-02-19 17:15:51,142 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:15:51,142 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:15:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-02-19 17:15:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-02-19 17:15:51,144 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-02-19 17:15:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:51,144 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-02-19 17:15:51,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-02-19 17:15:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:51,144 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:51,145 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:51,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 17:15:51,358 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:51,358 INFO L82 PathProgramCache]: Analyzing trace with hash 211865815, now seen corresponding path program 14 times [2021-02-19 17:15:51,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:51,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384884040] [2021-02-19 17:15:51,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:51,448 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 17:15:51,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384884040] [2021-02-19 17:15:51,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220105636] [2021-02-19 17:15:51,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:51,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:51,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:51,610 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 17:15:51,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:51,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:51,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690493996] [2021-02-19 17:15:51,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:51,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:51,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:51,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:51,612 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:51,768 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-02-19 17:15:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:51,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:51,769 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:15:51,769 INFO L226 Difference]: Without dead ends: 89 [2021-02-19 17:15:51,770 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-19 17:15:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-02-19 17:15:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-02-19 17:15:51,774 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-02-19 17:15:51,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:51,774 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-02-19 17:15:51,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:51,774 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-02-19 17:15:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:51,774 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:51,775 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:51,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:51,996 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:51,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:51,996 INFO L82 PathProgramCache]: Analyzing trace with hash 227326611, now seen corresponding path program 15 times [2021-02-19 17:15:51,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:51,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753849997] [2021-02-19 17:15:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,070 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 17:15:52,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753849997] [2021-02-19 17:15:52,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78281393] [2021-02-19 17:15:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:52,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 17:15:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:52,193 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 17:15:52,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:52,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:52,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696012002] [2021-02-19 17:15:52,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:52,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:52,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:52,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:52,195 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:52,356 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-02-19 17:15:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:52,357 INFO L225 Difference]: With dead ends: 102 [2021-02-19 17:15:52,357 INFO L226 Difference]: Without dead ends: 95 [2021-02-19 17:15:52,357 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-19 17:15:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-02-19 17:15:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-02-19 17:15:52,359 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-02-19 17:15:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:52,359 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-02-19 17:15:52,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-02-19 17:15:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:52,360 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:52,360 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:52,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:52,570 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:52,570 INFO L82 PathProgramCache]: Analyzing trace with hash 798781417, now seen corresponding path program 16 times [2021-02-19 17:15:52,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:52,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473241135] [2021-02-19 17:15:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:52,636 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 17:15:52,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473241135] [2021-02-19 17:15:52,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054470414] [2021-02-19 17:15:52,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:52,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:52,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:52,784 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 17:15:52,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:52,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 17:15:52,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518579882] [2021-02-19 17:15:52,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:15:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:15:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:15:52,786 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:52,901 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-02-19 17:15:52,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:52,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:52,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:52,902 INFO L225 Difference]: With dead ends: 79 [2021-02-19 17:15:52,902 INFO L226 Difference]: Without dead ends: 72 [2021-02-19 17:15:52,902 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-02-19 17:15:52,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-02-19 17:15:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-02-19 17:15:52,904 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-02-19 17:15:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:52,905 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-02-19 17:15:52,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-02-19 17:15:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:52,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:52,905 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-02-19 17:15:53,128 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,128 INFO L82 PathProgramCache]: Analyzing trace with hash -882225773, now seen corresponding path program 17 times [2021-02-19 17:15:53,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835065638] [2021-02-19 17:15:53,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,203 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 17:15:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835065638] [2021-02-19 17:15:53,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581936040] [2021-02-19 17:15:53,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:53,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:53,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:53,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:53,352 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 17:15:53,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:53,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:15:53,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809534874] [2021-02-19 17:15:53,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:15:53,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:53,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:15:53,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:53,353 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:53,524 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-02-19 17:15:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:53,525 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:15:53,525 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:15:53,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:15:53,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-02-19 17:15:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-02-19 17:15:53,528 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-02-19 17:15:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:53,528 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-02-19 17:15:53,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:53,528 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-02-19 17:15:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:53,528 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:53,528 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:53,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 17:15:53,749 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash -866764977, now seen corresponding path program 18 times [2021-02-19 17:15:53,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:53,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713883471] [2021-02-19 17:15:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:53,833 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 17:15:53,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713883471] [2021-02-19 17:15:53,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564930101] [2021-02-19 17:15:53,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:15:53,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 17:15:53,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:53,997 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 17:15:53,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:53,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:15:53,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428644047] [2021-02-19 17:15:53,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:15:53,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:53,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:15:53,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:53,999 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,179 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-02-19 17:15:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,180 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:15:54,180 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:15:54,180 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:15:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-02-19 17:15:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-02-19 17:15:54,183 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-02-19 17:15:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,183 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-02-19 17:15:54,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,183 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-02-19 17:15:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:54,183 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,183 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:54,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:54,402 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:54,402 INFO L82 PathProgramCache]: Analyzing trace with hash -295310171, now seen corresponding path program 19 times [2021-02-19 17:15:54,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:54,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847686034] [2021-02-19 17:15:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:54,470 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 17:15:54,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847686034] [2021-02-19 17:15:54,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560120647] [2021-02-19 17:15:54,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:54,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:54,600 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 17:15:54,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:54,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:15:54,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59219091] [2021-02-19 17:15:54,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:15:54,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:54,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:15:54,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:54,601 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:54,762 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-02-19 17:15:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:54,763 INFO L225 Difference]: With dead ends: 85 [2021-02-19 17:15:54,763 INFO L226 Difference]: Without dead ends: 78 [2021-02-19 17:15:54,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:15:54,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-19 17:15:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-02-19 17:15:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-02-19 17:15:54,765 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-02-19 17:15:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:54,765 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-02-19 17:15:54,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-02-19 17:15:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:54,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:54,766 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:54,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 17:15:54,982 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:54,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:54,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1456288493, now seen corresponding path program 3 times [2021-02-19 17:15:54,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:54,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259995244] [2021-02-19 17:15:54,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:55,085 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 17:15:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259995244] [2021-02-19 17:15:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910493183] [2021-02-19 17:15:55,085 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 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 17:15:55,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:15:55,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:55,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 17:15:55,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:55,176 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 17:15:55,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:55,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 17:15:55,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548708552] [2021-02-19 17:15:55,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 17:15:55,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:55,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 17:15:55,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 17:15:55,177 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 17:15:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:55,326 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-02-19 17:15:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 17:15:55,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 15 [2021-02-19 17:15:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:55,327 INFO L225 Difference]: With dead ends: 92 [2021-02-19 17:15:55,327 INFO L226 Difference]: Without dead ends: 81 [2021-02-19 17:15:55,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-02-19 17:15:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-02-19 17:15:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-02-19 17:15:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-02-19 17:15:55,329 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-02-19 17:15:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:55,329 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-02-19 17:15:55,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 17:15:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-02-19 17:15:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 17:15:55,330 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:55,330 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:55,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:55,543 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:55,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -833165749, now seen corresponding path program 20 times [2021-02-19 17:15:55,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:55,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235386273] [2021-02-19 17:15:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:55,622 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 17:15:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235386273] [2021-02-19 17:15:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219548076] [2021-02-19 17:15:55,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:55,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:15:55,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:55,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:15:55,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:55,791 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 17:15:55,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:55,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 17:15:55,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123897280] [2021-02-19 17:15:55,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 17:15:55,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 17:15:55,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-02-19 17:15:55,792 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:55,896 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-02-19 17:15:55,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:15:55,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 17:15:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:55,897 INFO L225 Difference]: With dead ends: 86 [2021-02-19 17:15:55,897 INFO L226 Difference]: Without dead ends: 79 [2021-02-19 17:15:55,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:15:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-02-19 17:15:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-02-19 17:15:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-02-19 17:15:55,899 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-02-19 17:15:55,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:55,899 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-02-19 17:15:55,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-02-19 17:15:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:55,900 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:55,900 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 17:15:56,114 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1294232747, now seen corresponding path program 3 times [2021-02-19 17:15:56,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827281993] [2021-02-19 17:15:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:56,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827281993] [2021-02-19 17:15:56,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067079196] [2021-02-19 17:15:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:15:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:56,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:15:56,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:56,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-02-19 17:15:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953189512] [2021-02-19 17:15:56,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:15:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:15:56,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:15:56,332 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 17:15:56,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:56,493 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-02-19 17:15:56,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:15:56,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 17 [2021-02-19 17:15:56,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:56,494 INFO L225 Difference]: With dead ends: 97 [2021-02-19 17:15:56,494 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 17:15:56,494 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:15:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 17:15:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-02-19 17:15:56,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:56,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-02-19 17:15:56,495 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-02-19 17:15:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:56,495 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-02-19 17:15:56,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 17:15:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-02-19 17:15:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:56,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:56,496 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:56,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 17:15:56,696 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:56,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:56,697 INFO L82 PathProgramCache]: Analyzing trace with hash 730098389, now seen corresponding path program 21 times [2021-02-19 17:15:56,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:56,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551049758] [2021-02-19 17:15:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:56,792 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 17:15:56,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551049758] [2021-02-19 17:15:56,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169077753] [2021-02-19 17:15:56,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:56,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:15:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:15:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:56,984 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 17:15:56,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:56,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:15:56,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683658422] [2021-02-19 17:15:56,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:15:56,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:15:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:15:56,986 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:57,270 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-02-19 17:15:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:15:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:15:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:57,271 INFO L225 Difference]: With dead ends: 99 [2021-02-19 17:15:57,271 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 17:15:57,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:15:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 17:15:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-02-19 17:15:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-02-19 17:15:57,273 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-02-19 17:15:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:57,273 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-02-19 17:15:57,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-02-19 17:15:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:57,274 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:57,274 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:57,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 17:15:57,478 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash 347378001, now seen corresponding path program 22 times [2021-02-19 17:15:57,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:57,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687528781] [2021-02-19 17:15:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:57,567 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 17:15:57,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687528781] [2021-02-19 17:15:57,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787423697] [2021-02-19 17:15:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:57,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:15:57,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:57,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:15:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:57,752 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 17:15:57,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:57,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:15:57,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814118986] [2021-02-19 17:15:57,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:15:57,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:57,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:15:57,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:15:57,753 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:57,991 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-02-19 17:15:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:15:57,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:15:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:57,994 INFO L225 Difference]: With dead ends: 104 [2021-02-19 17:15:57,994 INFO L226 Difference]: Without dead ends: 97 [2021-02-19 17:15:57,996 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:15:57,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-02-19 17:15:57,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-02-19 17:15:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-02-19 17:15:57,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-02-19 17:15:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:57,998 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-02-19 17:15:57,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-02-19 17:15:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:57,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:57,999 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:58,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 17:15:58,215 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:58,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:58,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1868295467, now seen corresponding path program 23 times [2021-02-19 17:15:58,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:58,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510431581] [2021-02-19 17:15:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:58,314 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 17:15:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510431581] [2021-02-19 17:15:58,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651551389] [2021-02-19 17:15:58,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:58,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:15:58,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:15:58,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:58,500 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 17:15:58,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:58,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:15:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851936709] [2021-02-19 17:15:58,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:15:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:15:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:15:58,501 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:58,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:58,802 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-02-19 17:15:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:15:58,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:15:58,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:58,803 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:15:58,803 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 17:15:58,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:15:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 17:15:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-02-19 17:15:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-02-19 17:15:58,805 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-02-19 17:15:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:58,806 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-02-19 17:15:58,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:58,806 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-02-19 17:15:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:58,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:58,806 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:59,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,007 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:59,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:59,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1852834671, now seen corresponding path program 24 times [2021-02-19 17:15:59,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:59,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202661283] [2021-02-19 17:15:59,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,095 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 17:15:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202661283] [2021-02-19 17:15:59,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489998036] [2021-02-19 17:15:59,095 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 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 17:15:59,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:15:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:15:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:15:59,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:15:59,270 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 17:15:59,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:15:59,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:15:59,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838770903] [2021-02-19 17:15:59,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:15:59,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:15:59,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:15:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:15:59,272 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:15:59,617 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-02-19 17:15:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:15:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:15:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:15:59,618 INFO L225 Difference]: With dead ends: 113 [2021-02-19 17:15:59,618 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 17:15:59,618 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:15:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 17:15:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-02-19 17:15:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:15:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-02-19 17:15:59,621 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-02-19 17:15:59,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:15:59,621 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-02-19 17:15:59,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:15:59,621 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-02-19 17:15:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:15:59,621 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:15:59,622 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:15:59,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,842 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:15:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:15:59,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1290567825, now seen corresponding path program 25 times [2021-02-19 17:15:59,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:15:59,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020174786] [2021-02-19 17:15:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:15:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,939 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 17:15:59,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020174786] [2021-02-19 17:15:59,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442184002] [2021-02-19 17:15:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:15:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:15:59,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:15:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:00,113 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 17:16:00,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:00,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:00,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854247116] [2021-02-19 17:16:00,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:00,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:00,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:00,114 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:00,382 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-02-19 17:16:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:00,383 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:16:00,383 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:16:00,383 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:16:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-02-19 17:16:00,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:00,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-02-19 17:16:00,385 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-02-19 17:16:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:00,385 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-02-19 17:16:00,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-02-19 17:16:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:00,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:00,386 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:00,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:00,590 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1306028621, now seen corresponding path program 26 times [2021-02-19 17:16:00,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:00,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877224083] [2021-02-19 17:16:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:00,690 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 17:16:00,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877224083] [2021-02-19 17:16:00,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543198096] [2021-02-19 17:16:00,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:16:00,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:00,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:00,863 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 17:16:00,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:00,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:00,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098005808] [2021-02-19 17:16:00,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:00,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:00,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:00,865 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:01,176 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-02-19 17:16:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:01,177 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:16:01,177 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:16:01,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:16:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-02-19 17:16:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-02-19 17:16:01,180 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-02-19 17:16:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:01,180 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-02-19 17:16:01,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-02-19 17:16:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:01,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:01,181 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:01,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 17:16:01,390 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:01,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:01,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1877483427, now seen corresponding path program 27 times [2021-02-19 17:16:01,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:01,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420537375] [2021-02-19 17:16:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:01,479 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 17:16:01,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420537375] [2021-02-19 17:16:01,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367755936] [2021-02-19 17:16:01,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:01,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:01,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:01,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:01,655 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 17:16:01,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:01,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:01,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809351541] [2021-02-19 17:16:01,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:01,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:01,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:01,656 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:01,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:01,802 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-02-19 17:16:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:01,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:01,803 INFO L225 Difference]: With dead ends: 96 [2021-02-19 17:16:01,803 INFO L226 Difference]: Without dead ends: 89 [2021-02-19 17:16:01,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-19 17:16:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-02-19 17:16:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-02-19 17:16:01,805 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-02-19 17:16:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:01,805 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-02-19 17:16:01,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-02-19 17:16:01,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:01,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:01,806 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:02,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,007 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:02,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:02,007 INFO L82 PathProgramCache]: Analyzing trace with hash 492134997, now seen corresponding path program 28 times [2021-02-19 17:16:02,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:02,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703672870] [2021-02-19 17:16:02,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:02,103 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 17:16:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703672870] [2021-02-19 17:16:02,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244041137] [2021-02-19 17:16:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:02,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:02,352 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 17:16:02,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:02,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:02,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015407592] [2021-02-19 17:16:02,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:02,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:02,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:02,353 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:02,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:02,795 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-02-19 17:16:02,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:02,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-02-19 17:16:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:02,796 INFO L225 Difference]: With dead ends: 112 [2021-02-19 17:16:02,796 INFO L226 Difference]: Without dead ends: 76 [2021-02-19 17:16:02,797 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-19 17:16:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-02-19 17:16:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-02-19 17:16:02,798 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-02-19 17:16:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:02,798 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-02-19 17:16:02,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-02-19 17:16:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:02,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:02,799 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 17:16:03,014 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2049098483, now seen corresponding path program 29 times [2021-02-19 17:16:03,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949585628] [2021-02-19 17:16:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,113 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 17:16:03,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949585628] [2021-02-19 17:16:03,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906787204] [2021-02-19 17:16:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:03,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,306 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 17:16:03,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:03,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:03,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771629956] [2021-02-19 17:16:03,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:03,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:03,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:03,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:03,308 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:03,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:03,535 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-02-19 17:16:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:03,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:03,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:03,536 INFO L225 Difference]: With dead ends: 95 [2021-02-19 17:16:03,536 INFO L226 Difference]: Without dead ends: 88 [2021-02-19 17:16:03,536 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-02-19 17:16:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-02-19 17:16:03,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-02-19 17:16:03,538 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-02-19 17:16:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:03,538 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-02-19 17:16:03,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:03,539 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-02-19 17:16:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:03,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:03,539 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:03,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,746 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash 30195345, now seen corresponding path program 30 times [2021-02-19 17:16:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:03,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870454765] [2021-02-19 17:16:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:03,841 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 17:16:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870454765] [2021-02-19 17:16:03,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094628938] [2021-02-19 17:16:03,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:03,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:04,045 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 17:16:04,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:04,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756770255] [2021-02-19 17:16:04,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:04,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:04,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:04,047 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:04,335 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-02-19 17:16:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:04,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:04,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:04,336 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:16:04,336 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:16:04,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:04,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:16:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-02-19 17:16:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-02-19 17:16:04,338 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-02-19 17:16:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:04,338 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-02-19 17:16:04,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-02-19 17:16:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:04,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:04,339 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:04,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 17:16:04,554 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash 45656141, now seen corresponding path program 31 times [2021-02-19 17:16:04,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:04,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605906860] [2021-02-19 17:16:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,669 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 17:16:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605906860] [2021-02-19 17:16:04,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306427551] [2021-02-19 17:16:04,669 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 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 17:16:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:04,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:04,914 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 17:16:04,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:04,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121977875] [2021-02-19 17:16:04,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:04,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:04,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:04,916 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:05,258 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-02-19 17:16:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:05,259 INFO L225 Difference]: With dead ends: 122 [2021-02-19 17:16:05,259 INFO L226 Difference]: Without dead ends: 115 [2021-02-19 17:16:05,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-02-19 17:16:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-02-19 17:16:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-02-19 17:16:05,262 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-02-19 17:16:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:05,262 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-02-19 17:16:05,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-02-19 17:16:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:05,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:05,262 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:05,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 17:16:05,478 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:05,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:05,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2118601191, now seen corresponding path program 32 times [2021-02-19 17:16:05,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:05,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378444804] [2021-02-19 17:16:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:05,580 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 17:16:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378444804] [2021-02-19 17:16:05,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197003170] [2021-02-19 17:16:05,580 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:05,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:05,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:05,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:05,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:05,792 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 17:16:05,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:05,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:05,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587854336] [2021-02-19 17:16:05,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:05,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:05,793 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:06,124 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-02-19 17:16:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:06,125 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:16:06,125 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:16:06,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:16:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-02-19 17:16:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-02-19 17:16:06,127 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-02-19 17:16:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:06,128 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-02-19 17:16:06,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-02-19 17:16:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:06,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:06,128 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:06,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 17:16:06,349 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2103140395, now seen corresponding path program 33 times [2021-02-19 17:16:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:06,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280484937] [2021-02-19 17:16:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:06,452 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 17:16:06,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280484937] [2021-02-19 17:16:06,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508413433] [2021-02-19 17:16:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:06,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:06,677 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 17:16:06,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:06,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:06,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736325021] [2021-02-19 17:16:06,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:06,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:06,678 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:07,095 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-02-19 17:16:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:07,096 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:16:07,096 INFO L226 Difference]: Without dead ends: 138 [2021-02-19 17:16:07,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-19 17:16:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-02-19 17:16:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-02-19 17:16:07,099 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-02-19 17:16:07,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:07,099 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-02-19 17:16:07,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-02-19 17:16:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:07,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:07,100 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:07,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 17:16:07,310 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:07,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1531685589, now seen corresponding path program 34 times [2021-02-19 17:16:07,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:07,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282953671] [2021-02-19 17:16:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:07,405 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 17:16:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282953671] [2021-02-19 17:16:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682596122] [2021-02-19 17:16:07,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:07,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:07,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:07,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:07,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:07,618 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 17:16:07,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:07,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:07,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963593716] [2021-02-19 17:16:07,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:07,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:07,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:07,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:07,619 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:07,960 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-02-19 17:16:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:07,961 INFO L225 Difference]: With dead ends: 105 [2021-02-19 17:16:07,961 INFO L226 Difference]: Without dead ends: 98 [2021-02-19 17:16:07,961 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-02-19 17:16:07,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-02-19 17:16:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-02-19 17:16:07,963 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-02-19 17:16:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:07,963 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-02-19 17:16:07,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-02-19 17:16:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:07,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:07,964 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:08,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:08,174 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:08,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1082274517, now seen corresponding path program 35 times [2021-02-19 17:16:08,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:08,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802341064] [2021-02-19 17:16:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:08,290 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 17:16:08,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802341064] [2021-02-19 17:16:08,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311248097] [2021-02-19 17:16:08,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:08,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:08,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:08,473 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 17:16:08,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:08,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:08,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18194751] [2021-02-19 17:16:08,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:08,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:08,474 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:08,885 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-02-19 17:16:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:08,886 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:16:08,886 INFO L226 Difference]: Without dead ends: 147 [2021-02-19 17:16:08,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-19 17:16:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-02-19 17:16:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-02-19 17:16:08,888 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-02-19 17:16:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:08,889 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-02-19 17:16:08,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-02-19 17:16:08,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:08,889 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:08,889 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:09,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-02-19 17:16:09,110 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1097735313, now seen corresponding path program 36 times [2021-02-19 17:16:09,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:09,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017729066] [2021-02-19 17:16:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:09,211 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 17:16:09,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017729066] [2021-02-19 17:16:09,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335835704] [2021-02-19 17:16:09,211 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 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 17:16:09,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:09,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:09,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:09,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:09,429 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 17:16:09,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:09,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:09,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114610671] [2021-02-19 17:16:09,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:09,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:09,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:09,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:09,430 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:09,864 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-02-19 17:16:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:09,865 INFO L225 Difference]: With dead ends: 168 [2021-02-19 17:16:09,865 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:16:09,866 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:16:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-02-19 17:16:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-02-19 17:16:09,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-02-19 17:16:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:09,868 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-02-19 17:16:09,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-02-19 17:16:09,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:09,868 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:09,868 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:10,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:10,078 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1669190119, now seen corresponding path program 37 times [2021-02-19 17:16:10,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:10,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961998084] [2021-02-19 17:16:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:10,167 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 17:16:10,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961998084] [2021-02-19 17:16:10,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139914736] [2021-02-19 17:16:10,167 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:10,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:10,357 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 17:16:10,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:10,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:10,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480329046] [2021-02-19 17:16:10,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:10,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:10,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:10,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:10,358 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:10,697 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-02-19 17:16:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:10,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:10,698 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:16:10,698 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:16:10,698 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:10,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:16:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-02-19 17:16:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:10,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-02-19 17:16:10,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-02-19 17:16:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:10,700 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-02-19 17:16:10,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-02-19 17:16:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:10,700 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:10,700 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:10,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:10,906 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1188361643, now seen corresponding path program 38 times [2021-02-19 17:16:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180240217] [2021-02-19 17:16:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:10,990 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 17:16:10,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180240217] [2021-02-19 17:16:10,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954616371] [2021-02-19 17:16:10,990 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 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 17:16:11,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:11,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:11,174 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 17:16:11,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:11,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:11,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526545433] [2021-02-19 17:16:11,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:11,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:11,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:11,175 