/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/popl20/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:20:38,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:20:38,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:20:38,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:20:38,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:20:38,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:20:38,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:20:38,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:20:38,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:20:38,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:20:38,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:20:38,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:20:38,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:20:38,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:20:38,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:20:38,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:20:38,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:20:38,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:20:38,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:20:38,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:20:38,938 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 18:20:38,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:20:38,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:20:38,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:20:38,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:20:38,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:20:38,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:20:38,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:20:38,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:20:38,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:20:38,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:20:38,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:20:38,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:20:38,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:20:38,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:20:38,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:20:38,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:20:38,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:20:39,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:20:39,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:20:39,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:20:39,218 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:20:39,220 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:20:39,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-02-19 18:20:39,221 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-02-19 18:20:39,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:20:39,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:20:39,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:20:39,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:20:39,246 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:20:39,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:20:39,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:20:39,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:20:39,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:20:39,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/1) ... [2021-02-19 18:20:39,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:20:39,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:20:39,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:20:39,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:20:39,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (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 18:20:39,338 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:20:39,338 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:20:39,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:20:39,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:20:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:20:39,339 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:20:39,339 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:20:39,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:20:39,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:20:39,340 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 18:20:39,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:20:39,514 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:20:39,519 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:20:39 BoogieIcfgContainer [2021-02-19 18:20:39,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:20:39,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:20:39,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:20:39,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:20:39,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:20:39" (1/2) ... [2021-02-19 18:20:39,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d021c8 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:20:39, skipping insertion in model container [2021-02-19 18:20:39,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:20:39" (2/2) ... [2021-02-19 18:20:39,537 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-02-19 18:20:39,540 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:20:39,540 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:20:39,543 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:20:39,543 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:20:39,580 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 18:20:39,593 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 18:20:39,605 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:20:39,605 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:20:39,605 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:20:39,605 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:20:39,606 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:20:39,606 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:20:39,606 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:20:39,606 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:20:39,611 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-02-19 18:20:39,619 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 18:20:39,632 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:39,632 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:39,632 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:39,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1374225361, now seen corresponding path program 1 times [2021-02-19 18:20:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:39,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215130744] [2021-02-19 18:20:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:39,768 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 18:20:39,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215130744] [2021-02-19 18:20:39,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:39,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:20:39,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192067408] [2021-02-19 18:20:39,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:39,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:39,786 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 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 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:39,836 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-02-19 18:20:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 18:20:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:39,844 INFO L225 Difference]: With dead ends: 43 [2021-02-19 18:20:39,845 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 18:20:39,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:20:39,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 18:20:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-02-19 18:20:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-02-19 18:20:39,885 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-02-19 18:20:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:39,885 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-02-19 18:20:39,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-02-19 18:20:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 18:20:39,886 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:39,887 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:39,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:20:39,887 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:39,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:39,889 INFO L82 PathProgramCache]: Analyzing trace with hash -821183635, now seen corresponding path program 1 times [2021-02-19 18:20:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:39,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420523612] [2021-02-19 18:20:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:20:39,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420523612] [2021-02-19 18:20:39,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:39,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:39,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571222688] [2021-02-19 18:20:39,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:39,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:39,937 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 18:20:39,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:39,955 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-02-19 18:20:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 17 [2021-02-19 18:20:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:39,958 INFO L225 Difference]: With dead ends: 50 [2021-02-19 18:20:39,958 INFO L226 Difference]: Without dead ends: 50 [2021-02-19 18:20:39,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:20:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-19 18:20:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-02-19 18:20:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-02-19 18:20:39,963 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-02-19 18:20:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:39,964 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-02-19 18:20:39,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 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 18:20:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-02-19 18:20:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:20:39,964 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:39,965 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:39,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:20:39,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:39,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:39,965 INFO L82 PathProgramCache]: Analyzing trace with hash 193855083, now seen corresponding path program 1 times [2021-02-19 18:20:39,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:39,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797155170] [2021-02-19 18:20:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:40,208 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 18:20:40,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797155170] [2021-02-19 18:20:40,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752579852] [2021-02-19 18:20:40,210 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 18:20:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:40,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:20:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:40,513 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 18:20:40,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:40,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:20:40,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023968153] [2021-02-19 18:20:40,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:20:40,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:20:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:20:40,515 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:40,660 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-02-19 18:20:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:20:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:20:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:40,665 INFO L225 Difference]: With dead ends: 108 [2021-02-19 18:20:40,667 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 18:20:40,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:20:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 18:20:40,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-02-19 18:20:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 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 18:20:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-02-19 18:20:40,682 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-02-19 18:20:40,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:40,684 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-02-19 18:20:40,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-02-19 18:20:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:20:40,685 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:40,685 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:40,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 18:20:40,902 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:40,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:40,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1243228915, now seen corresponding path program 2 times [2021-02-19 18:20:40,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:40,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980208853] [2021-02-19 18:20:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:41,054 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 18:20:41,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980208853] [2021-02-19 18:20:41,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491625450] [2021-02-19 18:20:41,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:41,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:20:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:20:41,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:41,269 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 18:20:41,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:41,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:20:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879592161] [2021-02-19 18:20:41,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:20:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:20:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:20:41,271 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:41,567 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-02-19 18:20:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:20:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:20:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:41,571 INFO L225 Difference]: With dead ends: 130 [2021-02-19 18:20:41,571 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 18:20:41,572 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:20:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 18:20:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-02-19 18:20:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-02-19 18:20:41,579 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-02-19 18:20:41,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:41,579 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-02-19 18:20:41,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:41,579 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-02-19 18:20:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:20:41,579 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:41,579 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:41,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:41,797 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:41,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1893297885, now seen corresponding path program 3 times [2021-02-19 18:20:41,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:41,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295967167] [2021-02-19 18:20:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:41,954 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 18:20:41,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295967167] [2021-02-19 18:20:41,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790190796] [2021-02-19 18:20:41,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:41,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:20:41,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:41,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 18:20:41,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:42,139 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 18:20:42,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:42,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 18:20:42,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799705301] [2021-02-19 18:20:42,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 18:20:42,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 18:20:42,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-02-19 18:20:42,140 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:42,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:42,331 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-02-19 18:20:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 18:20:42,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:20:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:42,332 INFO L225 Difference]: With dead ends: 90 [2021-02-19 18:20:42,332 INFO L226 Difference]: Without dead ends: 83 [2021-02-19 18:20:42,332 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:20:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-02-19 18:20:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-02-19 18:20:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 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 18:20:42,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-02-19 18:20:42,336 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-02-19 18:20:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:42,336 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-02-19 18:20:42,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-02-19 18:20:42,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:42,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:42,337 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:42,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:42,546 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:42,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1215753897, now seen corresponding path program 4 times [2021-02-19 18:20:42,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:42,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025043453] [2021-02-19 18:20:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:42,794 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 18:20:42,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025043453] [2021-02-19 18:20:42,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508998775] [2021-02-19 18:20:42,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:20:42,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:20:42,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:42,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:43,060 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 18:20:43,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:43,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:43,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853865973] [2021-02-19 18:20:43,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:43,061 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:43,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:43,384 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-02-19 18:20:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 18:20:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:43,386 INFO L225 Difference]: With dead ends: 117 [2021-02-19 18:20:43,387 INFO L226 Difference]: Without dead ends: 103 [2021-02-19 18:20:43,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:20:43,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-02-19 18:20:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-02-19 18:20:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-02-19 18:20:43,395 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-02-19 18:20:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:43,395 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-02-19 18:20:43,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-02-19 18:20:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:43,396 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:43,396 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:43,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:43,602 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2029839567, now seen corresponding path program 5 times [2021-02-19 18:20:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:43,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277005152] [2021-02-19 18:20:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:43,780 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 18:20:43,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277005152] [2021-02-19 18:20:43,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387789169] [2021-02-19 18:20:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:43,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:20:43,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:43,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:43,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:44,018 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 18:20:44,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:44,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:44,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375631483] [2021-02-19 18:20:44,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:44,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:44,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:44,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:44,019 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:44,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:44,342 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-02-19 18:20:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:20:44,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:44,343 INFO L225 Difference]: With dead ends: 133 [2021-02-19 18:20:44,343 INFO L226 Difference]: Without dead ends: 126 [2021-02-19 18:20:44,344 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:20:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-02-19 18:20:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-02-19 18:20:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 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 18:20:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-02-19 18:20:44,347 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-02-19 18:20:44,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:44,348 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-02-19 18:20:44,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:44,348 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-02-19 18:20:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:44,348 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:44,349 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:44,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 18:20:44,564 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1379770597, now seen corresponding path program 6 times [2021-02-19 18:20:44,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:44,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003507465] [2021-02-19 18:20:44,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:44,749 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 18:20:44,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003507465] [2021-02-19 18:20:44,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740807389] [2021-02-19 18:20:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:44,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:20:44,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:45,017 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 18:20:45,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:45,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:45,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149944198] [2021-02-19 18:20:45,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:45,020 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:45,392 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-02-19 18:20:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:20:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:45,393 INFO L225 Difference]: With dead ends: 113 [2021-02-19 18:20:45,393 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 18:20:45,393 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:20:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 18:20:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-02-19 18:20:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-02-19 18:20:45,397 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-02-19 18:20:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:45,397 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-02-19 18:20:45,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-02-19 18:20:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:45,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:45,398 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:45,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:45,606 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1367486075, now seen corresponding path program 7 times [2021-02-19 18:20:45,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:45,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190445125] [2021-02-19 18:20:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190445125] [2021-02-19 18:20:45,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502842320] [2021-02-19 18:20:45,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:45,981 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 18:20:45,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:45,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:45,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375913617] [2021-02-19 18:20:45,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:45,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:45,986 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:46,335 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-02-19 18:20:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 18:20:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:46,336 INFO L225 Difference]: With dead ends: 176 [2021-02-19 18:20:46,336 INFO L226 Difference]: Without dead ends: 162 [2021-02-19 18:20:46,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:20:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-02-19 18:20:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-02-19 18:20:46,339 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 18:20:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-02-19 18:20:46,340 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-02-19 18:20:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:46,340 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-02-19 18:20:46,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-02-19 18:20:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:46,341 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:46,341 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:46,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:46,554 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2017555045, now seen corresponding path program 8 times [2021-02-19 18:20:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:46,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879841927] [2021-02-19 18:20:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:46,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879841927] [2021-02-19 18:20:46,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967112094] [2021-02-19 18:20:46,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:46,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:20:46,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:46,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:46,890 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 18:20:46,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:46,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821198573] [2021-02-19 18:20:46,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:46,892 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:47,239 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-02-19 18:20:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:20:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:47,241 INFO L225 Difference]: With dead ends: 163 [2021-02-19 18:20:47,241 INFO L226 Difference]: Without dead ends: 149 [2021-02-19 18:20:47,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:20:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-02-19 18:20:47,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-02-19 18:20:47,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:47,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-02-19 18:20:47,244 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-02-19 18:20:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:47,244 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-02-19 18:20:47,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-02-19 18:20:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:47,244 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:47,244 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:47,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 18:20:47,458 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:47,459 INFO L82 PathProgramCache]: Analyzing trace with hash -43304757, now seen corresponding path program 9 times [2021-02-19 18:20:47,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:47,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553306680] [2021-02-19 18:20:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553306680] [2021-02-19 18:20:47,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626036704] [2021-02-19 18:20:47,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:47,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:20:47,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:47,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:47,780 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 18:20:47,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:47,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:47,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434865004] [2021-02-19 18:20:47,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:47,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:47,781 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:47,991 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-02-19 18:20:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:20:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:47,992 INFO L225 Difference]: With dead ends: 104 [2021-02-19 18:20:47,992 INFO L226 Difference]: Without dead ends: 90 [2021-02-19 18:20:47,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:20:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-02-19 18:20:48,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-02-19 18:20:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-02-19 18:20:48,005 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-02-19 18:20:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:48,005 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-02-19 18:20:48,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-02-19 18:20:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:48,009 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:48,009 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:48,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:48,218 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash -883380427, now seen corresponding path program 10 times [2021-02-19 18:20:48,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:48,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605230723] [2021-02-19 18:20:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:48,322 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 18:20:48,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605230723] [2021-02-19 18:20:48,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452714541] [2021-02-19 18:20:48,322 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 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 18:20:48,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:20:48,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:48,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:48,522 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 18:20:48,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:48,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:48,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777376129] [2021-02-19 18:20:48,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:48,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:48,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:48,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:48,523 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:48,988 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-02-19 18:20:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:20:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:48,989 INFO L225 Difference]: With dead ends: 171 [2021-02-19 18:20:48,990 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 18:20:48,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 18:20:48,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 18:20:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-02-19 18:20:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-02-19 18:20:48,993 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-02-19 18:20:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:48,993 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-02-19 18:20:48,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-02-19 18:20:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:48,993 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:48,993 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:49,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:49,206 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:49,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:49,206 INFO L82 PathProgramCache]: Analyzing trace with hash -233311457, now seen corresponding path program 11 times [2021-02-19 18:20:49,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:49,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477377555] [2021-02-19 18:20:49,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:49,313 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 18:20:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477377555] [2021-02-19 18:20:49,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737832729] [2021-02-19 18:20:49,314 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:49,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:20:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:49,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:49,542 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 18:20:49,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:49,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:49,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811402985] [2021-02-19 18:20:49,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:49,543 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:50,083 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-02-19 18:20:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:20:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:50,084 INFO L225 Difference]: With dead ends: 171 [2021-02-19 18:20:50,084 INFO L226 Difference]: Without dead ends: 157 [2021-02-19 18:20:50,084 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:20:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-19 18:20:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-02-19 18:20:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 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 18:20:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-02-19 18:20:50,087 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-02-19 18:20:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:50,087 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-02-19 18:20:50,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-02-19 18:20:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:50,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:50,088 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:50,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:20:50,302 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2000796037, now seen corresponding path program 12 times [2021-02-19 18:20:50,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:50,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773553027] [2021-02-19 18:20:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:50,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:50,407 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 18:20:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773553027] [2021-02-19 18:20:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448856482] [2021-02-19 18:20:50,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:50,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:20:50,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:50,638 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 18:20:50,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:50,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976434260] [2021-02-19 18:20:50,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:50,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:50,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:50,640 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:51,096 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-02-19 18:20:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:20:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:51,097 INFO L225 Difference]: With dead ends: 139 [2021-02-19 18:20:51,097 INFO L226 Difference]: Without dead ends: 125 [2021-02-19 18:20:51,098 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:20:51,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-19 18:20:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-02-19 18:20:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-02-19 18:20:51,100 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-02-19 18:20:51,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:51,100 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-02-19 18:20:51,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-02-19 18:20:51,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 18:20:51,101 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:51,101 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:51,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 18:20:51,306 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:51,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1465566235, now seen corresponding path program 13 times [2021-02-19 18:20:51,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:51,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508270589] [2021-02-19 18:20:51,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:51,400 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 18:20:51,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508270589] [2021-02-19 18:20:51,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832652581] [2021-02-19 18:20:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:51,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:20:51,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:51,609 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 18:20:51,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:51,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 18:20:51,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625578651] [2021-02-19 18:20:51,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 18:20:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:51,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 18:20:51,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:20:51,610 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:51,901 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-02-19 18:20:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:20:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 18:20:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:51,902 INFO L225 Difference]: With dead ends: 124 [2021-02-19 18:20:51,902 INFO L226 Difference]: Without dead ends: 92 [2021-02-19 18:20:51,903 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:20:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-02-19 18:20:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-02-19 18:20:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-02-19 18:20:51,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-02-19 