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:11,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:11,695 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-02-19 17:16:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:11,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-02-19 17:16:11,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:11,696 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:16:11,696 INFO L226 Difference]: Without dead ends: 107 [2021-02-19 17:16:11,697 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:16:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-02-19 17:16:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-02-19 17:16:11,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-02-19 17:16:11,699 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-02-19 17:16:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:11,699 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-02-19 17:16:11,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-02-19 17:16:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:11,699 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:11,699 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:11,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 17:16:11,906 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:11,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:11,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1571082031, now seen corresponding path program 39 times [2021-02-19 17:16:11,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:11,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019971416] [2021-02-19 17:16:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:11,990 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 17:16:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019971416] [2021-02-19 17:16:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105484305] [2021-02-19 17:16:11,990 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 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 17:16:12,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:12,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:12,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:12,242 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 17:16:12,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:12,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:12,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234105549] [2021-02-19 17:16:12,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:12,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:12,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:12,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:12,243 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:12,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:12,592 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-02-19 17:16:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-02-19 17:16:12,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:12,593 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:16:12,593 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:16:12,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:12,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:16:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-02-19 17:16:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:12,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-02-19 17:16:12,595 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-02-19 17:16:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:12,595 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-02-19 17:16:12,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-02-19 17:16:12,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:12,596 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:12,596 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:12,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 17:16:12,796 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 508211797, now seen corresponding path program 40 times [2021-02-19 17:16:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:12,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563469776] [2021-02-19 17:16:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:12,900 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 17:16:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563469776] [2021-02-19 17:16:12,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071558690] [2021-02-19 17:16:12,900 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 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 17:16:12,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:12,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:13,118 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 17:16:13,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:13,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:13,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106494437] [2021-02-19 17:16:13,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:13,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:13,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:13,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:13,119 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:13,723 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-02-19 17:16:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:16:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-02-19 17:16:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:13,724 INFO L225 Difference]: With dead ends: 182 [2021-02-19 17:16:13,724 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 17:16:13,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 17:16:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 17:16:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-02-19 17:16:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-02-19 17:16:13,726 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-02-19 17:16:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:13,726 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-02-19 17:16:13,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-02-19 17:16:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:13,727 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:13,727 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:13,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 17:16:13,927 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:13,927 INFO L82 PathProgramCache]: Analyzing trace with hash 523672593, now seen corresponding path program 41 times [2021-02-19 17:16:13,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:13,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983059811] [2021-02-19 17:16:13,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:14,026 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 17:16:14,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983059811] [2021-02-19 17:16:14,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223408961] [2021-02-19 17:16:14,026 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 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 17:16:14,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:14,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:14,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:14,284 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 17:16:14,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:14,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-02-19 17:16:14,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235825410] [2021-02-19 17:16:14,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:16:14,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:16:14,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:14,286 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:14,966 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-02-19 17:16:14,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:16:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-02-19 17:16:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:14,967 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:16:14,967 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:16:14,968 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:16:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:16:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-02-19 17:16:14,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-02-19 17:16:14,970 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-02-19 17:16:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:14,970 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-02-19 17:16:14,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17:16:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-02-19 17:16:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:14,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:14,970 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:15,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:15,171 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1131334541, now seen corresponding path program 42 times [2021-02-19 17:16:15,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:15,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824457666] [2021-02-19 17:16:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,248 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 17:16:15,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824457666] [2021-02-19 17:16:15,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397380827] [2021-02-19 17:16:15,249 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 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 17:16:15,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:15,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:15,415 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 17:16:15,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:15,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:15,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020803520] [2021-02-19 17:16:15,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:15,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:15,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:15,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:15,416 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:15,690 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-02-19 17:16:15,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:15,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:15,691 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:16:15,691 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 17:16:15,691 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 17:16:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-02-19 17:16:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-02-19 17:16:15,693 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-02-19 17:16:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:15,693 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-02-19 17:16:15,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:15,693 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-02-19 17:16:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:15,693 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:15,694 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:15,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 17:16:15,898 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash 208019857, now seen corresponding path program 43 times [2021-02-19 17:16:15,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:15,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239076445] [2021-02-19 17:16:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:15,989 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 17:16:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239076445] [2021-02-19 17:16:15,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003907045] [2021-02-19 17:16:15,989 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 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 17:16:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:16,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:16,128 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 17:16:16,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:16,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:16,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593444275] [2021-02-19 17:16:16,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:16,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:16,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:16,128 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:16,523 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-02-19 17:16:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:16,524 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:16:16,524 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:16:16,525 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:16,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:16:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-02-19 17:16:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-02-19 17:16:16,527 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-02-19 17:16:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:16,527 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-02-19 17:16:16,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-02-19 17:16:16,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:16,527 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:16,527 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:16,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 17:16:16,742 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:16,742 INFO L82 PathProgramCache]: Analyzing trace with hash 223480653, now seen corresponding path program 44 times [2021-02-19 17:16:16,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:16,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609904073] [2021-02-19 17:16:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:16,833 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 17:16:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609904073] [2021-02-19 17:16:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810280325] [2021-02-19 17:16:16,833 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 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 17:16:16,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:16,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:17,003 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 17:16:17,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:17,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:17,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973523301] [2021-02-19 17:16:17,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:17,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:17,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:17,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:17,004 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:17,475 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-02-19 17:16:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:17,476 INFO L225 Difference]: With dead ends: 175 [2021-02-19 17:16:17,476 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:16:17,476 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:16:17,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-02-19 17:16:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-02-19 17:16:17,478 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-02-19 17:16:17,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:17,478 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-02-19 17:16:17,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-02-19 17:16:17,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:17,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:17,479 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:17,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,698 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash 794935459, now seen corresponding path program 45 times [2021-02-19 17:16:17,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:17,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048993793] [2021-02-19 17:16:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:17,790 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 17:16:17,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048993793] [2021-02-19 17:16:17,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734135332] [2021-02-19 17:16:17,790 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:17,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:17,995 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 17:16:17,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:17,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:17,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78213622] [2021-02-19 17:16:17,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:17,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:17,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:17,997 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:18,410 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-02-19 17:16:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:18,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:18,411 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:16:18,411 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:16:18,411 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:16:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-02-19 17:16:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-02-19 17:16:18,413 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-02-19 17:16:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:18,413 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-02-19 17:16:18,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-02-19 17:16:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:18,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:18,414 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:18,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 17:16:18,630 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2062616303, now seen corresponding path program 46 times [2021-02-19 17:16:18,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:18,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144352583] [2021-02-19 17:16:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:18,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:18,716 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 17:16:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144352583] [2021-02-19 17:16:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262256619] [2021-02-19 17:16:18,717 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:18,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:18,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:18,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:18,922 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 17:16:18,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:18,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282918796] [2021-02-19 17:16:18,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:18,923 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:19,231 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-02-19 17:16:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:19,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:19,232 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:16:19,232 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:16:19,232 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:16:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-02-19 17:16:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-02-19 17:16:19,234 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-02-19 17:16:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:19,234 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-02-19 17:16:19,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:19,234 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-02-19 17:16:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:19,235 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:19,235 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:19,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,438 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:19,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1849630605, now seen corresponding path program 47 times [2021-02-19 17:16:19,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:19,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344416266] [2021-02-19 17:16:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:19,520 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 17:16:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344416266] [2021-02-19 17:16:19,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608970416] [2021-02-19 17:16:19,520 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:19,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:19,725 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 17:16:19,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:19,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:19,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052243345] [2021-02-19 17:16:19,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:19,726 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:20,121 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-02-19 17:16:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:20,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:20,123 INFO L225 Difference]: With dead ends: 134 [2021-02-19 17:16:20,123 INFO L226 Difference]: Without dead ends: 127 [2021-02-19 17:16:20,123 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:16:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-02-19 17:16:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-02-19 17:16:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-02-19 17:16:20,124 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-02-19 17:16:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:20,125 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-02-19 17:16:20,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-02-19 17:16:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:20,125 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:20,125 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:20,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-02-19 17:16:20,325 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:20,326 INFO L82 PathProgramCache]: Analyzing trace with hash -366042863, now seen corresponding path program 48 times [2021-02-19 17:16:20,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:20,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750437033] [2021-02-19 17:16:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:20,404 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 17:16:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750437033] [2021-02-19 17:16:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782679242] [2021-02-19 17:16:20,405 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 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 17:16:20,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:20,605 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 17:16:20,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:20,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:20,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788916520] [2021-02-19 17:16:20,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:20,606 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:21,010 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-02-19 17:16:21,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:21,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:21,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:21,011 INFO L225 Difference]: With dead ends: 175 [2021-02-19 17:16:21,011 INFO L226 Difference]: Without dead ends: 168 [2021-02-19 17:16:21,011 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:21,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-02-19 17:16:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-02-19 17:16:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-02-19 17:16:21,013 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-02-19 17:16:21,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:21,013 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-02-19 17:16:21,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-02-19 17:16:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:21,014 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:21,014 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:21,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 17:16:21,226 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -350582067, now seen corresponding path program 49 times [2021-02-19 17:16:21,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:21,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665564835] [2021-02-19 17:16:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:21,315 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 17:16:21,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665564835] [2021-02-19 17:16:21,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990867946] [2021-02-19 17:16:21,315 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:21,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:21,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:21,519 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 17:16:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:21,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656482911] [2021-02-19 17:16:21,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:21,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:21,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:21,520 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:21,880 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-02-19 17:16:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:21,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:21,881 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:16:21,881 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:16:21,881 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:16:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-02-19 17:16:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-02-19 17:16:21,883 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-02-19 17:16:21,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:21,883 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-02-19 17:16:21,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:21,883 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-02-19 17:16:21,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:21,883 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:21,883 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:22,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,090 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:22,091 INFO L82 PathProgramCache]: Analyzing trace with hash 257079881, now seen corresponding path program 50 times [2021-02-19 17:16:22,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:22,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001965193] [2021-02-19 17:16:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:22,177 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 17:16:22,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001965193] [2021-02-19 17:16:22,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944771780] [2021-02-19 17:16:22,183 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:22,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:22,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:22,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:22,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:22,373 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 17:16:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:22,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:22,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54050622] [2021-02-19 17:16:22,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:22,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:22,374 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:22,834 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-02-19 17:16:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:22,835 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:16:22,835 INFO L226 Difference]: Without dead ends: 148 [2021-02-19 17:16:22,835 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-02-19 17:16:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-02-19 17:16:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-02-19 17:16:22,837 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-02-19 17:16:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:22,837 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-02-19 17:16:22,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-02-19 17:16:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:22,838 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:22,838 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:23,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 17:16:23,038 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:23,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1432644159, now seen corresponding path program 51 times [2021-02-19 17:16:23,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:23,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335635317] [2021-02-19 17:16:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:23,143 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 17:16:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335635317] [2021-02-19 17:16:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949451176] [2021-02-19 17:16:23,143 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 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 17:16:23,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:23,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:23,382 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 17:16:23,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:23,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:23,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924415290] [2021-02-19 17:16:23,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:23,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:23,383 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:23,588 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-02-19 17:16:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:23,588 INFO L225 Difference]: With dead ends: 121 [2021-02-19 17:16:23,589 INFO L226 Difference]: Without dead ends: 114 [2021-02-19 17:16:23,589 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:23,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-02-19 17:16:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-02-19 17:16:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-02-19 17:16:23,590 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-02-19 17:16:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:23,590 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-02-19 17:16:23,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:23,590 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-02-19 17:16:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:23,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:23,590 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:23,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:23,791 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:23,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:23,791 INFO L82 PathProgramCache]: Analyzing trace with hash 646649669, now seen corresponding path program 52 times [2021-02-19 17:16:23,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:23,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430162606] [2021-02-19 17:16:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:23,893 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 17:16:23,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430162606] [2021-02-19 17:16:23,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145719364] [2021-02-19 17:16:23,894 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 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 17:16:23,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:23,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:24,078 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 17:16:24,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:24,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:24,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206921102] [2021-02-19 17:16:24,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:24,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:24,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:24,079 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:24,425 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-02-19 17:16:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:24,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:24,426 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:16:24,426 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:16:24,426 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:16:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-02-19 17:16:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-02-19 17:16:24,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-02-19 17:16:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:24,428 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-02-19 17:16:24,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-02-19 17:16:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:24,428 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:24,428 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:24,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 17:16:24,630 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash 662110465, now seen corresponding path program 53 times [2021-02-19 17:16:24,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:24,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463654980] [2021-02-19 17:16:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:24,724 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 17:16:24,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463654980] [2021-02-19 17:16:24,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417627918] [2021-02-19 17:16:24,724 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 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 17:16:24,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:24,907 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 17:16:24,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:24,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:24,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621756186] [2021-02-19 17:16:24,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:24,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:24,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:24,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:24,908 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:25,273 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-02-19 17:16:25,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:25,274 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:16:25,274 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:16:25,274 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:16:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-02-19 17:16:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-02-19 17:16:25,276 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-02-19 17:16:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:25,277 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-02-19 17:16:25,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-02-19 17:16:25,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:25,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:25,277 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:25,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 17:16:25,478 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1502146867, now seen corresponding path program 54 times [2021-02-19 17:16:25,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:25,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573474562] [2021-02-19 17:16:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:25,582 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 17:16:25,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573474562] [2021-02-19 17:16:25,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596767925] [2021-02-19 17:16:25,582 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 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 17:16:25,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:25,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:25,731 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 17:16:25,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357340123] [2021-02-19 17:16:25,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:25,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:25,732 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:25,959 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-02-19 17:16:25,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:25,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:25,960 INFO L225 Difference]: With dead ends: 155 [2021-02-19 17:16:25,960 INFO L226 Difference]: Without dead ends: 148 [2021-02-19 17:16:25,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-02-19 17:16:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-02-19 17:16:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-02-19 17:16:25,961 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-02-19 17:16:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:25,961 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-02-19 17:16:25,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-02-19 17:16:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:25,962 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:25,962 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:26,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:26,166 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1486686071, now seen corresponding path program 55 times [2021-02-19 17:16:26,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:26,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458578489] [2021-02-19 17:16:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:26,278 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 17:16:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458578489] [2021-02-19 17:16:26,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694644602] [2021-02-19 17:16:26,278 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 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 17:16:26,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:26,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:26,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:26,470 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 17:16:26,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:26,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:26,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069616783] [2021-02-19 17:16:26,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:26,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:26,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:26,471 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:26,707 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-02-19 17:16:26,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:26,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:26,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:26,708 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:16:26,708 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:16:26,708 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:16:26,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:16:26,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-02-19 17:16:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-02-19 17:16:26,721 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-02-19 17:16:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:26,721 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-02-19 17:16:26,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-02-19 17:16:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:26,722 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:26,722 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:26,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:26,943 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -915231265, now seen corresponding path program 56 times [2021-02-19 17:16:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:26,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302500303] [2021-02-19 17:16:26,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:27,023 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 17:16:27,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302500303] [2021-02-19 17:16:27,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229000986] [2021-02-19 17:16:27,024 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:27,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:27,189 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 17:16:27,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:27,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-02-19 17:16:27,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444167737] [2021-02-19 17:16:27,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 17:16:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 17:16:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-02-19 17:16:27,190 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:27,416 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-02-19 17:16:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:27,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 17:16:27,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:27,417 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:16:27,417 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:16:27,418 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:16:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-02-19 17:16:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-02-19 17:16:27,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-02-19 17:16:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:27,420 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-02-19 17:16:27,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-02-19 17:16:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:27,420 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:27,420 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:27,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,621 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash -369022379, now seen corresponding path program 57 times [2021-02-19 17:16:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:27,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221784938] [2021-02-19 17:16:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:27,717 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 17:16:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221784938] [2021-02-19 17:16:27,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923861020] [2021-02-19 17:16:27,718 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:27,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:27,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:27,919 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 17:16:27,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:27,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:27,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214846560] [2021-02-19 17:16:27,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:27,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:27,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:27,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:27,920 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:28,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:28,192 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-02-19 17:16:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:28,192 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:28,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:28,193 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:16:28,193 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:16:28,193 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:16:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-02-19 17:16:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:28,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-02-19 17:16:28,194 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-02-19 17:16:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:28,195 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-02-19 17:16:28,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-02-19 17:16:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:28,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:28,195 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:28,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:28,409 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:28,410 INFO L82 PathProgramCache]: Analyzing trace with hash -751742767, now seen corresponding path program 58 times [2021-02-19 17:16:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:28,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487093562] [2021-02-19 17:16:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:28,490 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 17:16:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487093562] [2021-02-19 17:16:28,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692940443] [2021-02-19 17:16:28,491 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 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 17:16:28,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:28,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:28,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:28,675 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 17:16:28,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:28,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:28,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897210987] [2021-02-19 17:16:28,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:28,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:28,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:28,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:28,676 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,011 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-02-19 17:16:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,012 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:16:29,012 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:16:29,012 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:29,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:16:29,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-02-19 17:16:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-02-19 17:16:29,014 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-02-19 17:16:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,014 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-02-19 17:16:29,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-02-19 17:16:29,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:29,015 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,015 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:29,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:29,226 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1327551061, now seen corresponding path program 59 times [2021-02-19 17:16:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:29,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335224070] [2021-02-19 17:16:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:29,307 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 17:16:29,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335224070] [2021-02-19 17:16:29,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14023432] [2021-02-19 17:16:29,308 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 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 17:16:29,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:29,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:29,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:29,486 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 17:16:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:29,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088297705] [2021-02-19 17:16:29,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:29,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:29,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:29,487 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:29,970 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-02-19 17:16:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:16:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:29,971 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:16:29,971 INFO L226 Difference]: Without dead ends: 183 [2021-02-19 17:16:29,972 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:16:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-02-19 17:16:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-02-19 17:16:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-02-19 17:16:29,973 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-02-19 17:16:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:29,973 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-02-19 17:16:29,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-02-19 17:16:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:29,974 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:29,974 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:30,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 17:16:30,174 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1343011857, now seen corresponding path program 60 times [2021-02-19 17:16:30,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:30,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537308931] [2021-02-19 17:16:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:30,279 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 17:16:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537308931] [2021-02-19 17:16:30,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151489417] [2021-02-19 17:16:30,279 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 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 17:16:30,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:30,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:30,475 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 17:16:30,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:30,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:30,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130910323] [2021-02-19 17:16:30,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:30,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:30,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:30,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:30,476 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:30,885 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-02-19 17:16:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:30,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:30,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:30,886 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:16:30,886 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:16:30,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:16:30,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-02-19 17:16:30,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-02-19 17:16:30,887 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-02-19 17:16:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:30,887 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-02-19 17:16:30,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-02-19 17:16:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:30,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:30,888 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-02-19 17:16:31,088 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash 260949765, now seen corresponding path program 61 times [2021-02-19 17:16:31,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135000553] [2021-02-19 17:16:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,171 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 17:16:31,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135000553] [2021-02-19 17:16:31,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145607374] [2021-02-19 17:16:31,171 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:31,351 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 17:16:31,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:31,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:31,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254781834] [2021-02-19 17:16:31,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:31,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:31,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:31,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:31,352 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:31,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:31,579 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-02-19 17:16:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:31,580 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:16:31,580 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 17:16:31,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 17:16:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-02-19 17:16:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-02-19 17:16:31,582 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-02-19 17:16:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:31,582 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-02-19 17:16:31,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-02-19 17:16:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:31,583 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:31,583 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:31,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:31,798 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1954723703, now seen corresponding path program 62 times [2021-02-19 17:16:31,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:31,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674302330] [2021-02-19 17:16:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:31,878 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 17:16:31,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674302330] [2021-02-19 17:16:31,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916483764] [2021-02-19 17:16:31,878 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 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 17:16:31,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:31,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:31,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:31,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:32,067 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 17:16:32,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431362174] [2021-02-19 17:16:32,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:32,068 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:32,438 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-02-19 17:16:32,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:16:32,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:32,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:32,439 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:16:32,439 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:16:32,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:16:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-02-19 17:16:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-02-19 17:16:32,441 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-02-19 17:16:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:32,441 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-02-19 17:16:32,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-02-19 17:16:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:32,442 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:32,442 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:32,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-02-19 17:16:32,656 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1939262907, now seen corresponding path program 63 times [2021-02-19 17:16:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257737612] [2021-02-19 17:16:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:32,743 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 17:16:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257737612] [2021-02-19 17:16:32,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979782624] [2021-02-19 17:16:32,743 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:32,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:32,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:32,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:32,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:32,928 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 17:16:32,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:32,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111836355] [2021-02-19 17:16:32,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:32,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:32,929 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:33,259 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-02-19 17:16:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:33,259 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:16:33,260 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:16:33,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:33,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:16:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-02-19 17:16:33,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-02-19 17:16:33,262 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-02-19 17:16:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:33,262 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-02-19 17:16:33,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-02-19 17:16:33,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:33,262 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:33,262 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:33,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 17:16:33,474 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:33,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash 191447057, now seen corresponding path program 64 times [2021-02-19 17:16:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114892885] [2021-02-19 17:16:33,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:33,556 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 17:16:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114892885] [2021-02-19 17:16:33,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893784662] [2021-02-19 17:16:33,557 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 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 17:16:33,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:33,720 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 17:16:33,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:33,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:33,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49502801] [2021-02-19 17:16:33,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:33,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:33,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:33,721 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:34,030 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-02-19 17:16:34,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:34,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:34,031 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:16:34,031 INFO L226 Difference]: Without dead ends: 165 [2021-02-19 17:16:34,031 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-19 17:16:34,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-02-19 17:16:34,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-02-19 17:16:34,033 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-02-19 17:16:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:34,033 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-02-19 17:16:34,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-02-19 17:16:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:34,034 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:34,034 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:34,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-02-19 17:16:34,246 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:34,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash 206907853, now seen corresponding path program 65 times [2021-02-19 17:16:34,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:34,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58062555] [2021-02-19 17:16:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:34,353 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 17:16:34,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58062555] [2021-02-19 17:16:34,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575565682] [2021-02-19 17:16:34,354 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:34,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:34,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:34,536 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 17:16:34,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:34,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:34,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256139254] [2021-02-19 17:16:34,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:34,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:34,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:34,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:34,537 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:34,806 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-02-19 17:16:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:34,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:34,807 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:16:34,807 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:16:34,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:16:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-02-19 17:16:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-02-19 17:16:34,809 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-02-19 17:16:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:34,809 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-02-19 17:16:34,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-02-19 17:16:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:34,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:34,810 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:35,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,018 