18:20:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:51,905 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-02-19 18:20:51,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-02-19 18:20:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:51,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:51,906 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:52,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:20:52,114 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:52,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash -286996633, now seen corresponding path program 14 times [2021-02-19 18:20:52,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:52,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324053956] [2021-02-19 18:20:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:52,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324053956] [2021-02-19 18:20:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637974860] [2021-02-19 18:20:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:52,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:20:52,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:52,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:20:52,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:52,509 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 18:20:52,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:52,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:20:52,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196371543] [2021-02-19 18:20:52,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:20:52,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:52,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:20:52,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:20:52,511 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:52,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:52,782 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-02-19 18:20:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 18:20:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:20:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:52,783 INFO L225 Difference]: With dead ends: 120 [2021-02-19 18:20:52,783 INFO L226 Difference]: Without dead ends: 106 [2021-02-19 18:20:52,783 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:20:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-02-19 18:20:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-02-19 18:20:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 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 18:20:52,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-02-19 18:20:52,785 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-02-19 18:20:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:52,785 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-02-19 18:20:52,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-02-19 18:20:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:52,785 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:52,785 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:52,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:52,994 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash -814263641, now seen corresponding path program 15 times [2021-02-19 18:20:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:52,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272734844] [2021-02-19 18:20:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:53,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272734844] [2021-02-19 18:20:53,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624147721] [2021-02-19 18:20:53,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:53,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:20:53,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:53,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:20:53,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:53,354 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 18:20:53,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:53,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:20:53,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703238679] [2021-02-19 18:20:53,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:20:53,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:53,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:20:53,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:20:53,355 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:54,274 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-02-19 18:20:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:20:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:20:54,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:54,276 INFO L225 Difference]: With dead ends: 225 [2021-02-19 18:20:54,276 INFO L226 Difference]: Without dead ends: 175 [2021-02-19 18:20:54,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:20:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-02-19 18:20:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-02-19 18:20:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-02-19 18:20:54,279 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-02-19 18:20:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:54,279 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-02-19 18:20:54,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-02-19 18:20:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:54,280 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:54,280 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:54,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:20:54,490 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:54,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1683325649, now seen corresponding path program 16 times [2021-02-19 18:20:54,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:54,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161426551] [2021-02-19 18:20:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161426551] [2021-02-19 18:20:54,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747331123] [2021-02-19 18:20:54,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:54,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:20:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:54,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:20:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:54,942 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 18:20:54,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:54,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:20:54,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993615301] [2021-02-19 18:20:54,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:20:54,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:20:54,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:20:54,943 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:56,303 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-02-19 18:20:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:20:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:20:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:56,305 INFO L225 Difference]: With dead ends: 293 [2021-02-19 18:20:56,305 INFO L226 Difference]: Without dead ends: 254 [2021-02-19 18:20:56,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:20:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-02-19 18:20:56,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-02-19 18:20:56,308 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 18:20:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-02-19 18:20:56,309 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-02-19 18:20:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:56,309 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-02-19 18:20:56,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-02-19 18:20:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:56,309 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:56,309 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:56,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:20:56,522 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:56,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1346713787, now seen corresponding path program 17 times [2021-02-19 18:20:56,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:56,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718057965] [2021-02-19 18:20:56,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:56,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718057965] [2021-02-19 18:20:56,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335167697] [2021-02-19 18:20:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:56,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:20:56,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:56,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:20:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:56,970 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 18:20:56,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:56,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:20:56,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344381578] [2021-02-19 18:20:56,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:20:56,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:56,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:20:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:20:56,971 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:58,136 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-02-19 18:20:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:20:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:20:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:58,137 INFO L225 Difference]: With dead ends: 263 [2021-02-19 18:20:58,137 INFO L226 Difference]: Without dead ends: 236 [2021-02-19 18:20:58,138 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:20:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-02-19 18:20:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-02-19 18:20:58,140 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 18:20:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-02-19 18:20:58,141 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-02-19 18:20:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:58,141 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-02-19 18:20:58,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-02-19 18:20:58,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:58,141 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:58,141 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:58,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:58,348 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:20:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1812068237, now seen corresponding path program 18 times [2021-02-19 18:20:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:58,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274389517] [2021-02-19 18:20:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274389517] [2021-02-19 18:20:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87331651] [2021-02-19 18:20:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:20:58,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:20:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:20:58,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:20:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:20:58,728 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 18:20:58,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:20:58,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:20:58,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254592757] [2021-02-19 18:20:58,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:20:58,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:58,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:20:58,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:20:58,729 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:59,960 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-02-19 18:20:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:20:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:20:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:59,961 INFO L225 Difference]: With dead ends: 280 [2021-02-19 18:20:59,961 INFO L226 Difference]: Without dead ends: 256 [2021-02-19 18:20:59,962 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=551, Invalid=2871, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:20:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-02-19 18:20:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-02-19 18:20:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 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 18:20:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-02-19 18:20:59,965 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-02-19 18:20:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:59,965 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-02-19 18:20:59,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:20:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-02-19 18:20:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:20:59,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:20:59,966 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:00,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:00,174 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1161999267, now seen corresponding path program 19 times [2021-02-19 18:21:00,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:00,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117497296] [2021-02-19 18:21:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117497296] [2021-02-19 18:21:00,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585625496] [2021-02-19 18:21:00,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:00,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:21:00,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:00,587 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 18:21:00,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:00,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43458094] [2021-02-19 18:21:00,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:00,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:00,588 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:01,803 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-02-19 18:21:01,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:21:01,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:01,805 INFO L225 Difference]: With dead ends: 241 [2021-02-19 18:21:01,805 INFO L226 Difference]: Without dead ends: 220 [2021-02-19 18:21:01,806 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=544, Invalid=2762, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:21:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-02-19 18:21:01,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-02-19 18:21:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-02-19 18:21:01,809 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-02-19 18:21:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:01,809 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-02-19 18:21:01,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-02-19 18:21:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:21:01,809 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:01,809 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:02,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:02,022 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:02,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1028528647, now seen corresponding path program 20 times [2021-02-19 18:21:02,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050420169] [2021-02-19 18:21:02,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:02,212 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 18:21:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050420169] [2021-02-19 18:21:02,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187096713] [2021-02-19 18:21:02,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:02,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:21:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:02,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:21:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:02,459 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 18:21:02,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:02,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148755326] [2021-02-19 18:21:02,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:02,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:02,460 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:03,985 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-02-19 18:21:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:21:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:03,987 INFO L225 Difference]: With dead ends: 342 [2021-02-19 18:21:03,987 INFO L226 Difference]: Without dead ends: 300 [2021-02-19 18:21:03,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:21:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-02-19 18:21:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-02-19 18:21:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-02-19 18:21:03,991 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-02-19 18:21:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:03,991 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-02-19 18:21:03,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-02-19 18:21:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:21:03,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:03,992 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:04,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 18:21:04,206 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash 2001510789, now seen corresponding path program 21 times [2021-02-19 18:21:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:04,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991727505] [2021-02-19 18:21:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:04,385 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 18:21:04,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991727505] [2021-02-19 18:21:04,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845033643] [2021-02-19 18:21:04,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:04,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:21:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 18:21:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:04,654 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 18:21:04,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:04,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:04,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699319961] [2021-02-19 18:21:04,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:04,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:04,656 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:06,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:06,300 INFO L93 Difference]: Finished difference Result 342 states and 659 transitions. [2021-02-19 18:21:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:21:06,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:06,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:06,302 INFO L225 Difference]: With dead ends: 342 [2021-02-19 18:21:06,302 INFO L226 Difference]: Without dead ends: 312 [2021-02-19 18:21:06,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=593, Invalid=2947, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:21:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-02-19 18:21:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 150. [2021-02-19 18:21:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2550335570469797) internal successors, (336), 149 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 336 transitions. [2021-02-19 18:21:06,307 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 336 transitions. Word has length 23 [2021-02-19 18:21:06,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:06,307 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 336 transitions. [2021-02-19 18:21:06,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:06,307 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 336 transitions. [2021-02-19 18:21:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:21:06,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:06,308 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:06,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 18:21:06,522 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:06,522 INFO L82 PathProgramCache]: Analyzing trace with hash 586889323, now seen corresponding path program 22 times [2021-02-19 18:21:06,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:06,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018572367] [2021-02-19 18:21:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:06,698 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 18:21:06,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018572367] [2021-02-19 18:21:06,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6180281] [2021-02-19 18:21:06,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:21:06,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:21:06,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:06,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:21:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:06,972 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 18:21:06,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:06,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:06,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003873209] [2021-02-19 18:21:06,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:06,973 INFO L87 Difference]: Start difference. First operand 150 states and 336 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:08,108 INFO L93 Difference]: Finished difference Result 338 states and 691 transitions. [2021-02-19 18:21:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:21:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:08,110 INFO L225 Difference]: With dead ends: 338 [2021-02-19 18:21:08,110 INFO L226 Difference]: Without dead ends: 324 [2021-02-19 18:21:08,110 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=503, Invalid=2253, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:21:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-02-19 18:21:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 178. [2021-02-19 18:21:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2937853107344632) internal successors, (406), 177 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 406 transitions. [2021-02-19 18:21:08,114 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 406 transitions. Word has length 23 [2021-02-19 18:21:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:08,114 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 406 transitions. [2021-02-19 18:21:08,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 406 transitions. [2021-02-19 18:21:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:21:08,114 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:08,114 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:08,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:08,329 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 423537527, now seen corresponding path program 23 times [2021-02-19 18:21:08,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:08,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078247271] [2021-02-19 18:21:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:08,465 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 18:21:08,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078247271] [2021-02-19 18:21:08,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828372604] [2021-02-19 18:21:08,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:08,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:21:08,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:08,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:21:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:08,700 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 18:21:08,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:08,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:08,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81009328] [2021-02-19 18:21:08,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:08,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:08,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:08,701 INFO L87 Difference]: Start difference. First operand 178 states and 406 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:09,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:09,971 INFO L93 Difference]: Finished difference Result 448 states and 939 transitions. [2021-02-19 18:21:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:21:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:09,973 INFO L225 Difference]: With dead ends: 448 [2021-02-19 18:21:09,973 INFO L226 Difference]: Without dead ends: 410 [2021-02-19 18:21:09,974 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:21:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-02-19 18:21:09,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 209. [2021-02-19 18:21:09,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3461538461538463) internal successors, (488), 208 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:09,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 488 transitions. [2021-02-19 18:21:09,978 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 488 transitions. Word has length 23 [2021-02-19 18:21:09,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:09,978 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 488 transitions. [2021-02-19 18:21:09,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:09,979 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 488 transitions. [2021-02-19 18:21:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 18:21:09,979 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:09,979 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:10,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 18:21:10,194 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:10,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1281899805, now seen corresponding path program 24 times [2021-02-19 18:21:10,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:10,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798685788] [2021-02-19 18:21:10,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:10,327 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 18:21:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798685788] [2021-02-19 18:21:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217092473] [2021-02-19 18:21:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:10,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:21:10,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:10,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 18:21:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:10,577 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 18:21:10,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:10,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-02-19 18:21:10,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976457993] [2021-02-19 18:21:10,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:21:10,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:21:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:21:10,578 INFO L87 Difference]: Start difference. First operand 209 states and 488 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:11,699 INFO L93 Difference]: Finished difference Result 425 states and 927 transitions. [2021-02-19 18:21:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:21:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 18:21:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:11,701 INFO L225 Difference]: With dead ends: 425 [2021-02-19 18:21:11,701 INFO L226 Difference]: Without dead ends: 411 [2021-02-19 18:21:11,702 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:21:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-19 18:21:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 225. [2021-02-19 18:21:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.375) internal successors, (532), 224 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 532 transitions. [2021-02-19 18:21:11,706 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 532 transitions. Word has length 23 [2021-02-19 18:21:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:11,706 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 532 transitions. [2021-02-19 18:21:11,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 532 transitions. [2021-02-19 18:21:11,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:11,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:11,707 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:11,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:11,907 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1051369015, now seen corresponding path program 25 times [2021-02-19 18:21:11,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:11,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906518568] [2021-02-19 18:21:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:12,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906518568] [2021-02-19 18:21:12,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598073783] [2021-02-19 18:21:12,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:12,055 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:12,294 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 18:21:12,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:12,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:12,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421310313] [2021-02-19 18:21:12,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:12,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:12,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:12,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:12,296 INFO L87 Difference]: Start difference. First operand 225 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:13,127 INFO L93 Difference]: Finished difference Result 478 states and 1023 transitions. [2021-02-19 18:21:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:21:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:13,129 INFO L225 Difference]: With dead ends: 478 [2021-02-19 18:21:13,129 INFO L226 Difference]: Without dead ends: 457 [2021-02-19 18:21:13,129 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:21:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-02-19 18:21:13,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 260. [2021-02-19 18:21:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:13,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-02-19 18:21:13,134 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-02-19 18:21:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:13,134 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-02-19 18:21:13,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-02-19 18:21:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:13,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:13,135 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:13,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:21:13,349 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:13,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1701437985, now seen corresponding path program 26 times [2021-02-19 18:21:13,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:13,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636837641] [2021-02-19 18:21:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:13,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636837641] [2021-02-19 18:21:13,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597579591] [2021-02-19 18:21:13,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:21:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:21:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:13,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:13,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:13,756 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 18:21:13,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:13,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:13,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464767865] [2021-02-19 18:21:13,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:13,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:13,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:13,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:13,758 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:14,798 INFO L93 Difference]: Finished difference Result 487 states and 1030 transitions. [2021-02-19 18:21:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-02-19 18:21:14,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:14,799 INFO L225 Difference]: With dead ends: 487 [2021-02-19 18:21:14,799 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 18:21:14,800 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:21:14,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 18:21:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 260. [2021-02-19 18:21:14,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.4208494208494207) internal successors, (627), 259 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 627 transitions. [2021-02-19 18:21:14,805 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 627 transitions. Word has length 25 [2021-02-19 18:21:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:14,805 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 627 transitions. [2021-02-19 18:21:14,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 627 transitions. [2021-02-19 18:21:14,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:14,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:14,806 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:15,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:15,020 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash -359421817, now seen corresponding path program 27 times [2021-02-19 18:21:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:15,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201177999] [2021-02-19 18:21:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201177999] [2021-02-19 18:21:15,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755144185] [2021-02-19 18:21:15,153 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 18:21:15,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:21:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:15,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:15,430 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 18:21:15,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:15,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:15,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776487670] [2021-02-19 18:21:15,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:15,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:15,431 INFO L87 Difference]: Start difference. First operand 260 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:16,266 INFO L93 Difference]: Finished difference Result 352 states and 772 transitions. [2021-02-19 18:21:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:21:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:16,268 INFO L225 Difference]: With dead ends: 352 [2021-02-19 18:21:16,268 INFO L226 Difference]: Without dead ends: 331 [2021-02-19 18:21:16,268 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:21:16,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-02-19 18:21:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 262. [2021-02-19 18:21:16,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.413793103448276) internal successors, (630), 261 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 630 transitions. [2021-02-19 18:21:16,272 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 630 transitions. Word has length 25 [2021-02-19 18:21:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:16,272 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 630 transitions. [2021-02-19 18:21:16,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 630 transitions. [2021-02-19 18:21:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:16,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:16,273 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:16,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:21:16,488 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:16,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:16,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1746379497, now seen corresponding path program 28 times [2021-02-19 18:21:16,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:16,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272592222] [2021-02-19 18:21:16,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:16,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272592222] [2021-02-19 18:21:16,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851517170] [2021-02-19 18:21:16,597 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 18:21:16,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:21:16,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:16,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:16,846 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 18:21:16,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:16,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:16,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037983858] [2021-02-19 18:21:16,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:16,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:16,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:16,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:16,847 INFO L87 Difference]: Start difference. First operand 262 states and 630 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:18,175 INFO L93 Difference]: Finished difference Result 717 states and 1516 transitions. [2021-02-19 18:21:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:21:18,176 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:18,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:18,178 INFO L225 Difference]: With dead ends: 717 [2021-02-19 18:21:18,178 INFO L226 Difference]: Without dead ends: 676 [2021-02-19 18:21:18,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:21:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-02-19 18:21:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 377. [2021-02-19 18:21:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.5) internal successors, (940), 376 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 940 transitions. [2021-02-19 18:21:18,185 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 940 transitions. Word has length 25 [2021-02-19 18:21:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:18,185 INFO L480 AbstractCegarLoop]: Abstraction has 377 states and 940 transitions. [2021-02-19 18:21:18,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 940 transitions. [2021-02-19 18:21:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:18,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:18,185 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:18,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:18,390 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1898518829, now seen corresponding path program 29 times [2021-02-19 18:21:18,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:18,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916253526] [2021-02-19 18:21:18,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916253526] [2021-02-19 18:21:18,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203067046] [2021-02-19 18:21:18,504 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) [2021-02-19 18:21:18,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:21:18,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:18,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:18,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:18,782 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 18:21:18,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:18,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:18,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627272881] [2021-02-19 18:21:18,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:18,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:18,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:18,783 INFO L87 Difference]: Start difference. First operand 377 states and 940 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:20,130 INFO L93 Difference]: Finished difference Result 681 states and 1442 transitions. [2021-02-19 18:21:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:21:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:20,132 INFO L225 Difference]: With dead ends: 681 [2021-02-19 18:21:20,132 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 18:21:20,133 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:21:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 18:21:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 338. [2021-02-19 18:21:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4391691394658754) internal successors, (822), 337 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 822 transitions. [2021-02-19 18:21:20,138 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 822 transitions. Word has length 25 [2021-02-19 18:21:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:20,138 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 822 transitions. [2021-02-19 18:21:20,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 822 transitions. [2021-02-19 18:21:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:20,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:20,139 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:20,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:21:20,353 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:20,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash 335588665, now seen corresponding path program 30 times [2021-02-19 18:21:20,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:20,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592737706] [2021-02-19 18:21:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:20,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592737706] [2021-02-19 18:21:20,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036625846] [2021-02-19 18:21:20,471 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 18:21:20,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:21:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:20,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:20,743 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 18:21:20,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:20,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:20,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12619787] [2021-02-19 18:21:20,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:20,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:20,744 INFO L87 Difference]: Start difference. First operand 338 states and 822 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:21,577 INFO L93 Difference]: Finished difference Result 462 states and 1027 transitions. [2021-02-19 18:21:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:21:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:21,578 INFO L225 Difference]: With dead ends: 462 [2021-02-19 18:21:21,578 INFO L226 Difference]: Without dead ends: 441 [2021-02-19 18:21:21,579 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:21:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-02-19 18:21:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 325. [2021-02-19 18:21:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4382716049382718) internal successors, (790), 324 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 790 transitions. [2021-02-19 18:21:21,583 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 790 transitions. Word has length 25 [2021-02-19 18:21:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:21,583 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 790 transitions. [2021-02-19 18:21:21,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 790 transitions. [2021-02-19 18:21:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:21,584 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:21,584 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:21,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:21,797 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 733686965, now seen corresponding path program 31 times [2021-02-19 18:21:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:21,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134243817] [2021-02-19 18:21:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:21,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134243817] [2021-02-19 18:21:21,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067012671] [2021-02-19 18:21:21,909 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 18:21:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:21,925 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:22,159 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 18:21:22,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:22,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834274381] [2021-02-19 18:21:22,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:22,160 INFO L87 Difference]: Start difference. First operand 325 states and 790 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:23,764 INFO L93 Difference]: Finished difference Result 880 states and 1876 transitions. [2021-02-19 18:21:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:21:23,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:23,767 INFO L225 Difference]: With dead ends: 880 [2021-02-19 18:21:23,767 INFO L226 Difference]: Without dead ends: 836 [2021-02-19 18:21:23,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 18:21:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-02-19 18:21:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 447. [2021-02-19 18:21:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.5515695067264574) internal successors, (1138), 446 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1138 transitions. [2021-02-19 18:21:23,775 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1138 transitions. Word has length 25 [2021-02-19 18:21:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:23,775 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1138 transitions. [2021-02-19 18:21:23,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1138 transitions. [2021-02-19 18:21:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:23,776 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:23,776 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:23,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:21:23,990 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:23,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1383755935, now seen corresponding path program 32 times [2021-02-19 18:21:23,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:23,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438662073] [2021-02-19 18:21:23,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:24,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438662073] [2021-02-19 18:21:24,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766900461] [2021-02-19 18:21:24,107 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) [2021-02-19 18:21:24,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:21:24,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:24,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:24,384 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 18:21:24,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:24,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983805600] [2021-02-19 18:21:24,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:24,385 INFO L87 Difference]: Start difference. First operand 447 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:26,099 INFO L93 Difference]: Finished difference Result 844 states and 1797 transitions. [2021-02-19 18:21:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:21:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:26,102 INFO L225 Difference]: With dead ends: 844 [2021-02-19 18:21:26,102 INFO L226 Difference]: Without dead ends: 809 [2021-02-19 18:21:26,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:21:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-02-19 18:21:26,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 337. [2021-02-19 18:21:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.5) internal successors, (840), 336 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:26,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 840 transitions. [2021-02-19 18:21:26,108 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 840 transitions. Word has length 25 [2021-02-19 18:21:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:26,108 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 840 transitions. [2021-02-19 18:21:26,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 840 transitions. [2021-02-19 18:21:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:26,109 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:26,109 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:26,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 18:21:26,314 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash -677103867, now seen corresponding path program 33 times [2021-02-19 18:21:26,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:26,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315984643] [2021-02-19 18:21:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315984643] [2021-02-19 18:21:26,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491998985] [2021-02-19 18:21:26,425 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) [2021-02-19 18:21:26,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:21:26,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:26,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:26,687 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 18:21:26,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:26,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:26,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902832348] [2021-02-19 18:21:26,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:26,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:26,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:26,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:26,688 INFO L87 Difference]: Start difference. First operand 337 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:27,842 INFO L93 Difference]: Finished difference Result 539 states and 1176 transitions. [2021-02-19 18:21:27,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:21:27,842 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:27,843 INFO L225 Difference]: With dead ends: 539 [2021-02-19 18:21:27,843 INFO L226 Difference]: Without dead ends: 518 [2021-02-19 18:21:27,844 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:21:27,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-02-19 18:21:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 336. [2021-02-19 18:21:27,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.5194029850746267) internal successors, (844), 335 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:27,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 844 transitions. [2021-02-19 18:21:27,848 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 844 transitions. Word has length 25 [2021-02-19 18:21:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:27,848 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 844 transitions. [2021-02-19 18:21:27,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:27,849 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 844 transitions. [2021-02-19 18:21:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:27,849 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:27,849 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:28,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:21:28,058 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1212333669, now seen corresponding path program 34 times [2021-02-19 18:21:28,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:28,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974676496] [2021-02-19 18:21:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974676496] [2021-02-19 18:21:28,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544616979] [2021-02-19 18:21:28,167 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 18:21:28,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:21:28,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:28,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:28,431 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 18:21:28,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:28,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663462860] [2021-02-19 18:21:28,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:28,432 INFO L87 Difference]: Start difference. First operand 336 states and 844 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:29,327 INFO L93 Difference]: Finished difference Result 477 states and 1063 transitions. [2021-02-19 18:21:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:21:29,328 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:29,329 INFO L225 Difference]: With dead ends: 477 [2021-02-19 18:21:29,329 INFO L226 Difference]: Without dead ends: 424 [2021-02-19 18:21:29,329 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:21:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-02-19 18:21:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 329. [2021-02-19 18:21:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.3780487804878048) internal successors, (780), 328 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 780 transitions. [2021-02-19 18:21:29,334 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 780 transitions. Word has length 25 [2021-02-19 18:21:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:29,334 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 780 transitions. [2021-02-19 18:21:29,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 780 transitions. [2021-02-19 18:21:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:29,334 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:29,334 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:29,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:21:29,549 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash 947305215, now seen corresponding path program 35 times [2021-02-19 18:21:29,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:29,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808166552] [2021-02-19 18:21:29,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:29,745 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 18:21:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808166552] [2021-02-19 18:21:29,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173955892] [2021-02-19 18:21:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:29,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:21:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:29,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:30,104 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 18:21:30,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:30,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 18:21:30,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650852969] [2021-02-19 18:21:30,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:30,106 INFO L87 Difference]: Start difference. First operand 329 states and 780 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:32,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:32,690 INFO L93 Difference]: Finished difference Result 585 states and 1283 transitions. [2021-02-19 18:21:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:21:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:32,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:32,692 INFO L225 Difference]: With dead ends: 585 [2021-02-19 18:21:32,692 INFO L226 Difference]: Without dead ends: 571 [2021-02-19 18:21:32,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:21:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-02-19 18:21:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 357. [2021-02-19 18:21:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.3820224719101124) internal successors, (848), 356 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 848 transitions. [2021-02-19 18:21:32,697 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 848 transitions. Word has length 25 [2021-02-19 18:21:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:32,697 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 848 transitions. [2021-02-19 18:21:32,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 848 transitions. [2021-02-19 18:21:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:32,697 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:32,697 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:32,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:21:32,906 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1198865545, now seen corresponding path program 36 times [2021-02-19 18:21:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:32,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296625292] [2021-02-19 18:21:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:33,045 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 18:21:33,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296625292] [2021-02-19 18:21:33,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596351696] [2021-02-19 18:21:33,046 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 18:21:33,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:21:33,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:33,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:33,293 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 18:21:33,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:33,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:33,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298551173] [2021-02-19 18:21:33,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:33,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:33,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:33,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:33,294 INFO L87 Difference]: Start difference. First operand 357 states and 848 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:34,264 INFO L93 Difference]: Finished difference Result 661 states and 1415 transitions. [2021-02-19 18:21:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:21:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:34,266 INFO L225 Difference]: With dead ends: 661 [2021-02-19 18:21:34,266 INFO L226 Difference]: Without dead ends: 588 [2021-02-19 18:21:34,267 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:21:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-02-19 18:21:34,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 415. [2021-02-19 18:21:34,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.314009661835749) internal successors, (958), 414 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 958 transitions. [2021-02-19 18:21:34,272 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 958 transitions. Word has length 25 [2021-02-19 18:21:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:34,272 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 958 transitions. [2021-02-19 18:21:34,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 958 transitions. [2021-02-19 18:21:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:34,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:34,273 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:34,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:21:34,482 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash -548796575, now seen corresponding path program 37 times [2021-02-19 18:21:34,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:34,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216861303] [2021-02-19 18:21:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:34,612 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 18:21:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216861303] [2021-02-19 18:21:34,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937241644] [2021-02-19 18:21:34,612 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 18:21:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:34,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:34,898 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 18:21:34,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:34,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:34,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897909322] [2021-02-19 18:21:34,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:34,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:34,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:34,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:34,900 INFO L87 Difference]: Start difference. First operand 415 states and 958 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:35,983 INFO L93 Difference]: Finished difference Result 646 states and 1353 transitions. [2021-02-19 18:21:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:21:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:35,985 INFO L225 Difference]: With dead ends: 646 [2021-02-19 18:21:35,985 INFO L226 Difference]: Without dead ends: 625 [2021-02-19 18:21:35,985 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 18:21:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-02-19 18:21:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 416. [2021-02-19 