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 778362659, now seen corresponding path program 66 times [2021-02-19 17:16:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837215489] [2021-02-19 17:16:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,102 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 17:16:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837215489] [2021-02-19 17:16:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594060471] [2021-02-19 17:16:35,102 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:35,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:35,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,294 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 17:16:35,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:35,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:35,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075016636] [2021-02-19 17:16:35,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:35,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:35,294 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:35,576 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-02-19 17:16:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:35,577 INFO L225 Difference]: With dead ends: 143 [2021-02-19 17:16:35,577 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:16:35,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:16:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-02-19 17:16:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-02-19 17:16:35,581 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-02-19 17:16:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:35,581 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-02-19 17:16:35,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-02-19 17:16:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:35,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:35,582 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:35,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:35,794 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1146748045, now seen corresponding path program 67 times [2021-02-19 17:16:35,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:35,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900844534] [2021-02-19 17:16:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,872 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 17:16:35,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900844534] [2021-02-19 17:16:35,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213475315] [2021-02-19 17:16:35,873 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 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 17:16:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:35,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:36,052 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 17:16:36,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:36,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:36,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280132697] [2021-02-19 17:16:36,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:36,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:36,053 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:36,219 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-02-19 17:16:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 17:16:36,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:36,220 INFO L225 Difference]: With dead ends: 111 [2021-02-19 17:16:36,220 INFO L226 Difference]: Without dead ends: 104 [2021-02-19 17:16:36,220 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:36,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-02-19 17:16:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-02-19 17:16:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-02-19 17:16:36,222 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-02-19 17:16:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:36,222 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-02-19 17:16:36,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-02-19 17:16:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:36,222 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:36,222 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:36,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:36,436 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:36,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1068925423, now seen corresponding path program 68 times [2021-02-19 17:16:36,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:36,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863129228] [2021-02-19 17:16:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:36,516 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 17:16:36,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863129228] [2021-02-19 17:16:36,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491563097] [2021-02-19 17:16:36,517 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:36,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:36,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:36,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:36,691 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 17:16:36,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:36,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:36,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474048883] [2021-02-19 17:16:36,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:36,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:36,691 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:37,043 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-02-19 17:16:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:37,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:37,044 INFO L225 Difference]: With dead ends: 144 [2021-02-19 17:16:37,044 INFO L226 Difference]: Without dead ends: 137 [2021-02-19 17:16:37,044 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-02-19 17:16:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-02-19 17:16:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:37,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-02-19 17:16:37,045 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-02-19 17:16:37,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:37,046 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-02-19 17:16:37,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:37,046 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-02-19 17:16:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:37,046 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:37,046 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:37,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 17:16:37,246 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1053464627, now seen corresponding path program 69 times [2021-02-19 17:16:37,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:37,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383685791] [2021-02-19 17:16:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:37,330 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 17:16:37,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383685791] [2021-02-19 17:16:37,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512632522] [2021-02-19 17:16:37,330 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 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 17:16:37,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:37,546 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 17:16:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:37,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595572536] [2021-02-19 17:16:37,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:37,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:37,547 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:37,806 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-02-19 17:16:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:37,807 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:16:37,807 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:16:37,807 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:16:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-02-19 17:16:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-02-19 17:16:37,808 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-02-19 17:16:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-02-19 17:16:37,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-02-19 17:16:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:37,808 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:37,809 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:38,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,009 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1077245337, now seen corresponding path program 70 times [2021-02-19 17:16:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:38,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123823020] [2021-02-19 17:16:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:38,095 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 17:16:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123823020] [2021-02-19 17:16:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947595964] [2021-02-19 17:16:38,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:16:38,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:38,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:38,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:38,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:38,269 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 17:16:38,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:38,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:38,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145483953] [2021-02-19 17:16:38,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:38,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:38,270 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:38,542 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-02-19 17:16:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:38,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:38,543 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:16:38,543 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:16:38,543 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:16:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-02-19 17:16:38,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-02-19 17:16:38,545 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-02-19 17:16:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:38,545 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-02-19 17:16:38,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-02-19 17:16:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:38,545 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:38,545 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:38,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:38,746 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:38,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:38,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1092706133, now seen corresponding path program 71 times [2021-02-19 17:16:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:38,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57989032] [2021-02-19 17:16:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:38,832 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 17:16:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57989032] [2021-02-19 17:16:38,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953792123] [2021-02-19 17:16:38,832 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 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 17:16:38,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:16:38,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:39,001 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 17:16:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:39,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:39,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808378145] [2021-02-19 17:16:39,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:39,002 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:39,240 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-02-19 17:16:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:16:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:39,241 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:16:39,241 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:16:39,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:16:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-02-19 17:16:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-02-19 17:16:39,242 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-02-19 17:16:39,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:39,243 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-02-19 17:16:39,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:39,243 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-02-19 17:16:39,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:39,243 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:39,243 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:39,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 17:16:39,462 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:39,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:39,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1664160939, now seen corresponding path program 72 times [2021-02-19 17:16:39,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:39,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642928672] [2021-02-19 17:16:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:39,547 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 17:16:39,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642928672] [2021-02-19 17:16:39,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460805104] [2021-02-19 17:16:39,547 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:39,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:39,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:39,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:39,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:39,780 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 17:16:39,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:39,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24808323] [2021-02-19 17:16:39,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:39,781 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:39,994 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-02-19 17:16:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:16:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:39,994 INFO L225 Difference]: With dead ends: 124 [2021-02-19 17:16:39,994 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 17:16:39,995 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 17:16:39,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-02-19 17:16:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-02-19 17:16:39,996 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-02-19 17:16:39,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:39,996 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-02-19 17:16:39,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:39,996 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-02-19 17:16:39,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:39,996 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:39,996 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:40,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 17:16:40,197 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash -16846251, now seen corresponding path program 73 times [2021-02-19 17:16:40,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:40,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684742481] [2021-02-19 17:16:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:40,282 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 17:16:40,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684742481] [2021-02-19 17:16:40,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796563751] [2021-02-19 17:16:40,283 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 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 17:16:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:40,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:40,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:40,461 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 17:16:40,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:40,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:40,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328834002] [2021-02-19 17:16:40,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:40,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:40,462 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:40,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:40,772 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-02-19 17:16:40,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:40,773 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:40,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:40,773 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:16:40,773 INFO L226 Difference]: Without dead ends: 150 [2021-02-19 17:16:40,774 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:16:40,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-19 17:16:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-02-19 17:16:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-02-19 17:16:40,775 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-02-19 17:16:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:40,775 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-02-19 17:16:40,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-02-19 17:16:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:40,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:40,775 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:40,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:40,976 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1385455, now seen corresponding path program 74 times [2021-02-19 17:16:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:40,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931899369] [2021-02-19 17:16:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:41,083 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 17:16:41,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931899369] [2021-02-19 17:16:41,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931599727] [2021-02-19 17:16:41,083 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 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 17:16:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:41,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:41,272 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 17:16:41,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:41,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:41,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442691106] [2021-02-19 17:16:41,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:41,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:41,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:41,273 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:41,646 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-02-19 17:16:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:41,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:41,648 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:16:41,648 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 17:16:41,648 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:16:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 17:16:41,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-02-19 17:16:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-02-19 17:16:41,650 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-02-19 17:16:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:41,650 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-02-19 17:16:41,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-02-19 17:16:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:41,650 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:41,650 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:41,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,851 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash 570069351, now seen corresponding path program 75 times [2021-02-19 17:16:41,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:41,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415248325] [2021-02-19 17:16:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:41,947 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 17:16:41,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415248325] [2021-02-19 17:16:41,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586488635] [2021-02-19 17:16:41,947 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:41,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:16:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:42,121 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 17:16:42,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:42,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:42,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153074294] [2021-02-19 17:16:42,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:42,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:42,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:42,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:42,122 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:42,457 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-02-19 17:16:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:16:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:42,457 INFO L225 Difference]: With dead ends: 141 [2021-02-19 17:16:42,457 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:16:42,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:42,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:16:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-02-19 17:16:42,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-02-19 17:16:42,459 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-02-19 17:16:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:42,459 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-02-19 17:16:42,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-02-19 17:16:42,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:42,459 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:42,459 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:42,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:42,670 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:42,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:42,670 INFO L82 PathProgramCache]: Analyzing trace with hash -590908971, now seen corresponding path program 4 times [2021-02-19 17:16:42,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:42,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628711027] [2021-02-19 17:16:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:42,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628711027] [2021-02-19 17:16:42,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058616061] [2021-02-19 17:16:42,758 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:42,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:42,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 17:16:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:42,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:42,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-02-19 17:16:42,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129599832] [2021-02-19 17:16:42,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 17:16:42,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:42,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 17:16:42,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-02-19 17:16:42,857 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17:16:43,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:43,023 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-02-19 17:16:43,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 17:16:43,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17 [2021-02-19 17:16:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:43,024 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:16:43,024 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:16:43,024 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:16:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:16:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-02-19 17:16:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-02-19 17:16:43,026 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-02-19 17:16:43,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:43,026 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-02-19 17:16:43,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 17:16:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-02-19 17:16:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 17:16:43,026 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:43,026 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:43,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:43,230 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:43,230 INFO L82 PathProgramCache]: Analyzing trace with hash 32213773, now seen corresponding path program 76 times [2021-02-19 17:16:43,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:43,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445940436] [2021-02-19 17:16:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:43,327 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 17:16:43,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445940436] [2021-02-19 17:16:43,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690800607] [2021-02-19 17:16:43,327 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:43,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:43,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 17:16:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:43,546 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 17:16:43,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:43,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-02-19 17:16:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470339697] [2021-02-19 17:16:43,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-02-19 17:16:43,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:43,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-02-19 17:16:43,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-02-19 17:16:43,547 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:43,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:43,978 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-02-19 17:16:43,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:43,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17 [2021-02-19 17:16:43,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:43,979 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:16:43,979 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:16:43,979 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:16:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-02-19 17:16:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-02-19 17:16:43,981 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-02-19 17:16:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:43,981 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-02-19 17:16:43,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 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 17:16:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-02-19 17:16:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:43,982 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:43,982 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:44,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,198 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1099902999, now seen corresponding path program 4 times [2021-02-19 17:16:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:44,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713711343] [2021-02-19 17:16:44,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713711343] [2021-02-19 17:16:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726371620] [2021-02-19 17:16:44,291 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:44,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:44,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:16:44,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:44,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:44,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 17:16:44,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922682360] [2021-02-19 17:16:44,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:16:44,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:16:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:16:44,409 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 17:16:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:44,642 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-02-19 17:16:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:16:44,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 19 [2021-02-19 17:16:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:44,643 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:16:44,643 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:16:44,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:16:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:16:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-02-19 17:16:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:44,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-02-19 17:16:44,644 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-02-19 17:16:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:44,644 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-02-19 17:16:44,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 17:16:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-02-19 17:16:44,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:44,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:44,645 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:44,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-02-19 17:16:44,858 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:44,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:44,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1170733161, now seen corresponding path program 77 times [2021-02-19 17:16:44,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:44,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14661990] [2021-02-19 17:16:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14661990] [2021-02-19 17:16:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87876820] [2021-02-19 17:16:44,977 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:44,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:44,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:44,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:44,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:45,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:45,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708437105] [2021-02-19 17:16:45,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:45,191 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:45,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:45,528 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-02-19 17:16:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:45,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:45,529 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:16:45,529 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:16:45,529 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:16:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:16:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-02-19 17:16:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-02-19 17:16:45,530 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-02-19 17:16:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:45,531 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-02-19 17:16:45,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-02-19 17:16:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:45,531 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:45,531 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:45,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:45,732 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:45,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1553453549, now seen corresponding path program 78 times [2021-02-19 17:16:45,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:45,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660963132] [2021-02-19 17:16:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660963132] [2021-02-19 17:16:45,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751106983] [2021-02-19 17:16:45,844 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:45,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:45,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:45,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:46,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:46,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838949371] [2021-02-19 17:16:46,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:46,051 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:46,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:46,405 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-02-19 17:16:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:46,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:46,406 INFO L225 Difference]: With dead ends: 141 [2021-02-19 17:16:46,406 INFO L226 Difference]: Without dead ends: 134 [2021-02-19 17:16:46,406 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-02-19 17:16:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-02-19 17:16:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-02-19 17:16:46,407 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-02-19 17:16:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:46,408 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-02-19 17:16:46,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-02-19 17:16:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:46,408 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:46,408 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:46,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-02-19 17:16:46,608 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 525840279, now seen corresponding path program 79 times [2021-02-19 17:16:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:46,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808131714] [2021-02-19 17:16:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:46,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808131714] [2021-02-19 17:16:46,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869434016] [2021-02-19 17:16:46,710 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:46,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:46,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:46,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:46,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339683737] [2021-02-19 17:16:46,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:46,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:46,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:46,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:46,909 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:47,264 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-02-19 17:16:47,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:47,265 INFO L225 Difference]: With dead ends: 167 [2021-02-19 17:16:47,265 INFO L226 Difference]: Without dead ends: 160 [2021-02-19 17:16:47,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:16:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-02-19 17:16:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-02-19 17:16:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-02-19 17:16:47,267 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-02-19 17:16:47,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:47,267 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-02-19 17:16:47,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:47,267 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-02-19 17:16:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:47,268 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:47,268 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:47,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 17:16:47,468 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 541301075, now seen corresponding path program 80 times [2021-02-19 17:16:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:47,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847895470] [2021-02-19 17:16:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:47,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847895470] [2021-02-19 17:16:47,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391236790] [2021-02-19 17:16:47,577 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:47,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:47,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:47,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:47,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:47,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:47,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814001964] [2021-02-19 17:16:47,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:47,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:47,804 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:48,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:48,264 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-02-19 17:16:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:16:48,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:48,265 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:16:48,265 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:16:48,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:48,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:16:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-02-19 17:16:48,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-02-19 17:16:48,267 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-02-19 17:16:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:48,267 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-02-19 17:16:48,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-02-19 17:16:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:48,267 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:48,267 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:48,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:48,468 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash -610263725, now seen corresponding path program 81 times [2021-02-19 17:16:48,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:48,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107923103] [2021-02-19 17:16:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:48,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107923103] [2021-02-19 17:16:48,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566606420] [2021-02-19 17:16:48,612 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:48,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:48,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:48,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:48,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:48,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:48,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:48,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084425881] [2021-02-19 17:16:48,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:48,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:48,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:48,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:48,872 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:49,240 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-02-19 17:16:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:49,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:49,241 INFO L225 Difference]: With dead ends: 158 [2021-02-19 17:16:49,241 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:16:49,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:16:49,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-02-19 17:16:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-02-19 17:16:49,243 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-02-19 17:16:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:49,244 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-02-19 17:16:49,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-02-19 17:16:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:49,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:49,244 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:49,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:49,450 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:49,450 INFO L82 PathProgramCache]: Analyzing trace with hash -594802929, now seen corresponding path program 82 times [2021-02-19 17:16:49,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:49,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381176756] [2021-02-19 17:16:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:49,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381176756] [2021-02-19 17:16:49,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450364931] [2021-02-19 17:16:49,550 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:49,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:49,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:49,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:49,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:49,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764988851] [2021-02-19 17:16:49,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:49,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:49,753 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:50,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:50,113 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-02-19 17:16:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:16:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:50,114 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:16:50,114 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:16:50,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:16:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:16:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-02-19 17:16:50,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-02-19 17:16:50,116 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-02-19 17:16:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:50,116 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-02-19 17:16:50,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-02-19 17:16:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:50,116 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:50,116 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:50,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:50,322 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash -23348123, now seen corresponding path program 83 times [2021-02-19 17:16:50,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:50,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918486067] [2021-02-19 17:16:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918486067] [2021-02-19 17:16:50,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999863844] [2021-02-19 17:16:50,454 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:50,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:50,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:50,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:50,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601440297] [2021-02-19 17:16:50,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:50,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:50,739 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:51,003 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-02-19 17:16:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:51,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:51,004 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:16:51,004 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:16:51,004 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:51,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:16:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-02-19 17:16:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-02-19 17:16:51,005 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-02-19 17:16:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:51,005 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-02-19 17:16:51,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-02-19 17:16:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:51,006 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:51,006 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:51,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,206 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1408696553, now seen corresponding path program 84 times [2021-02-19 17:16:51,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:51,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767859400] [2021-02-19 17:16:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:51,303 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 17:16:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767859400] [2021-02-19 17:16:51,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942571736] [2021-02-19 17:16:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:16:51,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:16:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:51,560 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 17:16:51,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:51,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:51,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874439747] [2021-02-19 17:16:51,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:51,561 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:51,766 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-02-19 17:16:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:16:51,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:51,767 INFO L225 Difference]: With dead ends: 125 [2021-02-19 17:16:51,767 INFO L226 Difference]: Without dead ends: 118 [2021-02-19 17:16:51,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:16:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-02-19 17:16:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-02-19 17:16:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-02-19 17:16:51,769 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-02-19 17:16:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:51,769 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-02-19 17:16:51,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-02-19 17:16:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:51,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:51,769 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:51,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:51,974 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash 345037263, now seen corresponding path program 85 times [2021-02-19 17:16:51,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:51,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741981216] [2021-02-19 17:16:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741981216] [2021-02-19 17:16:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251756858] [2021-02-19 17:16:52,101 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:52,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:52,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:52,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:52,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146015652] [2021-02-19 17:16:52,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:52,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:52,310 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:52,736 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-02-19 17:16:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:52,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:52,737 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:16:52,737 INFO L226 Difference]: Without dead ends: 130 [2021-02-19 17:16:52,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-19 17:16:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-02-19 17:16:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-02-19 17:16:52,738 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-02-19 17:16:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:52,738 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-02-19 17:16:52,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-02-19 17:16:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:52,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:52,739 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:52,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:52,954 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:52,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1870636205, now seen corresponding path program 86 times [2021-02-19 17:16:52,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:52,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998035422] [2021-02-19 17:16:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:53,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998035422] [2021-02-19 17:16:53,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095383630] [2021-02-19 17:16:53,080 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:53,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:53,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:53,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753680356] [2021-02-19 17:16:53,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:53,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:53,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:53,327 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:53,762 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-02-19 17:16:53,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:53,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:53,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:53,763 INFO L225 Difference]: With dead ends: 192 [2021-02-19 17:16:53,763 INFO L226 Difference]: Without dead ends: 185 [2021-02-19 17:16:53,763 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:16:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-02-19 17:16:53,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-02-19 17:16:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:53,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-02-19 17:16:53,766 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-02-19 17:16:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:53,766 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-02-19 17:16:53,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-02-19 17:16:53,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:53,767 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:53,767 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:53,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:53,980 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1855175409, now seen corresponding path program 87 times [2021-02-19 17:16:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:53,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571998056] [2021-02-19 17:16:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:54,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571998056] [2021-02-19 17:16:54,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061597127] [2021-02-19 17:16:54,084 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:54,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:16:54,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:54,101 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:54,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:54,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674649243] [2021-02-19 17:16:54,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:54,321 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:54,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:54,858 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-02-19 17:16:54,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:16:54,859 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:54,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:54,860 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:16:54,860 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:16:54,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:16:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:16:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-02-19 17:16:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-02-19 17:16:54,862 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-02-19 17:16:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:54,862 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-02-19 17:16:54,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-02-19 17:16:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:54,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:54,862 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:55,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:55,070 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash 275534555, now seen corresponding path program 88 times [2021-02-19 17:16:55,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:55,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090034230] [2021-02-19 17:16:55,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:55,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090034230] [2021-02-19 17:16:55,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764649736] [2021-02-19 17:16:55,209 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:16:55,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:16:55,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:55,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:55,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:55,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:55,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717661769] [2021-02-19 17:16:55,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:55,479 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:56,071 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-02-19 17:16:56,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:56,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:56,072 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:16:56,072 INFO L226 Difference]: Without dead ends: 191 [2021-02-19 17:16:56,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-19 17:16:56,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-02-19 17:16:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-02-19 17:16:56,073 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-02-19 17:16:56,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:56,074 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-02-19 17:16:56,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:56,074 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-02-19 17:16:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:56,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:56,074 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:56,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 17:16:56,274 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 290995351, now seen corresponding path program 89 times [2021-02-19 17:16:56,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:56,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551380544] [2021-02-19 17:16:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551380544] [2021-02-19 17:16:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299041691] [2021-02-19 17:16:56,381 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:56,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:16:56,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:56,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:56,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:56,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:56,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:56,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017160655] [2021-02-19 17:16:56,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:56,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:56,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:56,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:56,613 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:57,182 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-02-19 17:16:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:16:57,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:57,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:57,183 INFO L225 Difference]: With dead ends: 209 [2021-02-19 17:16:57,183 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:16:57,183 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:16:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:16:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-02-19 17:16:57,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:57,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-02-19 17:16:57,185 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-02-19 17:16:57,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:57,185 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-02-19 17:16:57,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:57,185 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-02-19 17:16:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:57,186 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:57,186 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:57,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,407 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 862450157, now seen corresponding path program 90 times [2021-02-19 17:16:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:57,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508233055] [2021-02-19 17:16:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:57,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508233055] [2021-02-19 17:16:57,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101383384] [2021-02-19 17:16:57,534 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:57,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:16:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:57,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:57,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:57,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:57,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913964487] [2021-02-19 17:16:57,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:57,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:57,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:57,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:57,812 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:58,375 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-02-19 17:16:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:16:58,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:58,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:58,376 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:16:58,376 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:16:58,376 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:16:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:16:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-02-19 17:16:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-02-19 17:16:58,378 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-02-19 17:16:58,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:58,378 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-02-19 17:16:58,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:58,378 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-02-19 17:16:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:58,379 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:58,379 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:58,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:58,600 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:58,600 INFO L82 PathProgramCache]: Analyzing trace with hash -818557033, now seen corresponding path program 91 times [2021-02-19 17:16:58,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:58,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746727828] [2021-02-19 17:16:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:58,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746727828] [2021-02-19 17:16:58,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368183841] [2021-02-19 17:16:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:58,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:16:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:58,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:16:58,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:16:58,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831613044] [2021-02-19 17:16:58,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:16:58,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:16:58,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:16:58,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:16:58,920 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:16:59,625 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-02-19 17:16:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:16:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:16:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:16:59,626 INFO L225 Difference]: With dead ends: 231 [2021-02-19 17:16:59,626 INFO L226 Difference]: Without dead ends: 224 [2021-02-19 17:16:59,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:16:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-02-19 17:16:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-02-19 17:16:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:16:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-02-19 17:16:59,628 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-02-19 17:16:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:16:59,628 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-02-19 17:16:59,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:16:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-02-19 17:16:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:16:59,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:16:59,629 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:16:59,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 17:16:59,838 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:16:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:16:59,838 INFO L82 PathProgramCache]: Analyzing trace with hash -803096237, now seen corresponding path program 92 times [2021-02-19 17:16:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:16:59,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145025321] [2021-02-19 