18:21:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.3180722891566266) internal successors, (962), 415 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 962 transitions. [2021-02-19 18:21:35,990 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 962 transitions. Word has length 25 [2021-02-19 18:21:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:35,991 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 962 transitions. [2021-02-19 18:21:35,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 962 transitions. [2021-02-19 18:21:35,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:35,991 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:35,991 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:36,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-02-19 18:21:36,206 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1685310919, now seen corresponding path program 38 times [2021-02-19 18:21:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:36,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748652000] [2021-02-19 18:21:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:36,329 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 18:21:36,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748652000] [2021-02-19 18:21:36,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053337032] [2021-02-19 18:21:36,330 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) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:36,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:21:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:36,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:36,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:36,599 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 18:21:36,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:36,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 18:21:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174997935] [2021-02-19 18:21:36,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 18:21:36,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:36,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 18:21:36,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-02-19 18:21:36,600 INFO L87 Difference]: Start difference. First operand 416 states and 962 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:37,332 INFO L93 Difference]: Finished difference Result 531 states and 1157 transitions. [2021-02-19 18:21:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 18:21:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:37,334 INFO L225 Difference]: With dead ends: 531 [2021-02-19 18:21:37,334 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 18:21:37,335 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1785, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:21:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 18:21:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 418. [2021-02-19 18:21:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.3141486810551557) internal successors, (965), 417 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 965 transitions. [2021-02-19 18:21:37,339 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 965 transitions. Word has length 25 [2021-02-19 18:21:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:37,339 INFO L480 AbstractCegarLoop]: Abstraction has 418 states and 965 transitions. [2021-02-19 18:21:37,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 965 transitions. [2021-02-19 18:21:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:37,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:37,340 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:37,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:37,550 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:37,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2083409219, now seen corresponding path program 39 times [2021-02-19 18:21:37,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:37,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000661165] [2021-02-19 18:21:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:37,661 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 18:21:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000661165] [2021-02-19 18:21:37,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144528637] [2021-02-19 18:21:37,661 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 18:21:37,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:21:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:37,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:37,931 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 18:21:37,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:37,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:37,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222746602] [2021-02-19 18:21:37,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:37,932 INFO L87 Difference]: Start difference. First operand 418 states and 965 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:39,186 INFO L93 Difference]: Finished difference Result 579 states and 1222 transitions. [2021-02-19 18:21:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:21:39,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:39,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:39,188 INFO L225 Difference]: With dead ends: 579 [2021-02-19 18:21:39,188 INFO L226 Difference]: Without dead ends: 542 [2021-02-19 18:21:39,188 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=3370, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:21:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-02-19 18:21:39,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 384. [2021-02-19 18:21:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.3159268929503916) internal successors, (887), 383 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 887 transitions. [2021-02-19 18:21:39,193 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 887 transitions. Word has length 25 [2021-02-19 18:21:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:39,193 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 887 transitions. [2021-02-19 18:21:39,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 887 transitions. [2021-02-19 18:21:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:39,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:39,194 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:39,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:39,408 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1561489107, now seen corresponding path program 40 times [2021-02-19 18:21:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:39,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453191302] [2021-02-19 18:21:39,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:39,523 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 18:21:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453191302] [2021-02-19 18:21:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874374260] [2021-02-19 18:21:39,523 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 18:21:39,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:21:39,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:39,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:39,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:39,787 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 18:21:39,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:39,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:39,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285662997] [2021-02-19 18:21:39,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:39,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:39,788 INFO L87 Difference]: Start difference. First operand 384 states and 887 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:41,076 INFO L93 Difference]: Finished difference Result 535 states and 1127 transitions. [2021-02-19 18:21:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:21:41,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:41,078 INFO L225 Difference]: With dead ends: 535 [2021-02-19 18:21:41,078 INFO L226 Difference]: Without dead ends: 505 [2021-02-19 18:21:41,079 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=585, Invalid=3705, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:21:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-02-19 18:21:41,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 323. [2021-02-19 18:21:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.329192546583851) internal successors, (750), 322 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 750 transitions. [2021-02-19 18:21:41,083 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 750 transitions. Word has length 25 [2021-02-19 18:21:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:41,083 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 750 transitions. [2021-02-19 18:21:41,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 750 transitions. [2021-02-19 18:21:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:41,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:41,084 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:41,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:41,284 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:41,284 INFO L82 PathProgramCache]: Analyzing trace with hash 672618387, now seen corresponding path program 41 times [2021-02-19 18:21:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:41,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945719400] [2021-02-19 18:21:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:41,400 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 18:21:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945719400] [2021-02-19 18:21:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526395803] [2021-02-19 18:21:41,400 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 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 18:21:41,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:21:41,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:41,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 18:21:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:41,729 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 18:21:41,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:41,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:41,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426768445] [2021-02-19 18:21:41,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:41,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:41,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:41,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:41,740 INFO L87 Difference]: Start difference. First operand 323 states and 750 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:42,855 INFO L93 Difference]: Finished difference Result 466 states and 985 transitions. [2021-02-19 18:21:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:21:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:42,857 INFO L225 Difference]: With dead ends: 466 [2021-02-19 18:21:42,857 INFO L226 Difference]: Without dead ends: 445 [2021-02-19 18:21:42,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=431, Invalid=3109, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:21:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-02-19 18:21:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-02-19 18:21:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.3302180685358254) internal successors, (748), 321 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 748 transitions. [2021-02-19 18:21:42,861 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 748 transitions. Word has length 25 [2021-02-19 18:21:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:42,861 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 748 transitions. [2021-02-19 18:21:42,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 748 transitions. [2021-02-19 18:21:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:42,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:42,862 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:43,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:21:43,066 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:43,066 INFO L82 PathProgramCache]: Analyzing trace with hash 137388585, now seen corresponding path program 42 times [2021-02-19 18:21:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:43,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302400788] [2021-02-19 18:21:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:43,180 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 18:21:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302400788] [2021-02-19 18:21:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002221694] [2021-02-19 18:21:43,181 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 18:21:43,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:21:43,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:43,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:43,468 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 18:21:43,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:43,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 18:21:43,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604161341] [2021-02-19 18:21:43,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:43,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:43,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:43,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:43,469 INFO L87 Difference]: Start difference. First operand 322 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:44,180 INFO L93 Difference]: Finished difference Result 429 states and 928 transitions. [2021-02-19 18:21:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:21:44,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:44,181 INFO L225 Difference]: With dead ends: 429 [2021-02-19 18:21:44,181 INFO L226 Difference]: Without dead ends: 376 [2021-02-19 18:21:44,181 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:21:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-02-19 18:21:44,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-02-19 18:21:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.306709265175719) internal successors, (722), 313 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 722 transitions. [2021-02-19 18:21:44,185 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 722 transitions. Word has length 25 [2021-02-19 18:21:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:44,185 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 722 transitions. [2021-02-19 18:21:44,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 722 transitions. [2021-02-19 18:21:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 18:21:44,185 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:44,185 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:44,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:44,394 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:44,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1450082559, now seen corresponding path program 43 times [2021-02-19 18:21:44,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:44,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291375997] [2021-02-19 18:21:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:44,594 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 18:21:44,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291375997] [2021-02-19 18:21:44,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686732386] [2021-02-19 18:21:44,594 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 18:21:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:44,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-02-19 18:21:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:44,940 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 18:21:44,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:44,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 18:21:44,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922957960] [2021-02-19 18:21:44,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 18:21:44,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 18:21:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-02-19 18:21:44,942 INFO L87 Difference]: Start difference. First operand 314 states and 722 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:47,377 INFO L93 Difference]: Finished difference Result 480 states and 1038 transitions. [2021-02-19 18:21:47,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:21:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 18:21:47,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:47,387 INFO L225 Difference]: With dead ends: 480 [2021-02-19 18:21:47,387 INFO L226 Difference]: Without dead ends: 466 [2021-02-19 18:21:47,387 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:21:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-02-19 18:21:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 316. [2021-02-19 18:21:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.3079365079365077) internal successors, (727), 315 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 727 transitions. [2021-02-19 18:21:47,391 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 727 transitions. Word has length 25 [2021-02-19 18:21:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:47,391 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 727 transitions. [2021-02-19 18:21:47,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 727 transitions. [2021-02-19 18:21:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:47,391 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:47,392 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:47,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:21:47,606 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash 774240483, now seen corresponding path program 44 times [2021-02-19 18:21:47,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:47,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303429333] [2021-02-19 18:21:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:47,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303429333] [2021-02-19 18:21:47,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489359895] [2021-02-19 18:21:47,807 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 18:21:47,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:21:47,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:47,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:48,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:48,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:48,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036905363] [2021-02-19 18:21:48,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:48,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:48,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:48,111 INFO L87 Difference]: Start difference. First operand 316 states and 727 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:49,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:49,435 INFO L93 Difference]: Finished difference Result 578 states and 1234 transitions. [2021-02-19 18:21:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:21:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:21:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:49,437 INFO L225 Difference]: With dead ends: 578 [2021-02-19 18:21:49,437 INFO L226 Difference]: Without dead ends: 529 [2021-02-19 18:21:49,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=557, Invalid=3603, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:21:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-02-19 18:21:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 389. [2021-02-19 18:21:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.36340206185567) internal successors, (917), 388 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 917 transitions. [2021-02-19 18:21:49,442 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 917 transitions. Word has length 27 [2021-02-19 18:21:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:49,442 INFO L480 AbstractCegarLoop]: Abstraction has 389 states and 917 transitions. [2021-02-19 18:21:49,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 917 transitions. [2021-02-19 18:21:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:49,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:49,443 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:49,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:21:49,654 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1170693781, now seen corresponding path program 45 times [2021-02-19 18:21:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:49,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371116752] [2021-02-19 18:21:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:49,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371116752] [2021-02-19 18:21:49,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740665452] [2021-02-19 18:21:49,865 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 18:21:49,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:21:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:49,882 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:49,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:50,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:50,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:50,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143936408] [2021-02-19 18:21:50,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:50,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:50,158 INFO L87 Difference]: Start difference. First operand 389 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:51,644 INFO L93 Difference]: Finished difference Result 602 states and 1279 transitions. [2021-02-19 18:21:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:21:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:21:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:51,646 INFO L225 Difference]: With dead ends: 602 [2021-02-19 18:21:51,646 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 18:21:51,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=641, Invalid=4189, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:21:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 18:21:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 392. [2021-02-19 18:21:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.360613810741688) internal successors, (923), 391 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 923 transitions. [2021-02-19 18:21:51,652 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 923 transitions. Word has length 27 [2021-02-19 18:21:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:51,652 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 923 transitions. [2021-02-19 18:21:51,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 923 transitions. [2021-02-19 18:21:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:51,653 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:51,653 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:51,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:51,858 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -338269265, now seen corresponding path program 46 times [2021-02-19 18:21:51,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:51,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48948502] [2021-02-19 18:21:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:52,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48948502] [2021-02-19 18:21:52,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712330757] [2021-02-19 18:21:52,110 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 18:21:52,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:21:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:52,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:52,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:52,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:52,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331998467] [2021-02-19 18:21:52,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:52,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:52,435 INFO L87 Difference]: Start difference. First operand 392 states and 923 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:54,256 INFO L93 Difference]: Finished difference Result 695 states and 1437 transitions. [2021-02-19 18:21:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:21:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:21:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:54,258 INFO L225 Difference]: With dead ends: 695 [2021-02-19 18:21:54,258 INFO L226 Difference]: Without dead ends: 656 [2021-02-19 18:21:54,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=744, Invalid=4806, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:21:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-02-19 18:21:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 398. [2021-02-19 18:21:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.367758186397985) internal successors, (940), 397 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 940 transitions. [2021-02-19 18:21:54,265 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 940 transitions. Word has length 27 [2021-02-19 18:21:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:54,265 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 940 transitions. [2021-02-19 18:21:54,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 940 transitions. [2021-02-19 18:21:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:54,265 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:54,265 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:54,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 18:21:54,466 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:54,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1603197125, now seen corresponding path program 47 times [2021-02-19 18:21:54,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:54,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236026421] [2021-02-19 18:21:54,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:54,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236026421] [2021-02-19 18:21:54,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107755736] [2021-02-19 18:21:54,736 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 18:21:54,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:21:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:54,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:54,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:55,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:55,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:55,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470945786] [2021-02-19 18:21:55,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:55,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:55,064 INFO L87 Difference]: Start difference. First operand 398 states and 940 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:56,725 INFO L93 Difference]: Finished difference Result 650 states and 1350 transitions. [2021-02-19 18:21:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:21:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:21:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:56,727 INFO L225 Difference]: With dead ends: 650 [2021-02-19 18:21:56,727 INFO L226 Difference]: Without dead ends: 623 [2021-02-19 18:21:56,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=692, Invalid=4138, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 18:21:56,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-02-19 18:21:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 399. [2021-02-19 18:21:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.3668341708542715) internal successors, (942), 398 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 942 transitions. [2021-02-19 18:21:56,733 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 942 transitions. Word has length 27 [2021-02-19 18:21:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 942 transitions. [2021-02-19 18:21:56,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 942 transitions. [2021-02-19 18:21:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:56,733 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:56,733 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:56,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:56,942 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash -467011853, now seen corresponding path program 48 times [2021-02-19 18:21:56,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:56,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313176367] [2021-02-19 18:21:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313176367] [2021-02-19 18:21:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628783301] [2021-02-19 18:21:57,123 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 18:21:57,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:21:57,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:21:57,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:57,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:57,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:57,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:57,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881115165] [2021-02-19 18:21:57,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:57,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:57,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:57,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:57,436 INFO L87 Difference]: Start difference. First operand 399 states and 942 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:59,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:59,111 INFO L93 Difference]: Finished difference Result 671 states and 1386 transitions. [2021-02-19 18:21:59,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:21:59,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:21:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:59,113 INFO L225 Difference]: With dead ends: 671 [2021-02-19 18:21:59,113 INFO L226 Difference]: Without dead ends: 647 [2021-02-19 18:21:59,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:21:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-02-19 18:21:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 402. [2021-02-19 18:21:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.369077306733167) internal successors, (950), 401 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 950 transitions. [2021-02-19 18:21:59,119 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 950 transitions. Word has length 27 [2021-02-19 18:21:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:59,119 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 950 transitions. [2021-02-19 18:21:59,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:21:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 950 transitions. [2021-02-19 18:21:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:21:59,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:21:59,122 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:59,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:21:59,330 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:21:59,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:59,330 INFO L82 PathProgramCache]: Analyzing trace with hash 183057117, now seen corresponding path program 49 times [2021-02-19 18:21:59,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:59,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948938665] [2021-02-19 18:21:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:59,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948938665] [2021-02-19 18:21:59,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981346076] [2021-02-19 18:21:59,510 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 18:21:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:59,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:21:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:21:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:59,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:21:59,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:21:59,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698949068] [2021-02-19 18:21:59,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:21:59,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:59,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:21:59,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:21:59,799 INFO L87 Difference]: Start difference. First operand 402 states and 950 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:01,607 INFO L93 Difference]: Finished difference Result 699 states and 1488 transitions. [2021-02-19 18:22:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:22:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:01,609 INFO L225 Difference]: With dead ends: 699 [2021-02-19 18:22:01,609 INFO L226 Difference]: Without dead ends: 676 [2021-02-19 18:22:01,610 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=873, Invalid=4827, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:22:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-02-19 18:22:01,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 422. [2021-02-19 18:22:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.36104513064133) internal successors, (994), 421 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 994 transitions. [2021-02-19 18:22:01,615 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 994 transitions. Word has length 27 [2021-02-19 18:22:01,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:01,616 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 994 transitions. [2021-02-19 18:22:01,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 994 transitions. [2021-02-19 18:22:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:01,616 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:01,616 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:01,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:22:01,831 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 125654709, now seen corresponding path program 50 times [2021-02-19 18:22:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:01,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530625687] [2021-02-19 18:22:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:02,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530625687] [2021-02-19 18:22:02,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196706912] [2021-02-19 18:22:02,009 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 18:22:02,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:22:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:02,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:02,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:02,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:02,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:22:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29453902] [2021-02-19 18:22:02,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:02,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:02,343 INFO L87 Difference]: Start difference. First operand 422 states and 994 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:04,652 INFO L93 Difference]: Finished difference Result 792 states and 1672 transitions. [2021-02-19 18:22:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:22:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:04,655 INFO L225 Difference]: With dead ends: 792 [2021-02-19 18:22:04,655 INFO L226 Difference]: Without dead ends: 750 [2021-02-19 18:22:04,655 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=838, Invalid=5642, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 18:22:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-02-19 18:22:04,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 482. [2021-02-19 18:22:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.3866943866943866) internal successors, (1148), 481 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:04,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1148 transitions. [2021-02-19 18:22:04,661 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1148 transitions. Word has length 27 [2021-02-19 18:22:04,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:04,661 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1148 transitions. [2021-02-19 18:22:04,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:04,662 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1148 transitions. [2021-02-19 18:22:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:04,662 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:04,662 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:04,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:04,863 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1139273151, now seen corresponding path program 51 times [2021-02-19 18:22:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:04,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108571268] [2021-02-19 18:22:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:05,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108571268] [2021-02-19 18:22:05,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567980023] [2021-02-19 18:22:05,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:22:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:05,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 18:22:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:05,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:05,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:22:05,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213969246] [2021-02-19 18:22:05,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:05,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:05,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:05,376 INFO L87 Difference]: Start difference. First operand 482 states and 1148 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:07,442 INFO L93 Difference]: Finished difference Result 763 states and 1624 transitions. [2021-02-19 18:22:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-02-19 18:22:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:07,445 INFO L225 Difference]: With dead ends: 763 [2021-02-19 18:22:07,445 INFO L226 Difference]: Without dead ends: 736 [2021-02-19 18:22:07,445 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=794, Invalid=4906, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:22:07,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-02-19 18:22:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 480. [2021-02-19 18:22:07,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.363256784968685) internal successors, (1132), 479 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:07,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1132 transitions. [2021-02-19 18:22:07,451 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1132 transitions. Word has length 27 [2021-02-19 18:22:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:07,451 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1132 transitions. [2021-02-19 18:22:07,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1132 transitions. [2021-02-19 18:22:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:07,452 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:07,452 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:07,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 18:22:07,662 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1091003709, now seen corresponding path program 52 times [2021-02-19 18:22:07,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:07,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400865846] [2021-02-19 18:22:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400865846] [2021-02-19 18:22:07,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628770770] [2021-02-19 18:22:07,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:07,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:22:07,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:07,863 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:07,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:08,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:08,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:22:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158581690] [2021-02-19 18:22:08,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:08,153 INFO L87 Difference]: Start difference. First operand 480 states and 1132 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:09,977 INFO L93 Difference]: Finished difference Result 760 states and 1660 transitions. [2021-02-19 18:22:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:22:09,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:09,979 INFO L225 Difference]: With dead ends: 760 [2021-02-19 18:22:09,979 INFO L226 Difference]: Without dead ends: 736 [2021-02-19 18:22:09,980 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=730, Invalid=3826, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:22:09,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-02-19 18:22:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 506. [2021-02-19 18:22:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.37029702970297) internal successors, (1197), 505 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1197 transitions. [2021-02-19 18:22:09,986 