17:16:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:16:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:16:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:16:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145025321] [2021-02-19 17:16:59,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884116857] [2021-02-19 17:16:59,951 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:16:59,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:16:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:16:59,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:16:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:00,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:00,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:00,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169814241] [2021-02-19 17:17:00,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:00,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:00,167 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:00,896 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-02-19 17:17:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:17:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:00,898 INFO L225 Difference]: With dead ends: 245 [2021-02-19 17:17:00,898 INFO L226 Difference]: Without dead ends: 238 [2021-02-19 17:17:00,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-02-19 17:17:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-02-19 17:17:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-02-19 17:17:00,900 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-02-19 17:17:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:00,903 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-02-19 17:17:00,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-02-19 17:17:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:00,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:00,903 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:01,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 17:17:01,106 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:01,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash -231641431, now seen corresponding path program 93 times [2021-02-19 17:17:01,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:01,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174483249] [2021-02-19 17:17:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174483249] [2021-02-19 17:17:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844351159] [2021-02-19 17:17:01,205 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:01,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:01,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:01,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:01,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:01,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534049228] [2021-02-19 17:17:01,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:01,461 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:02,035 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-02-19 17:17:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:17:02,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:02,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:02,037 INFO L225 Difference]: With dead ends: 193 [2021-02-19 17:17:02,037 INFO L226 Difference]: Without dead ends: 186 [2021-02-19 17:17:02,037 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:17:02,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-19 17:17:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-02-19 17:17:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-02-19 17:17:02,039 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-02-19 17:17:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:02,039 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-02-19 17:17:02,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-02-19 17:17:02,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:02,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:02,039 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:02,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 17:17:02,242 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1205774103, now seen corresponding path program 94 times [2021-02-19 17:17:02,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:02,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171264911] [2021-02-19 17:17:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:02,379 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 17:17:02,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171264911] [2021-02-19 17:17:02,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55336277] [2021-02-19 17:17:02,379 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:02,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:02,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:02,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:02,710 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 17:17:02,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:02,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:02,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925268458] [2021-02-19 17:17:02,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:02,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:02,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:02,711 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:03,071 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-02-19 17:17:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:03,072 INFO L225 Difference]: With dead ends: 142 [2021-02-19 17:17:03,072 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:17:03,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:17:03,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-02-19 17:17:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-02-19 17:17:03,074 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-02-19 17:17:03,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:03,074 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-02-19 17:17:03,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:03,074 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-02-19 17:17:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:03,074 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:03,074 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:03,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 17:17:03,275 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash 823053715, now seen corresponding path program 95 times [2021-02-19 17:17:03,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:03,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069869821] [2021-02-19 17:17:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:03,400 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 17:17:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069869821] [2021-02-19 17:17:03,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793541227] [2021-02-19 17:17:03,400 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:03,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:17:03,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:03,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:03,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:03,662 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 17:17:03,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:03,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:03,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55831006] [2021-02-19 17:17:03,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:03,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:03,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:03,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:03,663 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:03,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:03,925 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-02-19 17:17:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:03,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:03,926 INFO L225 Difference]: With dead ends: 139 [2021-02-19 17:17:03,926 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 17:17:03,926 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 17:17:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-02-19 17:17:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-02-19 17:17:03,927 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-02-19 17:17:03,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:03,927 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-02-19 17:17:03,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-02-19 17:17:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:03,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:03,928 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:04,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 17:17:04,144 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:04,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1392619753, now seen corresponding path program 96 times [2021-02-19 17:17:04,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:04,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620870525] [2021-02-19 17:17:04,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:04,247 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 17:17:04,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620870525] [2021-02-19 17:17:04,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529456265] [2021-02-19 17:17:04,247 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:04,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:17:04,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:04,510 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 17:17:04,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:04,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791842979] [2021-02-19 17:17:04,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:04,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:04,512 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:04,953 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-02-19 17:17:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:04,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:04,954 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:17:04,954 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:17:04,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:04,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:17:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-02-19 17:17:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:04,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-02-19 17:17:04,956 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-02-19 17:17:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:04,956 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-02-19 17:17:04,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-02-19 17:17:04,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:04,956 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:04,956 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:05,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 17:17:05,157 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:05,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:05,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1377158957, now seen corresponding path program 97 times [2021-02-19 17:17:05,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:05,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823506664] [2021-02-19 17:17:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:05,268 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 17:17:05,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823506664] [2021-02-19 17:17:05,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366621800] [2021-02-19 17:17:05,268 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:05,515 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 17:17:05,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:05,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:05,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235519481] [2021-02-19 17:17:05,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:05,516 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:05,799 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-02-19 17:17:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:17:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:05,800 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:17:05,800 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:17:05,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:17:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-02-19 17:17:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:05,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-02-19 17:17:05,802 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-02-19 17:17:05,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:05,802 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-02-19 17:17:05,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-02-19 17:17:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:05,802 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:05,802 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:06,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 17:17:06,003 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash -769497009, now seen corresponding path program 98 times [2021-02-19 17:17:06,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:06,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539944711] [2021-02-19 17:17:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539944711] [2021-02-19 17:17:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651020674] [2021-02-19 17:17:06,108 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:06,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:06,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:06,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:06,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:06,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479283013] [2021-02-19 17:17:06,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:06,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:06,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:06,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:06,340 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:06,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:06,766 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-02-19 17:17:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:17:06,767 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:06,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:06,767 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:17:06,767 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:17:06,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:17:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:17:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-02-19 17:17:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-02-19 17:17:06,769 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-02-19 17:17:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:06,769 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-02-19 17:17:06,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-02-19 17:17:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:06,769 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:06,769 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:06,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:06,982 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:06,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1692811693, now seen corresponding path program 99 times [2021-02-19 17:17:06,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:06,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266692724] [2021-02-19 17:17:06,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:06,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:07,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266692724] [2021-02-19 17:17:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442138261] [2021-02-19 17:17:07,128 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:17:07,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:07,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:07,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:07,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:07,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81138594] [2021-02-19 17:17:07,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:07,389 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:08,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:08,443 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-02-19 17:17:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 17:17:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:08,444 INFO L225 Difference]: With dead ends: 286 [2021-02-19 17:17:08,444 INFO L226 Difference]: Without dead ends: 279 [2021-02-19 17:17:08,444 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 17:17:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-02-19 17:17:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-02-19 17:17:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-02-19 17:17:08,447 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-02-19 17:17:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:08,447 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-02-19 17:17:08,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-02-19 17:17:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:08,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:08,447 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:08,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 17:17:08,666 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:08,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1677350897, now seen corresponding path program 100 times [2021-02-19 17:17:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:08,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165651911] [2021-02-19 17:17:08,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:08,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165651911] [2021-02-19 17:17:08,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324008870] [2021-02-19 17:17:08,807 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:08,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:08,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:08,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:08,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:09,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:09,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:09,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562361307] [2021-02-19 17:17:09,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:09,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:09,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:09,093 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:10,451 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-02-19 17:17:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 17:17:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:10,452 INFO L225 Difference]: With dead ends: 295 [2021-02-19 17:17:10,452 INFO L226 Difference]: Without dead ends: 288 [2021-02-19 17:17:10,452 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 17:17:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-02-19 17:17:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-02-19 17:17:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-02-19 17:17:10,454 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-02-19 17:17:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:10,454 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-02-19 17:17:10,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-02-19 17:17:10,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:10,454 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:10,454 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:10,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,655 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:10,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:10,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1105896091, now seen corresponding path program 101 times [2021-02-19 17:17:10,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:10,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900756064] [2021-02-19 17:17:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:10,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900756064] [2021-02-19 17:17:10,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331540414] [2021-02-19 17:17:10,782 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:10,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:17:10,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:10,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:11,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:11,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:11,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927645568] [2021-02-19 17:17:11,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:11,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:11,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:11,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:11,026 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:11,988 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-02-19 17:17:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:17:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:11,989 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:17:11,989 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:17:11,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:17:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:17:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-02-19 17:17:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-02-19 17:17:11,991 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-02-19 17:17:11,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:11,991 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-02-19 17:17:11,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:11,991 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-02-19 17:17:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:11,992 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:11,992 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:12,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 17:17:12,206 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:12,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:12,206 INFO L82 PathProgramCache]: Analyzing trace with hash 331519443, now seen corresponding path program 102 times [2021-02-19 17:17:12,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:12,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986610216] [2021-02-19 17:17:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:12,307 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 17:17:12,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986610216] [2021-02-19 17:17:12,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88799777] [2021-02-19 17:17:12,307 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:12,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:17:12,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:12,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:12,574 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 17:17:12,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:12,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:12,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347272495] [2021-02-19 17:17:12,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:12,575 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:12,835 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-02-19 17:17:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:12,836 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:17:12,836 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:17:12,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:17:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-02-19 17:17:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-02-19 17:17:12,837 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-02-19 17:17:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:12,837 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-02-19 17:17:12,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-02-19 17:17:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:12,837 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:12,837 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:13,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:13,038 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:13,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:13,038 INFO L82 PathProgramCache]: Analyzing trace with hash -51200945, now seen corresponding path program 103 times [2021-02-19 17:17:13,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:13,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708216288] [2021-02-19 17:17:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:13,178 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 17:17:13,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708216288] [2021-02-19 17:17:13,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742810501] [2021-02-19 17:17:13,178 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:13,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:13,544 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 17:17:13,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:13,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:13,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86408252] [2021-02-19 17:17:13,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:13,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:13,545 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:13,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:13,888 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-02-19 17:17:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:13,889 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:17:13,889 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:17:13,889 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:17:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-02-19 17:17:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-02-19 17:17:13,891 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-02-19 17:17:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:13,891 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-02-19 17:17:13,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-02-19 17:17:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:13,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:13,893 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:14,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 17:17:14,094 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2028092883, now seen corresponding path program 104 times [2021-02-19 17:17:14,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:14,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486896858] [2021-02-19 17:17:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:14,206 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 17:17:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486896858] [2021-02-19 17:17:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500053045] [2021-02-19 17:17:14,207 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:14,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:14,466 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 17:17:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:14,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887051359] [2021-02-19 17:17:14,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:14,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:14,467 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:14,885 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-02-19 17:17:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:14,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:14,886 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:17:14,886 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:17:14,886 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:17:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-02-19 17:17:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:14,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-02-19 17:17:14,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-02-19 17:17:14,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:14,887 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-02-19 17:17:14,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-02-19 17:17:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:14,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:14,888 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:15,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 17:17:15,090 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2043553679, now seen corresponding path program 105 times [2021-02-19 17:17:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:15,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598648042] [2021-02-19 17:17:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:15,200 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 17:17:15,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598648042] [2021-02-19 17:17:15,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560040358] [2021-02-19 17:17:15,200 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:15,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:17:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:15,465 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 17:17:15,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:15,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:15,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689386489] [2021-02-19 17:17:15,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:15,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:15,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:15,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:15,465 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:15,884 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-02-19 17:17:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:17:15,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:15,885 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:17:15,885 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:17:15,885 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:17:15,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:17:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-02-19 17:17:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-02-19 17:17:15,887 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-02-19 17:17:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:15,887 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-02-19 17:17:15,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-02-19 17:17:15,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:15,887 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:15,887 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:16,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 17:17:16,109 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1643751669, now seen corresponding path program 106 times [2021-02-19 17:17:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:16,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25910732] [2021-02-19 17:17:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:16,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25910732] [2021-02-19 17:17:16,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715378405] [2021-02-19 17:17:16,253 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 17:17:16,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:16,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:16,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:16,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:16,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:16,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:16,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:16,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111399724] [2021-02-19 17:17:16,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:16,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:16,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:16,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:16,572 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:17,414 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-02-19 17:17:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:17:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:17,415 INFO L225 Difference]: With dead ends: 236 [2021-02-19 17:17:17,415 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:17:17,415 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:17:17,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:17:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-02-19 17:17:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-02-19 17:17:17,417 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-02-19 17:17:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:17,417 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-02-19 17:17:17,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-02-19 17:17:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:17,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:17,417 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:17,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:17,618 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash 961491587, now seen corresponding path program 107 times [2021-02-19 17:17:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82853957] [2021-02-19 17:17:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:17,730 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 17:17:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82853957] [2021-02-19 17:17:17,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461726467] [2021-02-19 17:17:17,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:17,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:17:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:18,019 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 17:17:18,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:18,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:18,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431680321] [2021-02-19 17:17:18,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:18,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:18,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:18,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:18,020 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:18,235 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-02-19 17:17:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:18,236 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:17:18,236 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:17:18,236 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:17:18,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-02-19 17:17:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:18,237 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:18,237 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:18,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:18,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:18,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:18,238 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:18,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-02-19 17:17:18,438 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1254181881, now seen corresponding path program 108 times [2021-02-19 17:17:18,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:18,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091293948] [2021-02-19 17:17:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:18,546 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 17:17:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091293948] [2021-02-19 17:17:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895086406] [2021-02-19 17:17:18,546 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:18,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:18,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:18,803 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 17:17:18,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:18,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:18,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190802247] [2021-02-19 17:17:18,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:18,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:18,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:18,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:18,803 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:19,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:19,117 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-02-19 17:17:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:19,118 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:17:19,118 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:17:19,118 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:17:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-02-19 17:17:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-02-19 17:17:19,119 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-02-19 17:17:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:19,119 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-02-19 17:17:19,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-02-19 17:17:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:19,120 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:19,120 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:19,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:19,326 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:19,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:19,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1238721085, now seen corresponding path program 109 times [2021-02-19 17:17:19,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:19,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371974530] [2021-02-19 17:17:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:19,438 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 17:17:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371974530] [2021-02-19 17:17:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636086406] [2021-02-19 17:17:19,438 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:19,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:19,727 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 17:17:19,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:19,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900773135] [2021-02-19 17:17:19,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:19,728 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:20,086 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-02-19 17:17:20,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:17:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:20,087 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:17:20,087 INFO L226 Difference]: Without dead ends: 130 [2021-02-19 17:17:20,087 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:17:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-19 17:17:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-02-19 17:17:20,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-02-19 17:17:20,089 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-02-19 17:17:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:20,089 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-02-19 17:17:20,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-02-19 17:17:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:20,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:20,089 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:20,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:20,302 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:20,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:20,302 INFO L82 PathProgramCache]: Analyzing trace with hash 891988879, now seen corresponding path program 110 times [2021-02-19 17:17:20,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:20,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457634273] [2021-02-19 17:17:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:20,412 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 17:17:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457634273] [2021-02-19 17:17:20,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369152873] [2021-02-19 17:17:20,412 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:20,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:20,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:20,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:20,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:20,690 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 17:17:20,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:20,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632711073] [2021-02-19 17:17:20,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:20,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:20,690 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:20,976 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-02-19 17:17:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:20,977 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:17:20,977 INFO L226 Difference]: Without dead ends: 138 [2021-02-19 17:17:20,977 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:20,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-19 17:17:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-02-19 17:17:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-02-19 17:17:20,978 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-02-19 17:17:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:20,978 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-02-19 17:17:20,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-02-19 17:17:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:20,979 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:20,979 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:21,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 17:17:21,182 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 907449675, now seen corresponding path program 111 times [2021-02-19 17:17:21,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:21,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122641300] [2021-02-19 17:17:21,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:21,307 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 17:17:21,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122641300] [2021-02-19 17:17:21,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264427733] [2021-02-19 17:17:21,307 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:21,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:21,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:21,563 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 17:17:21,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:21,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:21,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943343397] [2021-02-19 17:17:21,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:21,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:21,564 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:21,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:21,793 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-02-19 17:17:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:21,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:21,794 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:17:21,794 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:17:21,794 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:17:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-02-19 17:17:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:21,795 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:21,795 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:21,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:21,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:21,795 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:21,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:21,996 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:21,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:21,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1478904481, now seen corresponding path program 112 times [2021-02-19 17:17:21,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:21,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151643413] [2021-02-19 17:17:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:21,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:22,117 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 17:17:22,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151643413] [2021-02-19 17:17:22,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019650153] [2021-02-19 17:17:22,117 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:22,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:22,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:22,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:22,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:22,427 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 17:17:22,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:22,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:22,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650823307] [2021-02-19 17:17:22,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:22,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:22,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:22,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:22,428 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:22,638 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-02-19 17:17:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:22,639 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:17:22,639 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:17:22,639 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:17:22,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-02-19 17:17:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:22,640 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:22,640 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:22,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:22,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:22,641 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:22,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:22,841 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:22,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2025113367, now seen corresponding path program 113 times [2021-02-19 17:17:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:22,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693510491] [2021-02-19 17:17:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:22,940 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 17:17:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693510491] [2021-02-19 17:17:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518710202] [2021-02-19 17:17:22,940 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:22,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 17:17:22,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:22,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:22,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:23,212 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 17:17:23,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:23,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:23,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123338931] [2021-02-19 17:17:23,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:23,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:23,213 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:23,599 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-02-19 17:17:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:23,600 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:17:23,600 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:17:23,600 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:17:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-02-19 17:17:23,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:23,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:23,601 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:23,601 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:23,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:23,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:23,602 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:23,602 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:23,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,802 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:23,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:23,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1642392979, now seen corresponding path program 114 times [2021-02-19 17:17:23,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:23,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577351225] [2021-02-19 17:17:23,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:23,915 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 17:17:23,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577351225] [2021-02-19 17:17:23,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044892782] [2021-02-19 17:17:23,915 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:23,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:17:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:23,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:24,182 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 17:17:24,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:24,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:24,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102396130] [2021-02-19 17:17:24,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:24,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:24,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:24,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:24,183 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:24,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:24,440 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-02-19 17:17:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:24,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:24,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:24,441 INFO L225 Difference]: With dead ends: 142 [2021-02-19 17:17:24,441 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:17:24,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:17:24,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-02-19 17:17:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-02-19 17:17:24,443 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-02-19 17:17:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:24,443 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-02-19 17:17:24,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-02-19 17:17:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:24,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:24,443 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:24,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:24,646 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash -573280489, now seen corresponding path program 115 times [2021-02-19 17:17:24,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:24,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593233707] [2021-02-19 17:17:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:24,819 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 17:17:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593233707] [2021-02-19 17:17:24,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741311350] [2021-02-19 17:17:24,820 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:24,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:25,195 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 17:17:25,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:25,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:25,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880266590] [2021-02-19 17:17:25,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:25,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:25,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:25,196 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:25,533 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-02-19 17:17:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:25,534 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:17:25,534 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:17:25,534 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:17:25,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-02-19 17:17:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:25,535 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:25,535 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:25,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:25,535 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:25,535 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:25,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 17:17:25,736 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash -557819693, now seen corresponding path program 116 times [2021-02-19 17:17:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:25,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7831343] [2021-02-19 17:17:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:25,864 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 17:17:25,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7831343] [2021-02-19 17:17:25,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807361107] [2021-02-19 17:17:25,865 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:25,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:25,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:26,132 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 17:17:26,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:26,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:26,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425671739] [2021-02-19 17:17:26,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:26,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:26,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:26,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:26,133 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:26,500 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-02-19 17:17:26,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:26,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:26,501 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:17:26,501 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:17:26,501 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:17:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-02-19 17:17:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-02-19 17:17:26,502 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-02-19 17:17:26,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:26,502 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-02-19 17:17:26,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:26,502 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-02-19 17:17:26,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:26,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:26,502 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:26,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-02-19 17:17:26,703 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:26,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:26,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1639881785, now seen corresponding path program 117 times [2021-02-19 17:17:26,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:26,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90078769] [2021-02-19 17:17:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:26,817 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 17:17:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90078769] [2021-02-19 17:17:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950807204] [2021-02-19 17:17:26,818 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:26,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:26,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:26,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:27,112 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 17:17:27,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:27,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:27,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741542047] [2021-02-19 17:17:27,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:27,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:27,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:27,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:27,113 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:27,377 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-02-19 17:17:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:27,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:27,378 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:17:27,378 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 17:17:27,378 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 17:17:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-02-19 17:17:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-02-19 17:17:27,379 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-02-19 17:17:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:27,380 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-02-19 17:17:27,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-02-19 17:17:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:27,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:27,380 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:27,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 17:17:27,582 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:27,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:27,582 INFO L82 PathProgramCache]: Analyzing trace with hash 439412043, now seen corresponding path program 118 times [2021-02-19 17:17:27,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:27,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434701790] [2021-02-19 17:17:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:27,699 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 17:17:27,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434701790] [2021-02-19 17:17:27,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163478478] [2021-02-19 17:17:27,700 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:27,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:27,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:27,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:27,985 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 17:17:27,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:27,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:27,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498171615] [2021-02-19 17:17:27,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:27,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:27,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:27,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:27,986 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:28,285 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-02-19 17:17:28,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:28,286 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:17:28,286 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:17:28,286 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:28,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:17:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-02-19 17:17:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:28,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-02-19 17:17:28,287 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-02-19 17:17:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:28,288 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-02-19 17:17:28,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-02-19 17:17:28,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:28,288 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:28,288 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:28,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:28,490 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:28,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:28,490 INFO L82 PathProgramCache]: Analyzing trace with hash 454872839, now seen corresponding path program 119 times [2021-02-19 17:17:28,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:28,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041961850] [2021-02-19 17:17:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:28,604 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 17:17:28,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041961850] [2021-02-19 17:17:28,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015976853] [2021-02-19 17:17:28,605 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:28,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:17:28,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:28,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:28,898 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 17:17:28,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:28,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:28,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500575326] [2021-02-19 17:17:28,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:28,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:28,899 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:29,278 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-02-19 17:17:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:29,280 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:17:29,280 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:17:29,281 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:17:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-02-19 17:17:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-02-19 17:17:29,283 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-02-19 17:17:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:29,283 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-02-19 17:17:29,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-02-19 17:17:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:29,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:29,283 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:29,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 17:17:29,505 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1709384493, now seen corresponding path program 120 times [2021-02-19 17:17:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:29,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454986584] [2021-02-19 17:17:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:29,625 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 17:17:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454986584] [2021-02-19 