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1197 transitions. Word has length 27 [2021-02-19 18:22:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:09,986 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1197 transitions. [2021-02-19 18:22:09,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1197 transitions. [2021-02-19 18:22:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:09,987 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:09,987 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:10,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 18:22:10,187 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash -135453089, now seen corresponding path program 53 times [2021-02-19 18:22:10,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:10,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795838790] [2021-02-19 18:22:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:10,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795838790] [2021-02-19 18:22:10,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600354202] [2021-02-19 18:22:10,335 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 18:22:10,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:22:10,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:10,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:10,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:10,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 18:22:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474975022] [2021-02-19 18:22:10,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:22:10,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:22:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:22:10,667 INFO L87 Difference]: Start difference. First operand 506 states and 1197 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:12,127 INFO L93 Difference]: Finished difference Result 717 states and 1578 transitions. [2021-02-19 18:22:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:22:12,127 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:12,128 INFO L225 Difference]: With dead ends: 717 [2021-02-19 18:22:12,129 INFO L226 Difference]: Without dead ends: 692 [2021-02-19 18:22:12,129 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:22:12,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-02-19 18:22:12,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 441. [2021-02-19 18:22:12,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.3136363636363635) internal successors, (1018), 440 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1018 transitions. [2021-02-19 18:22:12,134 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1018 transitions. Word has length 27 [2021-02-19 18:22:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:12,134 INFO L480 AbstractCegarLoop]: Abstraction has 441 states and 1018 transitions. [2021-02-19 18:22:12,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1018 transitions. [2021-02-19 18:22:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:12,135 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:12,135 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:12,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-02-19 18:22:12,335 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:12,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:12,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2098654405, now seen corresponding path program 54 times [2021-02-19 18:22:12,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:12,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825064349] [2021-02-19 18:22:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:12,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825064349] [2021-02-19 18:22:12,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959941526] [2021-02-19 18:22:12,466 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 18:22:12,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:22:12,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:12,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:12,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:12,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:12,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 18:22:12,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012218533] [2021-02-19 18:22:12,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:22:12,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:12,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:22:12,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:22:12,808 INFO L87 Difference]: Start difference. First operand 441 states and 1018 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:13,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:13,862 INFO L93 Difference]: Finished difference Result 652 states and 1423 transitions. [2021-02-19 18:22:13,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:22:13,863 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:13,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:13,864 INFO L225 Difference]: With dead ends: 652 [2021-02-19 18:22:13,864 INFO L226 Difference]: Without dead ends: 638 [2021-02-19 18:22:13,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:22:13,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-02-19 18:22:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 519. [2021-02-19 18:22:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.2915057915057915) internal successors, (1187), 518 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1187 transitions. [2021-02-19 18:22:13,870 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1187 transitions. Word has length 27 [2021-02-19 18:22:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:13,870 INFO L480 AbstractCegarLoop]: Abstraction has 519 states and 1187 transitions. [2021-02-19 18:22:13,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1187 transitions. [2021-02-19 18:22:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:13,871 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:13,871 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:14,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:14,071 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:14,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:14,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1085961873, now seen corresponding path program 55 times [2021-02-19 18:22:14,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:14,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575256603] [2021-02-19 18:22:14,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575256603] [2021-02-19 18:22:14,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481298126] [2021-02-19 18:22:14,207 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) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:14,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:14,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:14,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:14,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 18:22:14,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037821922] [2021-02-19 18:22:14,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:22:14,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:22:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:22:14,545 INFO L87 Difference]: Start difference. First operand 519 states and 1187 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:15,718 INFO L93 Difference]: Finished difference Result 692 states and 1496 transitions. [2021-02-19 18:22:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:22:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:15,720 INFO L225 Difference]: With dead ends: 692 [2021-02-19 18:22:15,720 INFO L226 Difference]: Without dead ends: 653 [2021-02-19 18:22:15,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:22:15,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-02-19 18:22:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 445. [2021-02-19 18:22:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.2995495495495497) internal successors, (1021), 444 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1021 transitions. [2021-02-19 18:22:15,725 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1021 transitions. Word has length 27 [2021-02-19 18:22:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:15,726 INFO L480 AbstractCegarLoop]: Abstraction has 445 states and 1021 transitions. [2021-02-19 18:22:15,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1021 transitions. [2021-02-19 18:22:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:15,726 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:15,726 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:15,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:15,934 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:15,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:15,934 INFO L82 PathProgramCache]: Analyzing trace with hash 550732071, now seen corresponding path program 56 times [2021-02-19 18:22:15,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:15,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712588819] [2021-02-19 18:22:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:16,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712588819] [2021-02-19 18:22:16,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282717] [2021-02-19 18:22:16,068 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) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:22:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:16,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:16,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:16,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-02-19 18:22:16,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313020412] [2021-02-19 18:22:16,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 18:22:16,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:16,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 18:22:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 18:22:16,386 INFO L87 Difference]: Start difference. First operand 445 states and 1021 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:17,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:17,144 INFO L93 Difference]: Finished difference Result 571 states and 1246 transitions. [2021-02-19 18:22:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 18:22:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:17,146 INFO L225 Difference]: With dead ends: 571 [2021-02-19 18:22:17,146 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 18:22:17,146 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:22:17,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 18:22:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 415. [2021-02-19 18:22:17,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.1449275362318843) internal successors, (888), 414 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:17,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 888 transitions. [2021-02-19 18:22:17,151 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 888 transitions. Word has length 27 [2021-02-19 18:22:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:17,151 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 888 transitions. [2021-02-19 18:22:17,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 888 transitions. [2021-02-19 18:22:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:17,152 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:17,152 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:17,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:17,352 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:17,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:17,352 INFO L82 PathProgramCache]: Analyzing trace with hash 94141561, now seen corresponding path program 57 times [2021-02-19 18:22:17,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:17,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815563209] [2021-02-19 18:22:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:17,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:17,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815563209] [2021-02-19 18:22:17,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398290817] [2021-02-19 18:22:17,537 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 18:22:17,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:22:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:17,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 18:22:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:17,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:17,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-02-19 18:22:17,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570613003] [2021-02-19 18:22:17,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:17,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:17,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:17,837 INFO L87 Difference]: Start difference. First operand 415 states and 888 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:19,766 INFO L93 Difference]: Finished difference Result 582 states and 1181 transitions. [2021-02-19 18:22:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:22:19,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:19,767 INFO L225 Difference]: With dead ends: 582 [2021-02-19 18:22:19,767 INFO L226 Difference]: Without dead ends: 565 [2021-02-19 18:22:19,768 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:22:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-02-19 18:22:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 328. [2021-02-19 18:22:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.1376146788990824) internal successors, (699), 327 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 699 transitions. [2021-02-19 18:22:19,772 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 699 transitions. Word has length 27 [2021-02-19 18:22:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:19,772 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 699 transitions. [2021-02-19 18:22:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 699 transitions. [2021-02-19 18:22:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 18:22:19,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:19,773 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:19,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:19,983 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:19,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:19,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1764176895, now seen corresponding path program 58 times [2021-02-19 18:22:19,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:19,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757345080] [2021-02-19 18:22:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:22:20,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757345080] [2021-02-19 18:22:20,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165477971] [2021-02-19 18:22:20,026 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) [2021-02-19 18:22:20,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:22:20,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 18:22:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:22:20,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:20,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-02-19 18:22:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058943342] [2021-02-19 18:22:20,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:22:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:22:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:22:20,105 INFO L87 Difference]: Start difference. First operand 328 states and 699 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:20,177 INFO L93 Difference]: Finished difference Result 486 states and 1004 transitions. [2021-02-19 18:22:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 18:22:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 18:22:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:20,178 INFO L225 Difference]: With dead ends: 486 [2021-02-19 18:22:20,178 INFO L226 Difference]: Without dead ends: 453 [2021-02-19 18:22:20,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:22:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-19 18:22:20,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 301. [2021-02-19 18:22:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1333333333333333) internal successors, (640), 300 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 640 transitions. [2021-02-19 18:22:20,182 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 640 transitions. Word has length 27 [2021-02-19 18:22:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:20,182 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 640 transitions. [2021-02-19 18:22:20,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 640 transitions. [2021-02-19 18:22:20,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:20,182 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:20,182 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:20,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 18:22:20,390 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1498988557, now seen corresponding path program 59 times [2021-02-19 18:22:20,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:20,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054863616] [2021-02-19 18:22:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:20,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054863616] [2021-02-19 18:22:20,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793200568] [2021-02-19 18:22:20,575 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 18:22:20,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:22:20,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:20,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:20,961 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 18:22:20,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:20,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-02-19 18:22:20,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377912283] [2021-02-19 18:22:20,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:22:20,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:22:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:22:20,962 INFO L87 Difference]: Start difference. First operand 301 states and 640 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:22,335 INFO L93 Difference]: Finished difference Result 603 states and 1209 transitions. [2021-02-19 18:22:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:22:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:22,337 INFO L225 Difference]: With dead ends: 603 [2021-02-19 18:22:22,337 INFO L226 Difference]: Without dead ends: 575 [2021-02-19 18:22:22,337 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 18:22:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-02-19 18:22:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 320. [2021-02-19 18:22:22,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.1316614420062696) internal successors, (680), 319 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 680 transitions. [2021-02-19 18:22:22,341 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 680 transitions. Word has length 29 [2021-02-19 18:22:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:22,341 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 680 transitions. [2021-02-19 18:22:22,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 680 transitions. [2021-02-19 18:22:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:22,342 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:22,342 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:22,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:22,554 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1560408425, now seen corresponding path program 60 times [2021-02-19 18:22:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:22,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487049902] [2021-02-19 18:22:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:22,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487049902] [2021-02-19 18:22:22,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79348770] [2021-02-19 18:22:22,708 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) [2021-02-19 18:22:22,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:22:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:22,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:23,087 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 18:22:23,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:23,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 18:22:23,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847