17:17:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814416716] [2021-02-19 17:17:29,626 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:29,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:29,928 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 17:17:29,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:29,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499627011] [2021-02-19 17:17:29,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:29,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:29,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:29,929 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:30,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:30,225 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-02-19 17:17:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:30,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:30,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:30,226 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:17:30,226 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:17:30,226 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:17:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-02-19 17:17:30,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-02-19 17:17:30,228 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-02-19 17:17:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:30,228 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-02-19 17:17:30,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-02-19 17:17:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:30,228 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:30,228 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:30,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-02-19 17:17:30,442 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1693923697, now seen corresponding path program 121 times [2021-02-19 17:17:30,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:30,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689894583] [2021-02-19 17:17:30,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:30,601 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 17:17:30,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689894583] [2021-02-19 17:17:30,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367413336] [2021-02-19 17:17:30,602 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:30,978 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 17:17:30,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:30,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:30,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581292442] [2021-02-19 17:17:30,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:30,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:30,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:30,979 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:31,411 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-02-19 17:17:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:31,412 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:17:31,412 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:17:31,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:31,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:17:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-02-19 17:17:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-02-19 17:17:31,413 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-02-19 17:17:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:31,413 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-02-19 17:17:31,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-02-19 17:17:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:31,414 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:31,414 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:31,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 17:17:31,626 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1122468891, now seen corresponding path program 122 times [2021-02-19 17:17:31,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:31,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78268077] [2021-02-19 17:17:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:31,726 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 17:17:31,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78268077] [2021-02-19 17:17:31,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229079114] [2021-02-19 17:17:31,726 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:31,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:31,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:31,985 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 17:17:31,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:31,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:31,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102248333] [2021-02-19 17:17:31,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:31,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:31,986 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:32,309 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-02-19 17:17:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:32,310 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:17:32,310 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 17:17:32,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 17:17:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-02-19 17:17:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-02-19 17:17:32,311 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-02-19 17:17:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:32,311 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-02-19 17:17:32,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-02-19 17:17:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:32,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:32,312 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:32,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:32,512 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash -754083505, now seen corresponding path program 123 times [2021-02-19 17:17:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:32,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159646598] [2021-02-19 17:17:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:32,628 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 17:17:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159646598] [2021-02-19 17:17:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888450841] [2021-02-19 17:17:32,628 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:32,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:32,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:32,937 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 17:17:32,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:32,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751395856] [2021-02-19 17:17:32,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:32,938 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:33,178 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-02-19 17:17:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:33,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:33,179 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:17:33,179 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:17:33,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:17:33,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-02-19 17:17:33,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-02-19 17:17:33,181 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-02-19 17:17:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:33,181 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-02-19 17:17:33,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-02-19 17:17:33,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:33,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:33,181 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:33,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:33,381 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1325210323, now seen corresponding path program 124 times [2021-02-19 17:17:33,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:33,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217341282] [2021-02-19 17:17:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:33,489 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 17:17:33,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217341282] [2021-02-19 17:17:33,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599832995] [2021-02-19 17:17:33,490 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:33,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:33,762 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 17:17:33,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:33,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:33,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451788199] [2021-02-19 17:17:33,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:33,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:33,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:33,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:33,763 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:34,095 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-02-19 17:17:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:34,096 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:17:34,096 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:17:34,096 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:17:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-02-19 17:17:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:34,097 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:34,098 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:34,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:34,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:34,098 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:34,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-02-19 17:17:34,298 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1340671119, now seen corresponding path program 125 times [2021-02-19 17:17:34,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:34,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458056217] [2021-02-19 17:17:34,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:34,421 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 17:17:34,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458056217] [2021-02-19 17:17:34,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965518453] [2021-02-19 17:17:34,422 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:34,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:17:34,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:34,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:34,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:34,718 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 17:17:34,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:34,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:34,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020316079] [2021-02-19 17:17:34,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:34,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:34,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:34,719 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:35,122 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-02-19 17:17:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:35,123 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:17:35,123 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:17:35,123 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:17:35,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-02-19 17:17:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:35,125 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:35,125 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:35,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:35,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:35,125 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:35,125 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:35,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 17:17:35,338 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:35,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:35,338 INFO L82 PathProgramCache]: Analyzing trace with hash -823586213, now seen corresponding path program 126 times [2021-02-19 17:17:35,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:35,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128215827] [2021-02-19 17:17:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:35,457 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 17:17:35,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128215827] [2021-02-19 17:17:35,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717946488] [2021-02-19 17:17:35,457 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:35,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:35,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:35,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:35,736 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 17:17:35,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:35,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:35,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379879334] [2021-02-19 17:17:35,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:35,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:35,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:35,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:35,737 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:36,089 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-02-19 17:17:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:36,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:36,090 INFO L225 Difference]: With dead ends: 148 [2021-02-19 17:17:36,090 INFO L226 Difference]: Without dead ends: 141 [2021-02-19 17:17:36,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-19 17:17:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-02-19 17:17:36,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:36,092 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:36,092 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:36,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:36,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:36,092 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:36,092 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:36,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-02-19 17:17:36,292 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:36,293 INFO L82 PathProgramCache]: Analyzing trace with hash -808125417, now seen corresponding path program 127 times [2021-02-19 17:17:36,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:36,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54071349] [2021-02-19 17:17:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:36,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:36,419 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 17:17:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54071349] [2021-02-19 17:17:36,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642262640] [2021-02-19 17:17:36,419 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:36,720 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 17:17:36,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:36,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:36,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935809421] [2021-02-19 17:17:36,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:36,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:36,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:36,720 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:37,096 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-02-19 17:17:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:37,097 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:17:37,097 INFO L226 Difference]: Without dead ends: 147 [2021-02-19 17:17:37,097 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-19 17:17:37,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-02-19 17:17:37,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-02-19 17:17:37,099 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-02-19 17:17:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:37,099 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-02-19 17:17:37,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-02-19 17:17:37,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:37,099 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:37,099 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:37,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 17:17:37,299 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:37,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:37,300 INFO L82 PathProgramCache]: Analyzing trace with hash -236670611, now seen corresponding path program 128 times [2021-02-19 17:17:37,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:37,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176347101] [2021-02-19 17:17:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:37,418 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 17:17:37,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176347101] [2021-02-19 17:17:37,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143937830] [2021-02-19 17:17:37,418 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:37,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:37,726 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 17:17:37,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:37,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:37,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651712828] [2021-02-19 17:17:37,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:37,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:37,727 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:38,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:38,044 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-02-19 17:17:38,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:38,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:38,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:38,045 INFO L225 Difference]: With dead ends: 131 [2021-02-19 17:17:38,045 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 17:17:38,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 17:17:38,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-02-19 17:17:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-02-19 17:17:38,047 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-02-19 17:17:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:38,047 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-02-19 17:17:38,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-02-19 17:17:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:38,048 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:38,048 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:38,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 17:17:38,248 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:38,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1917677801, now seen corresponding path program 129 times [2021-02-19 17:17:38,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:38,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760726035] [2021-02-19 17:17:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:38,360 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 17:17:38,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760726035] [2021-02-19 17:17:38,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549408487] [2021-02-19 17:17:38,360 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:38,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:38,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:38,663 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 17:17:38,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:38,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:38,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706373034] [2021-02-19 17:17:38,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:38,664 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:39,028 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-02-19 17:17:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:39,029 INFO L225 Difference]: With dead ends: 165 [2021-02-19 17:17:39,029 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:17:39,029 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:17:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-02-19 17:17:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-02-19 17:17:39,030 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-02-19 17:17:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:39,030 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-02-19 17:17:39,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-02-19 17:17:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:39,031 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:39,031 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:39,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 17:17:39,231 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:39,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:39,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1902217005, now seen corresponding path program 130 times [2021-02-19 17:17:39,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:39,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540933445] [2021-02-19 17:17:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:39,368 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 17:17:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540933445] [2021-02-19 17:17:39,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030620206] [2021-02-19 17:17:39,369 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:39,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:39,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:39,687 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 17:17:39,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:39,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:39,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630924919] [2021-02-19 17:17:39,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:39,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:39,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:39,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:39,688 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:40,185 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-02-19 17:17:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:40,186 INFO L225 Difference]: With dead ends: 171 [2021-02-19 17:17:40,186 INFO L226 Difference]: Without dead ends: 164 [2021-02-19 17:17:40,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-02-19 17:17:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-02-19 17:17:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-02-19 17:17:40,187 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-02-19 17:17:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:40,187 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-02-19 17:17:40,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-02-19 17:17:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:40,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:40,188 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:40,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-02-19 17:17:40,388 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1330762199, now seen corresponding path program 131 times [2021-02-19 17:17:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:40,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091465793] [2021-02-19 17:17:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:40,493 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 17:17:40,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091465793] [2021-02-19 17:17:40,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129164202] [2021-02-19 17:17:40,493 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:40,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:17:40,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:40,752 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 17:17:40,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:40,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:40,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364205739] [2021-02-19 17:17:40,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:40,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:40,753 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:41,108 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-02-19 17:17:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:41,109 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:17:41,109 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:17:41,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:17:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-02-19 17:17:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-02-19 17:17:41,111 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-02-19 17:17:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:41,111 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-02-19 17:17:41,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-02-19 17:17:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:41,111 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:41,112 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:41,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-02-19 17:17:41,326 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:41,326 INFO L82 PathProgramCache]: Analyzing trace with hash 106653335, now seen corresponding path program 132 times [2021-02-19 17:17:41,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:41,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453075325] [2021-02-19 17:17:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453075325] [2021-02-19 17:17:41,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478183784] [2021-02-19 17:17:41,444 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:41,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:17:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:41,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:41,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:41,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-02-19 17:17:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90076379] [2021-02-19 17:17:41,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:17:41,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:17:41,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:41,758 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:42,627 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-02-19 17:17:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:17:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-02-19 17:17:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:42,628 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:17:42,628 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:17:42,629 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:17:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:17:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-02-19 17:17:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-02-19 17:17:42,630 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-02-19 17:17:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:42,630 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-02-19 17:17:42,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-02-19 17:17:42,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:42,630 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:42,630 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:42,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:42,831 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:42,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:42,831 INFO L82 PathProgramCache]: Analyzing trace with hash -276067053, now seen corresponding path program 133 times [2021-02-19 17:17:42,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:42,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234841635] [2021-02-19 17:17:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234841635] [2021-02-19 17:17:42,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589741054] [2021-02-19 17:17:42,929 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:42,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:42,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:43,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:43,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-02-19 17:17:43,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758347386] [2021-02-19 17:17:43,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:17:43,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:43,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:17:43,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:43,249 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:43,855 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-02-19 17:17:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:17:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-02-19 17:17:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:43,856 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:17:43,856 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:17:43,856 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:17:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:17:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-02-19 17:17:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-02-19 17:17:43,857 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-02-19 17:17:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:43,857 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-02-19 17:17:43,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-02-19 17:17:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:43,858 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:43,858 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:44,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:44,058 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1803226775, now seen corresponding path program 134 times [2021-02-19 17:17:44,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:44,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858373065] [2021-02-19 17:17:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:44,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858373065] [2021-02-19 17:17:44,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90565605] [2021-02-19 17:17:44,178 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:44,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:44,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:44,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:44,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-02-19 17:17:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148022065] [2021-02-19 17:17:44,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:17:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:17:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:44,503 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:45,662 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-02-19 17:17:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 17:17:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-02-19 17:17:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:45,663 INFO L225 Difference]: With dead ends: 223 [2021-02-19 17:17:45,663 INFO L226 Difference]: Without dead ends: 216 [2021-02-19 17:17:45,663 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 17:17:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-02-19 17:17:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-02-19 17:17:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:45,664 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:45,665 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:45,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:45,665 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:45,665 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:45,665 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:45,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:45,865 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:45,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1818687571, now seen corresponding path program 135 times [2021-02-19 17:17:45,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:45,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042918168] [2021-02-19 17:17:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:45,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042918168] [2021-02-19 17:17:45,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502820692] [2021-02-19 17:17:45,996 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:46,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:17:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:46,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:46,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:46,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-02-19 17:17:46,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231986899] [2021-02-19 17:17:46,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 17:17:46,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:46,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 17:17:46,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-19 17:17:46,444 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:47,724 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-02-19 17:17:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 17:17:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 19 [2021-02-19 17:17:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:47,725 INFO L225 Difference]: With dead ends: 214 [2021-02-19 17:17:47,725 INFO L226 Difference]: Without dead ends: 207 [2021-02-19 17:17:47,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 17:17:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-02-19 17:17:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-02-19 17:17:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:47,727 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:47,727 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 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 17:17:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:47,727 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:47,727 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:47,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:47,928 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1868617777, now seen corresponding path program 136 times [2021-02-19 17:17:47,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:47,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052667461] [2021-02-19 17:17:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:48,050 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 17:17:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052667461] [2021-02-19 17:17:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479002163] [2021-02-19 17:17:48,050 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:48,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:48,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:48,341 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 17:17:48,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:48,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:48,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033794783] [2021-02-19 17:17:48,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:48,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:48,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:48,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:48,341 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:48,588 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-02-19 17:17:48,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:48,589 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:17:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:48,590 INFO L225 Difference]: With dead ends: 137 [2021-02-19 17:17:48,590 INFO L226 Difference]: Without dead ends: 130 [2021-02-19 17:17:48,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-02-19 17:17:48,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-02-19 17:17:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-02-19 17:17:48,591 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-02-19 17:17:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:48,591 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-02-19 17:17:48,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:17:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-02-19 17:17:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:48,591 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:48,591 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:48,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-02-19 17:17:48,794 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1655643987, now seen corresponding path program 137 times [2021-02-19 17:17:48,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:48,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044552571] [2021-02-19 17:17:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044552571] [2021-02-19 17:17:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164614301] [2021-02-19 17:17:48,930 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:48,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:17:48,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:48,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:49,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:49,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:17:49,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268607896] [2021-02-19 17:17:49,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:49,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:49,202 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:50,377 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-02-19 17:17:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:17:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:17:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:50,378 INFO L225 Difference]: With dead ends: 235 [2021-02-19 17:17:50,378 INFO L226 Difference]: Without dead ends: 228 [2021-02-19 17:17:50,379 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:17:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-02-19 17:17:50,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-02-19 17:17:50,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:50,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-02-19 17:17:50,380 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-02-19 17:17:50,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:50,380 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-02-19 17:17:50,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-02-19 17:17:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:50,380 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:50,380 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:50,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-02-19 17:17:50,581 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1671104783, now seen corresponding path program 138 times [2021-02-19 17:17:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:50,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824637760] [2021-02-19 17:17:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:50,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824637760] [2021-02-19 17:17:50,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372774413] [2021-02-19 17:17:50,718 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:50,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:17:50,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:50,737 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:50,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:50,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:17:50,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542413481] [2021-02-19 17:17:50,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:50,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:50,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:50,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:50,987 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:51,896 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-02-19 17:17:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:17:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:17:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:51,897 INFO L225 Difference]: With dead ends: 235 [2021-02-19 17:17:51,897 INFO L226 Difference]: Without dead ends: 228 [2021-02-19 17:17:51,897 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:17:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-02-19 17:17:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-02-19 17:17:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:51,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-02-19 17:17:51,899 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-02-19 17:17:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:51,899 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-02-19 17:17:51,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-02-19 17:17:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:51,899 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:51,900 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:52,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-02-19 17:17:52,114 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:52,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2052407707, now seen corresponding path program 139 times [2021-02-19 17:17:52,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:52,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657972383] [2021-02-19 17:17:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657972383] [2021-02-19 17:17:52,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870511889] [2021-02-19 17:17:52,243 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:52,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:52,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:52,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:17:52,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003838983] [2021-02-19 17:17:52,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:52,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:52,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:52,530 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:53,610 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-02-19 17:17:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 17:17:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:17:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:53,612 INFO L225 Difference]: With dead ends: 201 [2021-02-19 17:17:53,612 INFO L226 Difference]: Without dead ends: 194 [2021-02-19 17:17:53,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:17:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-02-19 17:17:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-02-19 17:17:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:53,614 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:53,615 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:53,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:53,615 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:53,615 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:53,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-02-19 17:17:53,816 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:53,816 INFO L82 PathProgramCache]: Analyzing trace with hash -614992173, now seen corresponding path program 140 times [2021-02-19 17:17:53,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:53,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770169594] [2021-02-19 17:17:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:53,946 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 17:17:53,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770169594] [2021-02-19 17:17:53,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637937985] [2021-02-19 17:17:53,947 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:53,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:17:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:53,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:54,289 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 17:17:54,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:54,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636960375] [2021-02-19 17:17:54,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:54,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:54,290 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:54,709 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-02-19 17:17:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:54,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:17:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:54,711 INFO L225 Difference]: With dead ends: 157 [2021-02-19 17:17:54,711 INFO L226 Difference]: Without dead ends: 150 [2021-02-19 17:17:54,711 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-02-19 17:17:54,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-02-19 17:17:54,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:54,712 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:54,712 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:54,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:54,712 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:54,712 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:54,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-02-19 17:17:54,913 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash -997712561, now seen corresponding path program 141 times [2021-02-19 17:17:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:54,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625521371] [2021-02-19 17:17:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:55,028 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 17:17:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625521371] [2021-02-19 17:17:55,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712521720] [2021-02-19 17:17:55,029 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:55,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:17:55,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:55,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:55,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:55,305 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 17:17:55,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:55,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:55,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114855767] [2021-02-19 17:17:55,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:55,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:55,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:55,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:55,306 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:55,554 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-02-19 17:17:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:17:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:17:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:55,555 INFO L225 Difference]: With dead ends: 161 [2021-02-19 17:17:55,555 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:17:55,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:17:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:17:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-02-19 17:17:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-02-19 17:17:55,556 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-02-19 17:17:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:55,556 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-02-19 17:17:55,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-02-19 17:17:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:55,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:55,557 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:55,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-02-19 17:17:55,762 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1081581267, now seen corresponding path program 142 times [2021-02-19 17:17:55,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:55,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867632890] [2021-02-19 17:17:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:55,873 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 17:17:55,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867632890] [2021-02-19 17:17:55,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733421298] [2021-02-19 17:17:55,874 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:55,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:17:55,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:55,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:56,231 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 17:17:56,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:56,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384539424] [2021-02-19 17:17:56,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:56,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:56,232 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:56,817 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-02-19 17:17:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:17:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:56,819 INFO L225 Difference]: With dead ends: 183 [2021-02-19 17:17:56,819 INFO L226 Difference]: Without dead ends: 176 [2021-02-19 17:17:56,819 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-02-19 17:17:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-02-19 17:17:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-02-19 17:17:56,820 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-02-19 17:17:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:56,820 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-02-19 17:17:56,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-02-19 17:17:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:56,820 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:56,820 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:57,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:57,021 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1097042063, now seen corresponding path program 143 times [2021-02-19 17:17:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262904804] [2021-02-19 17:17:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:57,164 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 17:17:57,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262904804] [2021-02-19 17:17:57,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988663972] [2021-02-19 17:17:57,164 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:57,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:17:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:57,501 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 17:17:57,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:57,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:17:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511536475] [2021-02-19 17:17:57,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:17:57,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:57,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:17:57,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:17:57,502 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:57,921 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-02-19 17:17:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:17:57,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:17:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:57,923 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:17:57,923 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:17:57,923 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:17:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:17:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-02-19 17:17:57,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:17:57,924 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:17:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:57,924 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:17:57,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:17:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:17:57,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:57,925 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:57,925 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:58,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:58,125 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1704704011, now seen corresponding path program 144 times [2021-02-19 17:17:58,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:58,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371545861] [2021-02-19 17:17:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371545861] [2021-02-19 17:17:58,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707938298] [2021-02-19 17:17:58,236 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:58,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:17:58,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:17:58,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:17:58,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:17:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:17:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:17:58,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:17:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59276241] [2021-02-19 17:17:58,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:17:58,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:17:58,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:17:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:17:58,486 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:17:59,444 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-02-19 17:17:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 17:17:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:17:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:17:59,445 INFO L225 Difference]: With dead ends: 215 [2021-02-19 17:17:59,445 INFO L226 Difference]: Without dead ends: 138 [2021-02-19 17:17:59,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:17:59,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-19 17:17:59,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-02-19 17:17:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:17:59,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-02-19 17:17:59,446 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-02-19 17:17:59,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:17:59,446 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-02-19 17:17:59,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:17:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-02-19 17:17:59,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:17:59,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:17:59,447 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:17:59,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:59,647 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:17:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:17:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash 14979971, now seen corresponding path program 145 times [2021-02-19 17:17:59,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:17:59,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561875966] [2021-02-19 17:17:59,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:17:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:59,785 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 17:17:59,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561875966] [2021-02-19 17:17:59,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201169887] [2021-02-19 17:17:59,786 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:17:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:17:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:17:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:00,165 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 17:18:00,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:00,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:00,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770907817] [2021-02-19 17:18:00,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:00,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:00,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:00,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:00,166 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:00,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:00,559 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-02-19 17:18:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:00,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:00,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:00,561 INFO L225 Difference]: With dead ends: 126 [2021-02-19 17:18:00,561 INFO L226 Difference]: Without dead ends: 119 [2021-02-19 17:18:00,561 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-02-19 17:18:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-02-19 17:18:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-02-19 17:18:00,562 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-02-19 17:18:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:00,562 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-02-19 17:18:00,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-02-19 17:18:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:00,562 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:00,562 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:00,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,763 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2094273799, now seen corresponding path program 146 times [2021-02-19 17:18:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029681741] [2021-02-19 17:18:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:00,908 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 17:18:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029681741] [2021-02-19 17:18:00,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742568010] [2021-02-19 17:18:00,909 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:00,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:00,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:00,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:00,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:01,247 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 17:18:01,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:01,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:01,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620742520] [2021-02-19 17:18:01,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:01,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:01,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:01,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:01,248 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:01,637 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-02-19 17:18:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:01,638 INFO L225 Difference]: With dead ends: 149 [2021-02-19 17:18:01,638 INFO L226 Difference]: Without dead ends: 142 [2021-02-19 17:18:01,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-02-19 17:18:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-02-19 17:18:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 17:18:01,639 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-02-19 17:18:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:01,639 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 17:18:01,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 17:18:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:01,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:01,639 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:01,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:01,840 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2109734595, now seen corresponding path program 147 times [2021-02-19 17:18:01,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:01,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829073955] [2021-02-19 17:18:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:01,956 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 17:18:01,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829073955] [2021-02-19 17:18:01,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049667114] [2021-02-19 17:18:01,957 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:01,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:18:01,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:01,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:01,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:02,260 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 17:18:02,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:02,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:02,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126183361] [2021-02-19 17:18:02,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:02,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:02,261 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:02,701 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-02-19 17:18:02,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:02,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:02,703 INFO L225 Difference]: With dead ends: 136 [2021-02-19 17:18:02,703 INFO L226 Difference]: Without dead ends: 129 [2021-02-19 17:18:02,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-02-19 17:18:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-02-19 17:18:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:02,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-02-19 17:18:02,704 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-02-19 17:18:02,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:02,704 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-02-19 17:18:02,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-02-19 17:18:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:02,704 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:02,704 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:02,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:02,905 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:02,905 INFO L82 PathProgramCache]: Analyzing trace with hash -54522737, now seen corresponding path program 148 times [2021-02-19 17:18:02,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:02,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317838275] [2021-02-19 17:18:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:03,042 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 17:18:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317838275] [2021-02-19 17:18:03,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817491393] [2021-02-19 17:18:03,042 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:03,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:03,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:03,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:03,402 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 17:18:03,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:03,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:03,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209460067] [2021-02-19 17:18:03,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:03,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:03,403 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:03,869 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-02-19 17:18:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:03,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:03,870 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:18:03,870 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 17:18:03,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 17:18:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-02-19 17:18:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 17:18:03,871 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-02-19 17:18:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:03,872 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 17:18:03,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 17:18:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:03,872 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:03,872 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:04,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 17:18:04,086 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:04,086 INFO L82 PathProgramCache]: Analyzing trace with hash -39061941, now seen corresponding path program 149 times [2021-02-19 17:18:04,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:04,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952834993] [2021-02-19 17:18:04,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:04,209 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 17:18:04,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952834993] [2021-02-19 17:18:04,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17339768] [2021-02-19 17:18:04,209 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:04,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:18:04,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:04,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:04,517 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 17:18:04,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:04,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:04,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510597896] [2021-02-19 17:18:04,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:04,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:04,518 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:04,838 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-02-19 17:18:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:04,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:04,839 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:18:04,839 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:18:04,839 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:18:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-02-19 17:18:04,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-02-19 17:18:04,840 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-02-19 17:18:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:04,841 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-02-19 17:18:04,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-02-19 17:18:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:04,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:04,841 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:05,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 17:18:05,041 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash 532392865, now seen corresponding path program 150 times [2021-02-19 17:18:05,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:05,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011310222] [2021-02-19 17:18:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:05,194 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 17:18:05,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011310222] [2021-02-19 17:18:05,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327378775] [2021-02-19 17:18:05,194 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:05,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:05,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:05,577 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 17:18:05,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:05,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:05,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524897373] [2021-02-19 17:18:05,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:05,578 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:05,877 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-02-19 17:18:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:05,878 INFO L225 Difference]: With dead ends: 129 [2021-02-19 17:18:05,878 INFO L226 Difference]: Without dead ends: 122 [2021-02-19 17:18:05,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-02-19 17:18:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-02-19 17:18:05,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-02-19 17:18:05,880 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-02-19 17:18:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:05,880 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-02-19 17:18:05,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-02-19 17:18:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:05,881 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:05,881 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:06,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 17:18:06,094 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash 900778251, now seen corresponding path program 151 times [2021-02-19 17:18:06,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:06,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260805044] [2021-02-19 17:18:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:06,244 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 17:18:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260805044] [2021-02-19 17:18:06,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358982032] [2021-02-19 17:18:06,245 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:06,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:06,619 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 17:18:06,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:06,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:06,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028003790] [2021-02-19 17:18:06,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:06,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:06,620 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:06,936 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-02-19 17:18:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:06,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:06,938 INFO L225 Difference]: With dead ends: 130 [2021-02-19 17:18:06,938 INFO L226 Difference]: Without dead ends: 123 [2021-02-19 17:18:06,938 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-02-19 17:18:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-02-19 17:18:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-02-19 17:18:06,939 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-02-19 17:18:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:06,939 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-02-19 17:18:06,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-02-19 17:18:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:06,940 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:06,940 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:07,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:07,140 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1314895217, now seen corresponding path program 152 times [2021-02-19 17:18:07,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:07,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550513664] [2021-02-19 17:18:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:07,257 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 17:18:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550513664] [2021-02-19 17:18:07,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215116907] [2021-02-19 17:18:07,257 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:07,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:07,538 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 17:18:07,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:07,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:07,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221406197] [2021-02-19 17:18:07,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:07,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:07,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:07,539 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:07,807 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-02-19 17:18:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:07,808 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:07,809 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:18:07,809 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:18:07,809 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:18:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-02-19 17:18:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-02-19 17:18:07,810 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-02-19 17:18:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:07,810 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-02-19 17:18:07,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-02-19 17:18:07,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:07,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:07,810 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:08,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-02-19 17:18:08,011 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1299434421, now seen corresponding path program 153 times [2021-02-19 17:18:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:08,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638552702] [2021-02-19 17:18:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:08,123 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 17:18:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638552702] [2021-02-19 17:18:08,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944366791] [2021-02-19 17:18:08,123 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:08,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:18:08,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:08,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:08,500 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 17:18:08,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:08,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:08,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079709752] [2021-02-19 17:18:08,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:08,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:08,501 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:08,931 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-02-19 17:18:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:08,932 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:18:08,932 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:18:08,933 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:18:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-02-19 17:18:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-02-19 17:18:08,934 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-02-19 17:18:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:08,934 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-02-19 17:18:08,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-02-19 17:18:08,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:08,934 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:08,934 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:09,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:09,138 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:09,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:09,138 INFO L82 PathProgramCache]: Analyzing trace with hash 831275543, now seen corresponding path program 154 times [2021-02-19 17:18:09,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:09,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423011477] [2021-02-19 17:18:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:09,294 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 17:18:09,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423011477] [2021-02-19 17:18:09,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015790557] [2021-02-19 17:18:09,294 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:09,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:09,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:09,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:09,684 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 17:18:09,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:09,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:09,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577333099] [2021-02-19 17:18:09,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:09,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:09,685 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:10,281 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-02-19 17:18:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:10,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:10,283 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:18:10,283 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:18:10,283 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:18:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-02-19 17:18:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-02-19 17:18:10,284 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-02-19 17:18:10,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:10,284 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-02-19 17:18:10,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:10,284 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-02-19 17:18:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:10,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:10,284 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:10,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:10,486 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:10,486 INFO L82 PathProgramCache]: Analyzing trace with hash 846736339, now seen corresponding path program 155 times [2021-02-19 17:18:10,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:10,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477201700] [2021-02-19 17:18:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:10,633 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 17:18:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477201700] [2021-02-19 17:18:10,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252013284] [2021-02-19 17:18:10,633 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:10,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:18:10,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:10,924 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 17:18:10,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:10,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:10,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127972688] [2021-02-19 17:18:10,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:10,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:10,925 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:11,183 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-02-19 17:18:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:11,184 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:18:11,184 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:18:11,184 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:18:11,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-02-19 17:18:11,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-02-19 17:18:11,186 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-02-19 17:18:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:11,186 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-02-19 17:18:11,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-02-19 17:18:11,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:11,186 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:11,186 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:11,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-02-19 17:18:11,386 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:11,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:11,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1418191145, now seen corresponding path program 156 times [2021-02-19 17:18:11,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:11,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305673163] [2021-02-19 17:18:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:11,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:11,547 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 17:18:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305673163] [2021-02-19 17:18:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400091047] [2021-02-19 17:18:11,547 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:11,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:11,957 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 17:18:11,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:11,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:11,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047167109] [2021-02-19 17:18:11,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:11,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:11,958 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:12,309 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-02-19 17:18:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:12,310 INFO L225 Difference]: With dead ends: 133 [2021-02-19 17:18:12,310 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 17:18:12,310 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 17:18:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-02-19 17:18:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-02-19 17:18:12,312 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-02-19 17:18:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:12,312 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-02-19 17:18:12,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-02-19 17:18:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:12,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:12,312 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:12,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:12,512 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -262816045, now seen corresponding path program 157 times [2021-02-19 17:18:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383127454] [2021-02-19 17:18:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:12,676 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 17:18:12,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383127454] [2021-02-19 17:18:12,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399848924] [2021-02-19 17:18:12,677 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:12,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:13,070 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 17:18:13,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:13,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:13,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766121238] [2021-02-19 17:18:13,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:13,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:13,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:13,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:13,071 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:13,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:13,553 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-02-19 17:18:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:13,555 INFO L225 Difference]: With dead ends: 168 [2021-02-19 17:18:13,555 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:18:13,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:13,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:18:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-02-19 17:18:13,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-02-19 17:18:13,557 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-02-19 17:18:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:13,557 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-02-19 17:18:13,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:13,557 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-02-19 17:18:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:13,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:13,557 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:13,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:13,757 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:13,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:13,758 INFO L82 PathProgramCache]: Analyzing trace with hash -247355249, now seen corresponding path program 158 times [2021-02-19 17:18:13,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:13,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583347973] [2021-02-19 17:18:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:13,921 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 17:18:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583347973] [2021-02-19 17:18:13,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368078624] [2021-02-19 17:18:13,921 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:13,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:13,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:13,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:13,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:14,331 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 17:18:14,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:14,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:14,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522958275] [2021-02-19 17:18:14,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:14,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:14,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:14,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:14,331 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:14,774 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-02-19 17:18:14,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:14,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:14,775 INFO L225 Difference]: With dead ends: 174 [2021-02-19 17:18:14,775 INFO L226 Difference]: Without dead ends: 167 [2021-02-19 17:18:14,775 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-19 17:18:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-02-19 17:18:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-02-19 17:18:14,776 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-02-19 17:18:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:14,776 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-02-19 17:18:14,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-02-19 17:18:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:14,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:14,776 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:14,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 17:18:14,977 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:14,977 INFO L82 PathProgramCache]: Analyzing trace with hash 324099557, now seen corresponding path program 159 times [2021-02-19 17:18:14,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:14,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518108687] [2021-02-19 17:18:14,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:15,091 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 17:18:15,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518108687] [2021-02-19 17:18:15,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370706326] [2021-02-19 17:18:15,092 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:15,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:18:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:15,385 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 17:18:15,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:15,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:15,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423704398] [2021-02-19 17:18:15,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:15,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:15,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:15,386 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:15,755 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-02-19 17:18:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:15,756 INFO L225 Difference]: With dead ends: 153 [2021-02-19 17:18:15,756 INFO L226 Difference]: Without dead ends: 146 [2021-02-19 17:18:15,756 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-02-19 17:18:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-02-19 17:18:15,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-02-19 17:18:15,758 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-02-19 17:18:15,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:15,758 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-02-19 17:18:15,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-02-19 17:18:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:15,758 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:15,758 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:15,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-02-19 17:18:15,958 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:15,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1761515091, now seen corresponding path program 160 times [2021-02-19 17:18:15,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:15,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593930546] [2021-02-19 17:18:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593930546] [2021-02-19 17:18:16,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477423027] [2021-02-19 17:18:16,123 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:16,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:16,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:16,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:16,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:16,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494958701] [2021-02-19 17:18:16,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:16,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:16,458 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:17,541 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-02-19 17:18:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:18:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:17,542 INFO L225 Difference]: With dead ends: 196 [2021-02-19 17:18:17,542 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:18:17,542 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 17:18:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:18:17,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-02-19 17:18:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-02-19 17:18:17,544 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-02-19 17:18:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:17,544 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-02-19 17:18:17,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:17,544 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-02-19 17:18:17,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:17,544 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:17,544 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:17,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-02-19 17:18:17,762 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:17,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1378794703, now seen corresponding path program 161 times [2021-02-19 17:18:17,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:17,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005534931] [2021-02-19 17:18:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005534931] [2021-02-19 17:18:17,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515750311] [2021-02-19 17:18:17,883 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:17,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:18:17,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:17,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:17,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:18,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:18,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:18,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120510663] [2021-02-19 17:18:18,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:18,284 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:19,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:19,217 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-02-19 17:18:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:18:19,218 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:19,218 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:18:19,218 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:18:19,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:18:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-02-19 17:18:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-02-19 17:18:19,220 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-02-19 17:18:19,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:19,220 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-02-19 17:18:19,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:19,220 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-02-19 17:18:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:19,220 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:19,220 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:19,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 17:18:19,420 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash -836878765, now seen corresponding path program 162 times [2021-02-19 17:18:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:19,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76448748] [2021-02-19 17:18:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76448748] [2021-02-19 17:18:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633691779] [2021-02-19 17:18:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:19,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:19,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:19,603 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:19,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:19,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:19,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368013332] [2021-02-19 17:18:19,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:19,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:19,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:19,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:19,872 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:20,791 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-02-19 17:18:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 17:18:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:20,793 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:18:20,793 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:18:20,793 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 17:18:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:18:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-02-19 17:18:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-02-19 17:18:20,795 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-02-19 17:18:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:20,795 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-02-19 17:18:20,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-02-19 17:18:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:20,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:20,795 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:20,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-02-19 17:18:20,996 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash -821417969, now seen corresponding path program 163 times [2021-02-19 17:18:20,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:20,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510771657] [2021-02-19 17:18:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:21,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510771657] [2021-02-19 17:18:21,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383564784] [2021-02-19 17:18:21,170 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:21,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:21,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:21,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:21,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128878710] [2021-02-19 17:18:21,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:21,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:21,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:21,840 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:23,222 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-02-19 17:18:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:18:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:23,224 INFO L225 Difference]: With dead ends: 197 [2021-02-19 17:18:23,224 INFO L226 Difference]: Without dead ends: 190 [2021-02-19 17:18:23,224 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:18:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-02-19 17:18:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-02-19 17:18:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-02-19 17:18:23,226 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-02-19 17:18:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:23,226 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-02-19 17:18:23,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:23,226 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-02-19 17:18:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:23,226 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:23,226 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:23,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:23,427 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:23,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:23,427 INFO L82 PathProgramCache]: Analyzing trace with hash -213756021, now seen corresponding path program 164 times [2021-02-19 17:18:23,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:23,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138772582] [2021-02-19 17:18:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:23,565 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 17:18:23,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138772582] [2021-02-19 17:18:23,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130489298] [2021-02-19 17:18:23,565 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:23,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:23,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:23,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:23,863 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 17:18:23,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:23,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:23,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392676261] [2021-02-19 17:18:23,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:23,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:23,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:23,863 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:24,244 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-02-19 17:18:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:24,245 INFO L225 Difference]: With dead ends: 158 [2021-02-19 17:18:24,245 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:18:24,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:18:24,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-02-19 17:18:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-02-19 17:18:24,246 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-02-19 17:18:24,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:24,246 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-02-19 17:18:24,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-02-19 17:18:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:24,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:24,246 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:24,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:24,447 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash -859274689, now seen corresponding path program 165 times [2021-02-19 17:18:24,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:24,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510922503] [2021-02-19 17:18:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:24,643 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 17:18:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510922503] [2021-02-19 17:18:24,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043782584] [2021-02-19 17:18:24,643 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:24,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:18:24,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:24,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:25,084 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 17:18:25,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:25,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:25,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981164445] [2021-02-19 17:18:25,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:25,085 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:25,526 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-02-19 17:18:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:25,528 INFO L225 Difference]: With dead ends: 128 [2021-02-19 17:18:25,528 INFO L226 Difference]: Without dead ends: 121 [2021-02-19 17:18:25,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-02-19 17:18:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-02-19 17:18:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-02-19 17:18:25,529 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-02-19 17:18:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:25,529 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-02-19 17:18:25,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-02-19 17:18:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:25,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:25,530 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:25,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:25,730 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1220019139, now seen corresponding path program 166 times [2021-02-19 17:18:25,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:25,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757667621] [2021-02-19 17:18:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:25,914 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 17:18:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757667621] [2021-02-19 17:18:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733277207] [2021-02-19 17:18:25,914 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:25,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:25,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:25,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:25,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:26,361 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 17:18:26,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:26,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:26,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857317570] [2021-02-19 17:18:26,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:26,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:26,361 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:26,798 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-02-19 17:18:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:26,799 INFO L225 Difference]: With dead ends: 151 [2021-02-19 17:18:26,800 INFO L226 Difference]: Without dead ends: 144 [2021-02-19 17:18:26,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:26,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-02-19 17:18:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-02-19 17:18:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-02-19 17:18:26,801 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-02-19 17:18:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:26,801 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-02-19 17:18:26,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-02-19 17:18:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:26,801 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:26,801 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:27,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:27,002 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:27,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1235479935, now seen corresponding path program 167 times [2021-02-19 17:18:27,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:27,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902235118] [2021-02-19 17:18:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:27,134 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 17:18:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902235118] [2021-02-19 17:18:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618490871] [2021-02-19 17:18:27,135 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:27,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:18:27,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:27,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:27,461 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 17:18:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678925793] [2021-02-19 17:18:27,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:27,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:27,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:27,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:27,462 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:27,804 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-02-19 17:18:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:27,805 INFO L225 Difference]: With dead ends: 138 [2021-02-19 17:18:27,805 INFO L226 Difference]: Without dead ends: 131 [2021-02-19 17:18:27,805 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:18:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-02-19 17:18:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-02-19 17:18:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-02-19 17:18:27,807 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-02-19 17:18:27,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:27,807 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-02-19 17:18:27,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-02-19 17:18:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:27,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:27,807 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:28,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,007 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash -928777397, now seen corresponding path program 168 times [2021-02-19 17:18:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:28,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532343318] [2021-02-19 17:18:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:28,197 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 17:18:28,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532343318] [2021-02-19 17:18:28,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805895415] [2021-02-19 17:18:28,198 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:28,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 17:18:28,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:28,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:28,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:28,722 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 17:18:28,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:28,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765189146] [2021-02-19 17:18:28,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:28,723 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:29,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:29,366 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-02-19 17:18:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:29,367 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:18:29,368 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:18:29,368 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:29,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:18:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-02-19 17:18:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-02-19 17:18:29,369 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-02-19 17:18:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:29,369 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-02-19 17:18:29,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:29,369 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-02-19 17:18:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:29,369 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:29,369 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:29,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:29,570 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:29,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:29,570 INFO L82 PathProgramCache]: Analyzing trace with hash -913316601, now seen corresponding path program 169 times [2021-02-19 17:18:29,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:29,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225655950] [2021-02-19 17:18:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:29,709 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 17:18:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225655950] [2021-02-19 17:18:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235447608] [2021-02-19 17:18:29,709 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:29,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:30,019 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 17:18:30,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:30,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:30,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803726920] [2021-02-19 17:18:30,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:30,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:30,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:30,020 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:30,506 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-02-19 17:18:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:30,507 INFO L225 Difference]: With dead ends: 158 [2021-02-19 17:18:30,507 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:18:30,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:18:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-02-19 17:18:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-02-19 17:18:30,508 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-02-19 17:18:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:30,508 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-02-19 17:18:30,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-02-19 17:18:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:30,508 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:30,509 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:30,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 17:18:30,709 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash -341861795, now seen corresponding path program 170 times [2021-02-19 17:18:30,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:30,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341069648] [2021-02-19 17:18:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:30,829 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 17:18:30,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341069648] [2021-02-19 17:18:30,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559501989] [2021-02-19 17:18:30,830 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:30,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:30,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:31,222 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 17:18:31,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:31,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:31,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143740253] [2021-02-19 17:18:31,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:31,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:31,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:31,223 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:31,653 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-02-19 17:18:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:31,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:31,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:31,654 INFO L225 Difference]: With dead ends: 132 [2021-02-19 17:18:31,655 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 17:18:31,655 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 17:18:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-02-19 17:18:31,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-02-19 17:18:31,656 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-02-19 17:18:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:31,656 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-02-19 17:18:31,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-02-19 17:18:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:31,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:31,656 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:31,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-02-19 17:18:31,857 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2022868985, now seen corresponding path program 171 times [2021-02-19 17:18:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:31,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247417134] [2021-02-19 17:18:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:32,054 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 17:18:32,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247417134] [2021-02-19 17:18:32,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440465052] [2021-02-19 17:18:32,054 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:32,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 17:18:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:32,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:32,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:32,526 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 17:18:32,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:32,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:32,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813402858] [2021-02-19 17:18:32,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:32,527 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:33,309 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-02-19 17:18:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:33,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:33,311 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:18:33,311 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:18:33,311 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:18:33,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-02-19 17:18:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-02-19 17:18:33,312 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-02-19 17:18:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:33,312 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-02-19 17:18:33,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-02-19 17:18:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:33,313 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:33,313 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:33,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-02-19 17:18:33,513 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2007408189, now seen corresponding path program 172 times [2021-02-19 17:18:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:33,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106042315] [2021-02-19 17:18:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:33,698 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 17:18:33,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106042315] [2021-02-19 17:18:33,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12293525] [2021-02-19 17:18:33,699 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:33,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:33,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:34,058 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 17:18:34,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:34,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:34,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598895656] [2021-02-19 17:18:34,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:34,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:34,059 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:34,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:34,590 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-02-19 17:18:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:34,592 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:18:34,592 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:18:34,592 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:18:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:18:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-02-19 17:18:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-02-19 17:18:34,593 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-02-19 17:18:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:34,593 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-02-19 17:18:34,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-02-19 17:18:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:34,594 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:34,594 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:34,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:34,794 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1435953383, now seen corresponding path program 173 times [2021-02-19 17:18:34,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:34,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34960241] [2021-02-19 17:18:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:34,928 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 17:18:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34960241] [2021-02-19 17:18:34,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734271121] [2021-02-19 17:18:34,929 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:34,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:18:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:35,402 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 17:18:35,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:35,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021831110] [2021-02-19 17:18:35,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:35,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:35,403 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:36,076 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-02-19 17:18:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:36,078 INFO L225 Difference]: With dead ends: 156 [2021-02-19 17:18:36,078 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 17:18:36,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 17:18:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-02-19 17:18:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-02-19 17:18:36,080 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-02-19 17:18:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:36,080 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-02-19 17:18:36,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-02-19 17:18:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:36,080 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:36,080 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:36,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:36,281 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1973808961, now seen corresponding path program 174 times [2021-02-19 17:18:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827374729] [2021-02-19 17:18:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:36,464 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 17:18:36,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827374729] [2021-02-19 17:18:36,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102478631] [2021-02-19 17:18:36,465 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:36,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:36,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:36,934 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 17:18:36,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:36,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359921230] [2021-02-19 17:18:36,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:36,935 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:37,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:37,399 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-02-19 17:18:37,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:37,401 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:18:37,401 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:18:37,401 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:18:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-02-19 17:18:37,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 17:18:37,402 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-02-19 17:18:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:37,402 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 17:18:37,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 17:18:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:37,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:37,403 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:37,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-02-19 17:18:37,603 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:37,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1137070705, now seen corresponding path program 175 times [2021-02-19 17:18:37,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:37,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296670730] [2021-02-19 17:18:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:37,762 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 17:18:37,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296670730] [2021-02-19 17:18:37,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365253344] [2021-02-19 17:18:37,763 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:37,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:37,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:38,094 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 17:18:38,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:38,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:38,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528952081] [2021-02-19 17:18:38,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:38,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:38,095 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:38,625 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-02-19 17:18:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 17:18:38,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:38,627 INFO L225 Difference]: With dead ends: 173 [2021-02-19 17:18:38,627 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 17:18:38,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 17:18:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-02-19 17:18:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-02-19 17:18:38,628 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-02-19 17:18:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:38,628 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-02-19 17:18:38,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-02-19 17:18:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:38,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:38,629 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:38,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:38,829 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1121609909, now seen corresponding path program 176 times [2021-02-19 17:18:38,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:38,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247205012] [2021-02-19 17:18:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:38,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:39,027 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 17:18:39,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247205012] [2021-02-19 17:18:39,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579648058] [2021-02-19 17:18:39,028 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:39,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:39,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:39,454 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 17:18:39,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:39,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:39,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891360374] [2021-02-19 17:18:39,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:39,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:39,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:39,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:39,455 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:40,195 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-02-19 17:18:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 17:18:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:40,197 INFO L225 Difference]: With dead ends: 179 [2021-02-19 17:18:40,197 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:18:40,197 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:18:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-02-19 17:18:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-02-19 17:18:40,199 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-02-19 17:18:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:40,199 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-02-19 17:18:40,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-02-19 17:18:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:40,199 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:40,199 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:40,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:40,400 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash -550155103, now seen corresponding path program 177 times [2021-02-19 17:18:40,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:40,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965054829] [2021-02-19 17:18:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:40,592 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 17:18:40,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965054829] [2021-02-19 17:18:40,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633674391] [2021-02-19 17:18:40,593 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:40,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:18:40,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:41,065 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 17:18:41,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:41,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:41,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311589127] [2021-02-19 17:18:41,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:41,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:41,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:41,066 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:41,508 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-02-19 17:18:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:18:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:41,510 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:18:41,510 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:18:41,510 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:18:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-02-19 17:18:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-02-19 17:18:41,511 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-02-19 17:18:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:41,511 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-02-19 17:18:41,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-02-19 17:18:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:41,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:41,511 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:41,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,712 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:41,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:41,712 INFO L82 PathProgramCache]: Analyzing trace with hash 887260431, now seen corresponding path program 178 times [2021-02-19 17:18:41,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:41,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554057240] [2021-02-19 17:18:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554057240] [2021-02-19 17:18:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319212934] [2021-02-19 17:18:41,852 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:41,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:41,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:41,869 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:41,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754175272] [2021-02-19 17:18:42,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:42,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:42,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:42,150 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:42,872 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-02-19 17:18:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:42,874 INFO L225 Difference]: With dead ends: 175 [2021-02-19 17:18:42,874 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:18:42,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:18:42,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-02-19 17:18:42,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-02-19 17:18:42,875 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-02-19 17:18:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:42,875 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-02-19 17:18:42,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-02-19 17:18:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:42,876 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:42,876 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:43,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:43,076 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash 504540043, now seen corresponding path program 179 times [2021-02-19 17:18:43,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:43,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853154956] [2021-02-19 17:18:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:43,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853154956] [2021-02-19 17:18:43,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481366072] [2021-02-19 17:18:43,265 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:43,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:18:43,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:43,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:43,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:43,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:43,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857679431] [2021-02-19 17:18:43,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:43,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:43,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:43,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:43,640 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:44,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:44,407 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-02-19 17:18:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:44,409 INFO L225 Difference]: With dead ends: 163 [2021-02-19 17:18:44,409 INFO L226 Difference]: Without dead ends: 156 [2021-02-19 17:18:44,409 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:18:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-02-19 17:18:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-02-19 17:18:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-02-19 17:18:44,410 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-02-19 17:18:44,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:44,410 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-02-19 17:18:44,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-02-19 17:18:44,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:44,411 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:44,411 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:44,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:44,611 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1711133425, now seen corresponding path program 180 times [2021-02-19 17:18:44,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:44,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559709050] [2021-02-19 17:18:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:44,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559709050] [2021-02-19 17:18:44,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358067714] [2021-02-19 17:18:44,808 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:44,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:44,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:45,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:45,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:45,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322322326] [2021-02-19 17:18:45,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:45,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:45,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:45,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:45,207 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:45,952 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-02-19 17:18:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:18:45,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:45,962 INFO L225 Difference]: With dead ends: 208 [2021-02-19 17:18:45,962 INFO L226 Difference]: Without dead ends: 201 [2021-02-19 17:18:45,966 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:18:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-19 17:18:45,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-02-19 17:18:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:45,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-02-19 17:18:45,968 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-02-19 17:18:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:45,969 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-02-19 17:18:45,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:45,969 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-02-19 17:18:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:45,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:45,969 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:46,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:46,182 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1695672629, now seen corresponding path program 181 times [2021-02-19 17:18:46,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:46,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395656080] [2021-02-19 17:18:46,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:46,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395656080] [2021-02-19 17:18:46,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989290295] [2021-02-19 17:18:46,434 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:46,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:47,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:47,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:47,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929810990] [2021-02-19 17:18:47,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:47,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:47,016 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:47,736 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-02-19 17:18:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:47,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:47,737 INFO L225 Difference]: With dead ends: 198 [2021-02-19 17:18:47,737 INFO L226 Difference]: Without dead ends: 191 [2021-02-19 17:18:47,737 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:18:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-02-19 17:18:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-02-19 17:18:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-02-19 17:18:47,739 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-02-19 17:18:47,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:47,739 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-02-19 17:18:47,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-02-19 17:18:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:47,739 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:47,739 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:47,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-02-19 17:18:47,939 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1088010681, now seen corresponding path program 182 times [2021-02-19 17:18:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:47,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84850900] [2021-02-19 17:18:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:48,070 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 17:18:48,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84850900] [2021-02-19 17:18:48,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202007390] [2021-02-19 17:18:48,070 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:48,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:48,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 17:18:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:48,407 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 17:18:48,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:48,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123054164] [2021-02-19 17:18:48,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:48,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:48,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:48,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:48,408 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:48,845 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-02-19 17:18:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:18:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-02-19 17:18:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:48,847 INFO L225 Difference]: With dead ends: 164 [2021-02-19 17:18:48,847 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 17:18:48,847 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-02-19 17:18:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 17:18:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-02-19 17:18:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-02-19 17:18:48,849 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-02-19 17:18:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:48,849 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-02-19 17:18:48,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 17:18:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-02-19 17:18:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:48,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:48,849 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:49,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-02-19 17:18:49,054 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1517232575, now seen corresponding path program 183 times [2021-02-19 17:18:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:49,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641479871] [2021-02-19 17:18:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641479871] [2021-02-19 17:18:49,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029512404] [2021-02-19 17:18:49,259 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:49,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:18:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:49,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:49,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:49,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:49,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551920201] [2021-02-19 17:18:49,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:49,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:49,696 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:50,380 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-02-19 17:18:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:18:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:50,382 INFO L225 Difference]: With dead ends: 135 [2021-02-19 17:18:50,382 INFO L226 Difference]: Without dead ends: 128 [2021-02-19 17:18:50,382 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-02-19 17:18:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-02-19 17:18:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-02-19 17:18:50,384 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-02-19 17:18:50,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:50,384 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-02-19 17:18:50,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-02-19 17:18:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:50,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:50,384 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:50,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:50,590 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:50,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:50,590 INFO L82 PathProgramCache]: Analyzing trace with hash -698440893, now seen corresponding path program 184 times [2021-02-19 17:18:50,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:50,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875516219] [2021-02-19 17:18:50,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:50,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875516219] [2021-02-19 17:18:50,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684548282] [2021-02-19 17:18:50,758 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:50,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:18:50,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:50,784 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:51,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:51,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:51,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473955588] [2021-02-19 17:18:51,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:51,039 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:51,641 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-02-19 17:18:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:18:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:51,643 INFO L225 Difference]: With dead ends: 178 [2021-02-19 17:18:51,643 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:18:51,643 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:18:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:18:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-02-19 17:18:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-02-19 17:18:51,644 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-02-19 17:18:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:51,644 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-02-19 17:18:51,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-02-19 17:18:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:51,645 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:51,645 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:51,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-02-19 17:18:51,846 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash -682980097, now seen corresponding path program 185 times [2021-02-19 17:18:51,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634328351] [2021-02-19 17:18:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:52,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634328351] [2021-02-19 17:18:52,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557758909] [2021-02-19 17:18:52,072 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:52,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:18:52,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:52,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:52,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:52,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879320200] [2021-02-19 17:18:52,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:52,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:52,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:52,510 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:53,474 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-02-19 17:18:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:18:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:53,477 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:18:53,477 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:18:53,477 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:18:53,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-02-19 17:18:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-02-19 17:18:53,479 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-02-19 17:18:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:53,479 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-02-19 17:18:53,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-02-19 17:18:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:53,479 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:53,479 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:53,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:53,682 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:53,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:53,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1447729867, now seen corresponding path program 186 times [2021-02-19 17:18:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:53,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476909977] [2021-02-19 17:18:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:53,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476909977] [2021-02-19 17:18:53,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951661196] [2021-02-19 17:18:53,902 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:53,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:18:53,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:53,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:54,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:54,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:54,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427841083] [2021-02-19 17:18:54,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:54,277 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:54,827 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-02-19 17:18:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:18:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:54,828 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:18:54,829 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:18:54,829 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:18:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-02-19 17:18:54,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-02-19 17:18:54,830 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-02-19 17:18:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:54,830 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-02-19 17:18:54,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-02-19 17:18:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:54,830 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:54,830 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:55,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-02-19 17:18:55,031 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:55,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1463190663, now seen corresponding path program 187 times [2021-02-19 17:18:55,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:55,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935837646] [2021-02-19 17:18:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935837646] [2021-02-19 17:18:55,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029797001] [2021-02-19 17:18:55,159 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:55,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:55,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:55,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:55,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617821592] [2021-02-19 17:18:55,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:55,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:55,874 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:56,730 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-02-19 17:18:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:18:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:56,732 INFO L225 Difference]: With dead ends: 182 [2021-02-19 17:18:56,732 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 17:18:56,732 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:18:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 17:18:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-02-19 17:18:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-02-19 17:18:56,733 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-02-19 17:18:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-02-19 17:18:56,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-02-19 17:18:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:56,734 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:56,734 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:56,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:56,934 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:56,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:56,934 INFO L82 PathProgramCache]: Analyzing trace with hash 2034645469, now seen corresponding path program 188 times [2021-02-19 17:18:56,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:56,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895402424] [2021-02-19 17:18:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895402424] [2021-02-19 17:18:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434557083] [2021-02-19 17:18:57,143 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:57,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:18:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:57,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:57,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:57,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 17:18:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027557001] [2021-02-19 17:18:57,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 17:18:57,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 17:18:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:18:57,759 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:18:58,337 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-02-19 17:18:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:18:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 19 [2021-02-19 17:18:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:18:58,339 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:18:58,339 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:18:58,339 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:18:58,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:18:58,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-02-19 17:18:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:18:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-02-19 17:18:58,340 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-02-19 17:18:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:18:58,340 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-02-19 17:18:58,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 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 17:18:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-02-19 17:18:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:18:58,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:18:58,341 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:18:58,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-02-19 17:18:58,541 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:18:58,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:18:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1512670871, now seen corresponding path program 189 times [2021-02-19 17:18:58,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:18:58,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236254192] [2021-02-19 17:18:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:18:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:18:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:58,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236254192] [2021-02-19 17:18:58,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602654347] [2021-02-19 17:18:58,664 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:18:58,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:18:58,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:18:58,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:18:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:18:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:18:59,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:18:59,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:18:59,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051907401] [2021-02-19 17:18:59,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:18:59,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:18:59,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:18:59,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:18:59,065 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:00,837 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-02-19 17:19:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 17:19:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:00,840 INFO L225 Difference]: With dead ends: 201 [2021-02-19 17:19:00,840 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:19:00,840 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 17:19:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:19:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-02-19 17:19:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-02-19 17:19:00,841 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-02-19 17:19:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:00,841 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-02-19 17:19:00,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-02-19 17:19:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:00,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:00,842 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:01,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:01,042 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:01,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1129950483, now seen corresponding path program 190 times [2021-02-19 17:19:01,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:01,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784859241] [2021-02-19 17:19:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784859241] [2021-02-19 17:19:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889307491] [2021-02-19 17:19:01,257 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:01,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:01,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:01,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:01,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:01,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576806324] [2021-02-19 17:19:01,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:01,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:01,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:01,635 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:02,520 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-02-19 17:19:02,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:19:02,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:02,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:02,521 INFO L225 Difference]: With dead ends: 161 [2021-02-19 17:19:02,521 INFO L226 Difference]: Without dead ends: 154 [2021-02-19 17:19:02,522 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-02-19 17:19:02,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-02-19 17:19:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-02-19 17:19:02,523 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-02-19 17:19:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:02,523 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-02-19 17:19:02,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-02-19 17:19:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:02,523 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:02,523 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:02,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:02,724 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1085722985, now seen corresponding path program 191 times [2021-02-19 17:19:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807750474] [2021-02-19 17:19:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:02,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807750474] [2021-02-19 17:19:02,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113638798] [2021-02-19 17:19:02,961 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:02,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:19:02,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:02,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:02,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:03,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:03,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990750026] [2021-02-19 17:19:03,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:03,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:03,481 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:05,482 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-02-19 17:19:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 17:19:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:05,484 INFO L225 Difference]: With dead ends: 220 [2021-02-19 17:19:05,484 INFO L226 Difference]: Without dead ends: 213 [2021-02-19 17:19:05,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 17:19:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-02-19 17:19:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-02-19 17:19:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-02-19 17:19:05,485 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-02-19 17:19:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:05,485 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-02-19 17:19:05,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-02-19 17:19:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:05,486 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:05,486 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:05,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 17:19:05,686 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1070262189, now seen corresponding path program 192 times [2021-02-19 17:19:05,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:05,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355200616] [2021-02-19 17:19:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355200616] [2021-02-19 17:19:05,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960708266] [2021-02-19 17:19:05,837 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:05,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:19:05,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:05,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:05,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:06,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:06,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:06,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677849955] [2021-02-19 17:19:06,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:06,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:06,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:06,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:06,165 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:07,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:07,853 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-02-19 17:19:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 17:19:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:07,855 INFO L225 Difference]: With dead ends: 210 [2021-02-19 17:19:07,855 INFO L226 Difference]: Without dead ends: 203 [2021-02-19 17:19:07,856 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 17:19:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-02-19 17:19:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-02-19 17:19:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-02-19 17:19:07,857 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-02-19 17:19:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:07,857 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-02-19 17:19:07,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-02-19 17:19:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:07,857 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:07,857 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:08,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-02-19 17:19:08,058 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash 638416211, now seen corresponding path program 193 times [2021-02-19 17:19:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416771640] [2021-02-19 17:19:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:08,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416771640] [2021-02-19 17:19:08,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500697934] [2021-02-19 17:19:08,277 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:08,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:08,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:08,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:08,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027308235] [2021-02-19 17:19:08,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:08,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:08,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:08,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:08,653 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:09,185 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-02-19 17:19:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:09,187 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:19:09,187 INFO L226 Difference]: Without dead ends: 172 [2021-02-19 17:19:09,187 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-02-19 17:19:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-02-19 17:19:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-02-19 17:19:09,188 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-02-19 17:19:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:09,188 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-02-19 17:19:09,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:09,188 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-02-19 17:19:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:09,188 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:09,188 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:09,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-02-19 17:19:09,389 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash 255695823, now seen corresponding path program 194 times [2021-02-19 17:19:09,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:09,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236693022] [2021-02-19 17:19:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:09,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236693022] [2021-02-19 17:19:09,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662859468] [2021-02-19 17:19:09,530 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:09,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:09,546 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:10,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:10,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:10,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13660414] [2021-02-19 17:19:10,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:10,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:10,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:10,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:10,089 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:11,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:11,222 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-02-19 17:19:11,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:11,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:11,225 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:19:11,225 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:19:11,225 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:19:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:19:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-02-19 17:19:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-02-19 17:19:11,226 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-02-19 17:19:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:11,226 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-02-19 17:19:11,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-02-19 17:19:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:11,227 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:11,227 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:11,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-02-19 17:19:11,427 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1959977645, now seen corresponding path program 195 times [2021-02-19 17:19:11,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:11,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626889054] [2021-02-19 17:19:11,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:11,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626889054] [2021-02-19 17:19:11,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425784669] [2021-02-19 17:19:11,680 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:11,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:19:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:11,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:12,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:12,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:12,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132141934] [2021-02-19 17:19:12,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:12,124 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:13,099 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-02-19 17:19:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 17:19:13,101 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:13,101 INFO L225 Difference]: With dead ends: 217 [2021-02-19 17:19:13,101 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:19:13,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:19:13,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-02-19 17:19:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-02-19 17:19:13,104 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-02-19 17:19:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:13,104 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-02-19 17:19:13,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-02-19 17:19:13,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:13,104 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:13,104 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:13,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-02-19 17:19:13,318 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:13,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1944516849, now seen corresponding path program 196 times [2021-02-19 17:19:13,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:13,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076574388] [2021-02-19 17:19:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076574388] [2021-02-19 17:19:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378502629] [2021-02-19 17:19:13,544 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:13,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:13,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:13,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:14,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:14,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:14,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955263566] [2021-02-19 17:19:14,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:14,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:14,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:14,063 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:15,482 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-02-19 17:19:15,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:19:15,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:15,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:15,485 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:19:15,485 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:19:15,485 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:19:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-02-19 17:19:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-02-19 17:19:15,487 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-02-19 17:19:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:15,487 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-02-19 17:19:15,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-02-19 17:19:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:15,487 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:15,487 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:15,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:15,706 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1268388355, now seen corresponding path program 197 times [2021-02-19 17:19:15,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:15,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548558740] [2021-02-19 17:19:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:15,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548558740] [2021-02-19 17:19:15,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589492826] [2021-02-19 17:19:15,943 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:15,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:19:15,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:15,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:16,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:16,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447718859] [2021-02-19 17:19:16,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:16,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:16,361 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:16,901 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-02-19 17:19:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:16,903 INFO L225 Difference]: With dead ends: 145 [2021-02-19 17:19:16,903 INFO L226 Difference]: Without dead ends: 138 [2021-02-19 17:19:16,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-02-19 17:19:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-02-19 17:19:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-02-19 17:19:16,904 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-02-19 17:19:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:16,904 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-02-19 17:19:16,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-02-19 17:19:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:16,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:16,905 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:17,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-02-19 17:19:17,105 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash -947285113, now seen corresponding path program 198 times [2021-02-19 17:19:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:17,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141829212] [2021-02-19 17:19:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141829212] [2021-02-19 17:19:17,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274460227] [2021-02-19 17:19:17,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:17,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:19:17,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:17,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:17,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:17,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:17,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:17,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686763556] [2021-02-19 17:19:17,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:17,803 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:19,088 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-02-19 17:19:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:19:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:19,091 INFO L225 Difference]: With dead ends: 190 [2021-02-19 17:19:19,091 INFO L226 Difference]: Without dead ends: 183 [2021-02-19 17:19:19,091 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:19:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-02-19 17:19:19,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-02-19 17:19:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-02-19 17:19:19,093 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-02-19 17:19:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:19,093 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-02-19 17:19:19,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:19,093 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-02-19 17:19:19,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:19,093 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:19,093 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:19,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-02-19 17:19:19,306 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:19,306 INFO L82 PathProgramCache]: Analyzing trace with hash -931824317, now seen corresponding path program 199 times [2021-02-19 17:19:19,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912169290] [2021-02-19 17:19:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912169290] [2021-02-19 17:19:19,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881255549] [2021-02-19 17:19:19,542 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:19,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:19,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:20,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:20,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:20,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403698174] [2021-02-19 17:19:20,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:20,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:20,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:20,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:20,148 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:20,862 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-02-19 17:19:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:20,863 INFO L225 Difference]: With dead ends: 181 [2021-02-19 17:19:20,863 INFO L226 Difference]: Without dead ends: 174 [2021-02-19 17:19:20,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-02-19 17:19:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-02-19 17:19:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-02-19 17:19:20,865 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-02-19 17:19:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:20,865 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-02-19 17:19:20,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-02-19 17:19:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:20,865 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:20,865 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:21,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:21,066 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:21,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1198885647, now seen corresponding path program 200 times [2021-02-19 17:19:21,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:21,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969945960] [2021-02-19 17:19:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969945960] [2021-02-19 17:19:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99579511] [2021-02-19 17:19:21,328 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:21,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:21,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:21,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:21,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:21,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:21,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:21,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908673369] [2021-02-19 17:19:21,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:21,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:21,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:21,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:21,866 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:22,941 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-02-19 17:19:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:22,944 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:19:22,944 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:19:22,945 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:19:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-02-19 17:19:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-02-19 17:19:22,946 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-02-19 17:19:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:22,946 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-02-19 17:19:22,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-02-19 17:19:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:22,946 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:22,946 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:23,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-02-19 17:19:23,147 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:23,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1214346443, now seen corresponding path program 201 times [2021-02-19 17:19:23,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:23,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235410078] [2021-02-19 17:19:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:23,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235410078] [2021-02-19 17:19:23,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338217570] [2021-02-19 17:19:23,351 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:23,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:19:23,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:23,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:23,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:23,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:23,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:23,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650645416] [2021-02-19 17:19:23,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:23,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:23,686 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:24,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:24,308 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-02-19 17:19:24,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:24,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:24,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:24,309 INFO L225 Difference]: With dead ends: 199 [2021-02-19 17:19:24,309 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 17:19:24,309 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 17:19:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-02-19 17:19:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-02-19 17:19:24,311 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-02-19 17:19:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:24,311 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-02-19 17:19:24,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-02-19 17:19:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:24,311 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:24,311 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:24,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-02-19 17:19:24,512 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:24,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1785801249, now seen corresponding path program 202 times [2021-02-19 17:19:24,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:24,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085664848] [2021-02-19 17:19:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085664848] [2021-02-19 17:19:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4152463] [2021-02-19 17:19:24,751 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:24,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:24,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:24,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:25,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:25,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:25,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556983442] [2021-02-19 17:19:25,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:25,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:25,421 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:26,431 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-02-19 17:19:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:26,434 INFO L225 Difference]: With dead ends: 152 [2021-02-19 17:19:26,434 INFO L226 Difference]: Without dead ends: 145 [2021-02-19 17:19:26,434 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-02-19 17:19:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-02-19 17:19:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:26,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-02-19 17:19:26,435 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-02-19 17:19:26,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:26,435 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-02-19 17:19:26,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:26,435 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-02-19 17:19:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:26,435 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:26,435 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:26,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:26,636 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1962957161, now seen corresponding path program 203 times [2021-02-19 17:19:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:26,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931536419] [2021-02-19 17:19:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:26,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931536419] [2021-02-19 17:19:26,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581483727] [2021-02-19 17:19:26,877 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:26,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:19:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:26,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:26,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:27,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:27,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:27,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758456506] [2021-02-19 17:19:27,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:27,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:27,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:27,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:27,383 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:28,127 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-02-19 17:19:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:28,128 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:19:28,128 INFO L226 Difference]: Without dead ends: 171 [2021-02-19 17:19:28,129 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:28,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-19 17:19:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-02-19 17:19:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-02-19 17:19:28,130 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-02-19 17:19:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:28,130 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-02-19 17:19:28,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-02-19 17:19:28,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:28,130 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:28,130 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:28,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-02-19 17:19:28,331 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1949289747, now seen corresponding path program 204 times [2021-02-19 17:19:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:28,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713422459] [2021-02-19 17:19:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713422459] [2021-02-19 17:19:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108949885] [2021-02-19 17:19:28,470 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:28,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:19:28,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:28,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:28,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:28,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:28,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:28,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824584231] [2021-02-19 17:19:28,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:28,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:28,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:28,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:28,990 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:30,241 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-02-19 17:19:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:19:30,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:30,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:30,244 INFO L225 Difference]: With dead ends: 170 [2021-02-19 17:19:30,244 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 17:19:30,244 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 17:19:30,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-02-19 17:19:30,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-02-19 17:19:30,246 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-02-19 17:19:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:30,246 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-02-19 17:19:30,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-02-19 17:19:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:30,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:30,246 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:30,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:30,447 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash -266383721, now seen corresponding path program 205 times [2021-02-19 17:19:30,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:30,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369745765] [2021-02-19 17:19:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:30,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369745765] [2021-02-19 17:19:30,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346912429] [2021-02-19 17:19:30,716 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:30,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:30,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:31,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:31,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:31,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687564291] [2021-02-19 17:19:31,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:31,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:31,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:31,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:31,359 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:32,694 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-02-19 17:19:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 17:19:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:32,695 INFO L225 Difference]: With dead ends: 217 [2021-02-19 17:19:32,695 INFO L226 Difference]: Without dead ends: 210 [2021-02-19 17:19:32,695 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:19:32,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-02-19 17:19:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-02-19 17:19:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-02-19 17:19:32,697 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-02-19 17:19:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:32,697 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-02-19 17:19:32,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-02-19 17:19:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:32,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:32,697 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:32,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 17:19:32,898 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -250922925, now seen corresponding path program 206 times [2021-02-19 17:19:32,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:32,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983806033] [2021-02-19 17:19:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:33,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983806033] [2021-02-19 17:19:33,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475109111] [2021-02-19 17:19:33,170 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:33,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:33,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:33,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:33,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:33,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161306506] [2021-02-19 17:19:33,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:33,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:33,724 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:35,214 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-02-19 17:19:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:19:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:35,216 INFO L225 Difference]: With dead ends: 206 [2021-02-19 17:19:35,216 INFO L226 Difference]: Without dead ends: 199 [2021-02-19 17:19:35,216 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:19:35,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-02-19 17:19:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-02-19 17:19:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-02-19 17:19:35,217 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-02-19 17:19:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:35,218 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-02-19 17:19:35,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:35,218 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-02-19 17:19:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:35,218 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:35,218 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:35,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:35,418 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1332985017, now seen corresponding path program 207 times [2021-02-19 17:19:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:35,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60299097] [2021-02-19 17:19:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60299097] [2021-02-19 17:19:35,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412103731] [2021-02-19 17:19:35,576 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:35,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:19:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:35,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:35,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:35,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:35,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084869079] [2021-02-19 17:19:35,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:35,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:35,933 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:36,850 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-02-19 17:19:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:19:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:36,853 INFO L225 Difference]: With dead ends: 150 [2021-02-19 17:19:36,853 INFO L226 Difference]: Without dead ends: 143 [2021-02-19 17:19:36,853 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-02-19 17:19:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-02-19 17:19:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-02-19 17:19:36,854 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-02-19 17:19:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:36,854 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-02-19 17:19:36,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-02-19 17:19:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:36,854 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:36,854 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:37,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-02-19 17:19:37,055 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:37,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash 746308811, now seen corresponding path program 208 times [2021-02-19 17:19:37,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:37,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377628370] [2021-02-19 17:19:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377628370] [2021-02-19 17:19:37,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232621335] [2021-02-19 17:19:37,322 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:37,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:37,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:37,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:37,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:37,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374958681] [2021-02-19 17:19:37,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:37,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:37,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:37,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:37,822 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:39,257 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-02-19 17:19:39,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 17:19:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:39,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:39,259 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:19:39,259 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:19:39,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:19:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:19:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-02-19 17:19:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-02-19 17:19:39,260 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-02-19 17:19:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:39,260 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-02-19 17:19:39,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-02-19 17:19:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:39,261 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:39,261 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:39,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-02-19 17:19:39,461 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 761769607, now seen corresponding path program 209 times [2021-02-19 17:19:39,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:39,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449926403] [2021-02-19 17:19:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:39,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:39,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449926403] [2021-02-19 17:19:39,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844233249] [2021-02-19 17:19:39,616 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:39,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:19:39,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:39,632 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:39,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:39,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:39,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76413936] [2021-02-19 17:19:39,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:39,954 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:41,204 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-02-19 17:19:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 17:19:41,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:41,207 INFO L225 Difference]: With dead ends: 186 [2021-02-19 17:19:41,207 INFO L226 Difference]: Without dead ends: 179 [2021-02-19 17:19:41,207 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:41,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-02-19 17:19:41,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-02-19 17:19:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-02-19 17:19:41,210 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-02-19 17:19:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:41,210 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-02-19 17:19:41,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-02-19 17:19:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:41,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:41,210 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:41,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:41,427 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:41,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1402487725, now seen corresponding path program 210 times [2021-02-19 17:19:41,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:41,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779725216] [2021-02-19 17:19:41,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779725216] [2021-02-19 17:19:41,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739948430] [2021-02-19 17:19:41,668 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:41,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:19:41,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:41,684 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:42,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:42,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:42,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822384769] [2021-02-19 17:19:42,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:42,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:42,092 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:43,065 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-02-19 17:19:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:43,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:43,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:43,068 INFO L225 Difference]: With dead ends: 195 [2021-02-19 17:19:43,068 INFO L226 Difference]: Without dead ends: 188 [2021-02-19 17:19:43,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:43,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-02-19 17:19:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-02-19 17:19:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-02-19 17:19:43,069 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-02-19 17:19:43,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:43,069 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-02-19 17:19:43,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-02-19 17:19:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:43,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:43,070 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:43,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-02-19 17:19:43,270 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1387026929, now seen corresponding path program 211 times [2021-02-19 17:19:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:43,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33547964] [2021-02-19 17:19:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33547964] [2021-02-19 17:19:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948422801] [2021-02-19 17:19:43,533 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:43,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:44,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:44,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:44,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448832745] [2021-02-19 17:19:44,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:44,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:44,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:44,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:44,217 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:45,071 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-02-19 17:19:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:45,073 INFO L225 Difference]: With dead ends: 209 [2021-02-19 17:19:45,073 INFO L226 Difference]: Without dead ends: 202 [2021-02-19 17:19:45,073 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-02-19 17:19:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-02-19 17:19:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-02-19 17:19:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-02-19 17:19:45,074 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-02-19 17:19:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:45,074 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-02-19 17:19:45,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-02-19 17:19:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:45,075 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:45,075 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:45,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:45,275 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:45,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -815572123, now seen corresponding path program 212 times [2021-02-19 17:19:45,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:45,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501014974] [2021-02-19 17:19:45,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501014974] [2021-02-19 17:19:45,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467832426] [2021-02-19 17:19:45,408 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:45,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:45,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:46,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:46,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185969590] [2021-02-19 17:19:46,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:46,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:46,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:46,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:46,116 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:47,315 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-02-19 17:19:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:19:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:47,317 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:19:47,317 INFO L226 Difference]: Without dead ends: 155 [2021-02-19 17:19:47,317 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:19:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-02-19 17:19:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-02-19 17:19:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-02-19 17:19:47,319 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-02-19 17:19:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:47,319 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-02-19 17:19:47,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:47,319 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-02-19 17:19:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:47,320 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:47,320 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:47,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:47,541 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash -447186737, now seen corresponding path program 213 times [2021-02-19 17:19:47,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:47,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827871095] [2021-02-19 17:19:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827871095] [2021-02-19 17:19:47,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896617273] [2021-02-19 17:19:47,704 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:47,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:19:47,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:47,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:48,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:48,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:48,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979427667] [2021-02-19 17:19:48,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:48,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:48,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:48,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:48,077 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:48,537 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-02-19 17:19:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 17:19:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:48,538 INFO L225 Difference]: With dead ends: 127 [2021-02-19 17:19:48,538 INFO L226 Difference]: Without dead ends: 120 [2021-02-19 17:19:48,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:19:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-02-19 17:19:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-02-19 17:19:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:48,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 17:19:48,539 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-02-19 17:19:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:48,539 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 17:19:48,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 17:19:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:48,540 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:48,540 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:48,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-02-19 17:19:48,740 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:48,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1632107091, now seen corresponding path program 214 times [2021-02-19 17:19:48,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:48,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018010589] [2021-02-19 17:19:48,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:49,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018010589] [2021-02-19 17:19:49,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840317432] [2021-02-19 17:19:49,024 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:49,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:19:49,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:49,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:49,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:49,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:49,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509905005] [2021-02-19 17:19:49,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:49,634 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:51,040 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-02-19 17:19:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:51,041 INFO L225 Difference]: With dead ends: 162 [2021-02-19 17:19:51,041 INFO L226 Difference]: Without dead ends: 155 [2021-02-19 17:19:51,042 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:19:51,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-02-19 17:19:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-02-19 17:19:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-02-19 17:19:51,043 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-02-19 17:19:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:51,043 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-02-19 17:19:51,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-02-19 17:19:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:51,043 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:51,043 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:51,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:51,244 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1647567887, now seen corresponding path program 215 times [2021-02-19 17:19:51,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:51,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896285042] [2021-02-19 17:19:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896285042] [2021-02-19 17:19:51,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453791642] [2021-02-19 17:19:51,408 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:51,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:19:51,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:51,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:51,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:51,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:51,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821905335] [2021-02-19 17:19:51,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:51,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:51,764 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:52,762 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-02-19 17:19:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:52,765 INFO L225 Difference]: With dead ends: 158 [2021-02-19 17:19:52,765 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:19:52,765 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:19:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:19:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-02-19 17:19:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-02-19 17:19:52,766 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-02-19 17:19:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:52,766 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-02-19 17:19:52,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-02-19 17:19:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:52,766 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:52,767 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:52,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-02-19 17:19:52,967 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash -516689445, now seen corresponding path program 216 times [2021-02-19 17:19:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:52,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996537425] [2021-02-19 17:19:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:53,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996537425] [2021-02-19 17:19:53,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795630051] [2021-02-19 17:19:53,168 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:53,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:19:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:53,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:53,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:53,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:53,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976546920] [2021-02-19 17:19:53,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:53,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:53,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:53,530 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:54,317 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-02-19 17:19:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:54,320 INFO L225 Difference]: With dead ends: 158 [2021-02-19 17:19:54,320 INFO L226 Difference]: Without dead ends: 151 [2021-02-19 17:19:54,320 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:19:54,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-02-19 17:19:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-02-19 17:19:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:54,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-02-19 17:19:54,322 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-02-19 17:19:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:54,322 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-02-19 17:19:54,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-02-19 17:19:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:54,322 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:54,322 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:54,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-02-19 17:19:54,522 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:54,523 INFO L82 PathProgramCache]: Analyzing trace with hash -501228649, now seen corresponding path program 217 times [2021-02-19 17:19:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:54,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200816961] [2021-02-19 17:19:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:54,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200816961] [2021-02-19 17:19:54,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113848907] [2021-02-19 17:19:54,799 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:54,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:55,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:55,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:55,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925197757] [2021-02-19 17:19:55,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:55,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:55,338 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:56,409 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-02-19 17:19:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 17:19:56,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:56,412 INFO L225 Difference]: With dead ends: 169 [2021-02-19 17:19:56,412 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 17:19:56,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:19:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 17:19:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-02-19 17:19:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 17:19:56,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-02-19 17:19:56,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:56,413 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 17:19:56,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 17:19:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:56,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:56,413 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:56,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-02-19 17:19:56,614 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash 70226157, now seen corresponding path program 218 times [2021-02-19 17:19:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:56,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161916125] [2021-02-19 17:19:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161916125] [2021-02-19 17:19:56,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015040326] [2021-02-19 17:19:56,875 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:56,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:19:56,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:56,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:57,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:57,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:57,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497410306] [2021-02-19 17:19:57,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:57,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:57,448 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:58,118 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-02-19 17:19:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 17:19:58,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:58,119 INFO L225 Difference]: With dead ends: 142 [2021-02-19 17:19:58,119 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 17:19:58,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-02-19 17:19:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 17:19:58,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-02-19 17:19:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:58,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-02-19 17:19:58,121 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-02-19 17:19:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:58,121 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-02-19 17:19:58,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-02-19 17:19:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:58,121 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:58,121 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:58,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:58,321 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:58,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1610781033, now seen corresponding path program 219 times [2021-02-19 17:19:58,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:58,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086519826] [2021-02-19 17:19:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:19:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:58,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086519826] [2021-02-19 17:19:58,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498627995] [2021-02-19 17:19:58,544 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:58,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 17:19:58,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:19:58,561 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:19:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:19:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:19:58,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:19:58,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:19:58,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962109531] [2021-02-19 17:19:58,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:19:58,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:19:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:19:58,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:19:58,925 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:19:59,608 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-02-19 17:19:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:19:59,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:19:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:19:59,611 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:19:59,611 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:19:59,612 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-02-19 17:19:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:19:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-02-19 17:19:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:19:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-02-19 17:19:59,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-02-19 17:19:59,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:19:59,613 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-02-19 17:19:59,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:19:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-02-19 17:19:59,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:19:59,614 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:19:59,614 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:19:59,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:19:59,814 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:19:59,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:19:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1595320237, now seen corresponding path program 220 times [2021-02-19 17:19:59,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:19:59,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877971694] [2021-02-19 17:19:59,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:19:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:00,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877971694] [2021-02-19 17:20:00,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227698257] [2021-02-19 17:20:00,102 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:00,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:00,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:20:00,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:00,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:00,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:00,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:20:00,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990637689] [2021-02-19 17:20:00,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:20:00,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:00,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:20:00,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:20:00,606 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:02,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:02,008 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-02-19 17:20:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:02,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:20:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:02,011 INFO L225 Difference]: With dead ends: 188 [2021-02-19 17:20:02,011 INFO L226 Difference]: Without dead ends: 181 [2021-02-19 17:20:02,011 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-02-19 17:20:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-02-19 17:20:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-02-19 17:20:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:02,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-02-19 17:20:02,012 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-02-19 17:20:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:02,013 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-02-19 17:20:02,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:02,013 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-02-19 17:20:02,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:20:02,013 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:02,013 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:02,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-02-19 17:20:02,213 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1023865431, now seen corresponding path program 221 times [2021-02-19 17:20:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:02,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082209881] [2021-02-19 17:20:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:02,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082209881] [2021-02-19 17:20:02,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158772315] [2021-02-19 17:20:02,489 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:02,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 17:20:02,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:02,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:20:02,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:02,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:02,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:20:02,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372651766] [2021-02-19 17:20:02,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:20:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:20:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:20:02,975 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:03,753 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-02-19 17:20:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 17:20:03,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:20:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:03,755 INFO L225 Difference]: With dead ends: 160 [2021-02-19 17:20:03,755 INFO L226 Difference]: Without dead ends: 153 [2021-02-19 17:20:03,755 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-19 17:20:03,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-02-19 17:20:03,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-02-19 17:20:03,756 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-02-19 17:20:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:03,756 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-02-19 17:20:03,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-02-19 17:20:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:20:03,756 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:03,756 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:03,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:03,957 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2110123543, now seen corresponding path program 5 times [2021-02-19 17:20:03,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:03,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756187602] [2021-02-19 17:20:03,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756187602] [2021-02-19 17:20:04,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516104649] [2021-02-19 17:20:04,122 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:04,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:20:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:04,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 17:20:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:04,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:04,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 17:20:04,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100787244] [2021-02-19 17:20:04,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 17:20:04,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 17:20:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-02-19 17:20:04,327 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 17:20:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:04,791 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-02-19 17:20:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 17:20:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 19 [2021-02-19 17:20:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:04,793 INFO L225 Difference]: With dead ends: 147 [2021-02-19 17:20:04,793 INFO L226 Difference]: Without dead ends: 136 [2021-02-19 17:20:04,793 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-02-19 17:20:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-02-19 17:20:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-02-19 17:20:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:04,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-02-19 17:20:04,794 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-02-19 17:20:04,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:04,794 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-02-19 17:20:04,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 17:20:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-02-19 17:20:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 17:20:04,795 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:04,795 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:04,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-02-19 17:20:04,995 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:04,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:04,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1561721009, now seen corresponding path program 222 times [2021-02-19 17:20:04,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:04,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765845350] [2021-02-19 17:20:04,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765845350] [2021-02-19 17:20:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67627135] [2021-02-19 17:20:05,273 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:05,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 17:20:05,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:05,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 17:20:05,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:05,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:05,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-02-19 17:20:05,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68755276] [2021-02-19 17:20:05,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 17:20:05,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 17:20:05,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-02-19 17:20:05,889 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:07,235 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-02-19 17:20:07,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 17:20:07,237 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-02-19 17:20:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:07,238 INFO L225 Difference]: With dead ends: 172 [2021-02-19 17:20:07,238 INFO L226 Difference]: Without dead ends: 158 [2021-02-19 17:20:07,238 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-02-19 17:20:07,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-19 17:20:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-02-19 17:20:07,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-02-19 17:20:07,239 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-02-19 17:20:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:07,239 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-02-19 17:20:07,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 17:20:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-02-19 17:20:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:07,240 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:07,240 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:07,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:07,440 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash -238115751, now seen corresponding path program 5 times [2021-02-19 17:20:07,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:07,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979665031] [2021-02-19 17:20:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:07,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979665031] [2021-02-19 17:20:07,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053776860] [2021-02-19 17:20:07,756 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:07,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 17:20:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 17:20:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:08,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:08,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 17:20:08,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020899723] [2021-02-19 17:20:08,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 17:20:08,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:08,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 17:20:08,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-02-19 17:20:08,065 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 17:20:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:08,665 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-02-19 17:20:08,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 17:20:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 21 [2021-02-19 17:20:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:08,666 INFO L225 Difference]: With dead ends: 146 [2021-02-19 17:20:08,666 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:20:08,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:20:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-02-19 17:20:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-02-19 17:20:08,668 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-02-19 17:20:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:08,668 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-02-19 17:20:08,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 17:20:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-02-19 17:20:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:08,668 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:08,668 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:08,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-02-19 17:20:08,882 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:08,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1786215385, now seen corresponding path program 223 times [2021-02-19 17:20:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:08,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229486715] [2021-02-19 17:20:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229486715] [2021-02-19 17:20:09,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962053082] [2021-02-19 17:20:09,108 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:09,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:10,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:10,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:10,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848288017] [2021-02-19 17:20:10,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:10,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:10,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:10,544 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:12,506 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-02-19 17:20:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:20:12,509 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:12,509 INFO L225 Difference]: With dead ends: 154 [2021-02-19 17:20:12,509 INFO L226 Difference]: Without dead ends: 147 [2021-02-19 17:20:12,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-02-19 17:20:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-19 17:20:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-02-19 17:20:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-02-19 17:20:12,511 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-02-19 17:20:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:12,511 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-02-19 17:20:12,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:12,511 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-02-19 17:20:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:12,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:12,511 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:12,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-02-19 17:20:12,712 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1403494997, now seen corresponding path program 224 times [2021-02-19 17:20:12,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:12,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44403286] [2021-02-19 17:20:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44403286] [2021-02-19 17:20:12,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185008426] [2021-02-19 17:20:12,943 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:12,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:12,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:12,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:12,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:13,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:13,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:13,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363075198] [2021-02-19 17:20:13,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:13,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:13,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:13,389 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:14,365 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-02-19 17:20:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:20:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:14,366 INFO L225 Difference]: With dead ends: 159 [2021-02-19 17:20:14,366 INFO L226 Difference]: Without dead ends: 152 [2021-02-19 17:20:14,366 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:20:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-19 17:20:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-02-19 17:20:14,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-02-19 17:20:14,368 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-02-19 17:20:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:14,368 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-02-19 17:20:14,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-02-19 17:20:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:14,368 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:14,368 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:14,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 17:20:14,568 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash -812178471, now seen corresponding path program 225 times [2021-02-19 17:20:14,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:14,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004548966] [2021-02-19 17:20:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004548966] [2021-02-19 17:20:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940706268] [2021-02-19 17:20:14,813 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:14,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 17:20:14,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:14,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:15,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:15,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:15,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643794450] [2021-02-19 17:20:15,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:15,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:15,528 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:17,311 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-02-19 17:20:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:20:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:17,314 INFO L225 Difference]: With dead ends: 185 [2021-02-19 17:20:17,314 INFO L226 Difference]: Without dead ends: 178 [2021-02-19 17:20:17,314 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:20:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-02-19 17:20:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-02-19 17:20:17,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:17,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-02-19 17:20:17,316 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-02-19 17:20:17,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:17,316 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-02-19 17:20:17,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:17,316 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-02-19 17:20:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:17,316 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:17,316 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:17,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-02-19 17:20:17,517 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash -796717675, now seen corresponding path program 226 times [2021-02-19 17:20:17,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:17,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054566609] [2021-02-19 17:20:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054566609] [2021-02-19 17:20:17,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966860964] [2021-02-19 17:20:17,863 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:17,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 17:20:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:17,880 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:18,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:18,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603774586] [2021-02-19 17:20:18,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:18,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:18,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:18,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:18,494 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:19,788 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-02-19 17:20:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:20:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:19,790 INFO L225 Difference]: With dead ends: 168 [2021-02-19 17:20:19,790 INFO L226 Difference]: Without dead ends: 161 [2021-02-19 17:20:19,790 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-19 17:20:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-02-19 17:20:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-02-19 17:20:19,791 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-02-19 17:20:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:19,791 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-02-19 17:20:19,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-02-19 17:20:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:19,792 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:19,792 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:20,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-02-19 17:20:20,006 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1948282475, now seen corresponding path program 227 times [2021-02-19 17:20:20,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:20,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191777419] [2021-02-19 17:20:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191777419] [2021-02-19 17:20:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389836518] [2021-02-19 17:20:20,398 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:20,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 17:20:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:20,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:21,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:21,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:21,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397147212] [2021-02-19 17:20:21,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:21,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:21,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:21,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:21,900 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:23,191 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-02-19 17:20:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 17:20:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:23,194 INFO L225 Difference]: With dead ends: 176 [2021-02-19 17:20:23,194 INFO L226 Difference]: Without dead ends: 169 [2021-02-19 17:20:23,195 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-02-19 17:20:23,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-02-19 17:20:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-02-19 17:20:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-02-19 17:20:23,196 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-02-19 17:20:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:23,196 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-02-19 17:20:23,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-02-19 17:20:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:23,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:23,196 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:23,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:23,397 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1932821679, now seen corresponding path program 228 times [2021-02-19 17:20:23,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:23,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486478505] [2021-02-19 17:20:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:23,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486478505] [2021-02-19 17:20:23,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740033161] [2021-02-19 17:20:23,766 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:23,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 17:20:23,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:23,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:23,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564586953] [2021-02-19 17:20:24,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:24,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:24,390 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:26,124 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-02-19 17:20:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 17:20:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:26,126 INFO L225 Difference]: With dead ends: 177 [2021-02-19 17:20:26,126 INFO L226 Difference]: Without dead ends: 170 [2021-02-19 17:20:26,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-02-19 17:20:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-02-19 17:20:26,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-02-19 17:20:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-02-19 17:20:26,127 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-02-19 17:20:26,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:26,127 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-02-19 17:20:26,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:26,127 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-02-19 17:20:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:26,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:26,127 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:26,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-02-19 17:20:26,328 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:26,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1361366873, now seen corresponding path program 229 times [2021-02-19 17:20:26,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:26,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91716985] [2021-02-19 17:20:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:26,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91716985] [2021-02-19 17:20:26,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811828551] [2021-02-19 17:20:26,541 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:26,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 17:20:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 17:20:27,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 17:20:27,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 17:20:27,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514780813] [2021-02-19 17:20:27,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 17:20:27,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 17:20:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 17:20:27,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-02-19 17:20:27,016 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 17:20:27,384 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-02-19 17:20:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 17:20:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 21 [2021-02-19 17:20:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 17:20:27,385 INFO L225 Difference]: With dead ends: 140 [2021-02-19 17:20:27,386 INFO L226 Difference]: Without dead ends: 133 [2021-02-19 17:20:27,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-02-19 17:20:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-19 17:20:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-02-19 17:20:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 17:20:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-02-19 17:20:27,387 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-02-19 17:20:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 17:20:27,387 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-02-19 17:20:27,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 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 17:20:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-02-19 17:20:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 17:20:27,387 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 17:20:27,387 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 17:20:27,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-02-19 17:20:27,588 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 17:20:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 17:20:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1548251993, now seen corresponding path program 230 times [2021-02-19 17:20:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 17:20:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895434574] [2021-02-19 17:20:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 17:20:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 17:20:27,805 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 17:20:27,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895434574] [2021-02-19 17:20:27,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668172606] [2021-02-19 17:20:27,806 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:20:27,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 17:20:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 17:20:27,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 17:20:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-02-19 17:25:17,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 17:25:17,602 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 17:25:17,605 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 17:25:17,605 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 05:25:17 BasicIcfg [2021-02-19 17:25:17,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 17:25:17,606 INFO L168 Benchmark]: Toolchain (without parser) took 578393.66 ms. Allocated memory was 369.1 MB in the beginning and 926.9 MB in the end (delta: 557.8 MB). Free memory was 349.5 MB in the beginning and 854.8 MB in the end (delta: -505.3 MB). Peak memory consumption was 558.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:17,606 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory was 350.6 MB in the beginning and 350.5 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:25:17,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.34 ms. Allocated memory is still 369.1 MB. Free memory was 349.0 MB in the beginning and 347.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 17:25:17,606 INFO L168 Benchmark]: Boogie Preprocessor took 17.99 ms. Allocated memory is still 369.1 MB. Free memory was 347.5 MB in the beginning and 346.6 MB in the end (delta: 948.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:17,606 INFO L168 Benchmark]: RCFGBuilder took 207.36 ms. Allocated memory is still 369.1 MB. Free memory was 346.5 MB in the beginning and 335.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:17,607 INFO L168 Benchmark]: TraceAbstraction took 577754.30 ms. Allocated memory was 369.1 MB in the beginning and 926.9 MB in the end (delta: 557.8 MB). Free memory was 335.0 MB in the beginning and 854.8 MB in the end (delta: -519.8 MB). Peak memory consumption was 543.8 MB. Max. memory is 16.0 GB. [2021-02-19 17:25:17,607 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 369.1 MB. Free memory was 350.6 MB in the beginning and 350.5 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.34 ms. Allocated memory is still 369.1 MB. Free memory was 349.0 MB in the beginning and 347.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.99 ms. Allocated memory is still 369.1 MB. Free memory was 347.5 MB in the beginning and 346.6 MB in the end (delta: 948.1 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 207.36 ms. Allocated memory is still 369.1 MB. Free memory was 346.5 MB in the beginning and 335.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 577754.30 ms. Allocated memory was 369.1 MB in the beginning and 926.9 MB in the end (delta: 557.8 MB). Free memory was 335.0 MB in the beginning and 854.8 MB in the end (delta: -519.8 MB). Peak memory consumption was 543.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while BasicCegarLoop was analyzing trace of length 22 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 577.6s, OverallIterations: 241, TraceHistogramMax: 5, AutomataDifference: 129.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5334 SDtfs, 15875 SDslu, 41102 SDs, 0 SdLazy, 85267 SolverSat, 2169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7860 GetRequests, 2318 SyntacticMatches, 287 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26016 ImplicationChecksByTransitivity, 132.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=189, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 240 MinimizatonAttempts, 10667 StatesRemovedByMinimization, 240 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 102.8s InterpolantComputationTime, 8681 NumberOfCodeBlocks, 8681 NumberOfCodeBlocksAsserted, 840 NumberOfCheckSat, 8202 ConstructedInterpolants, 0 QuantifiedInterpolants, 2903358 SizeOfPredicates, 1394 NumberOfNonLiveVariables, 12391 ConjunctsInSsa, 5771 ConjunctsInUnsatCore, 479 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3694 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown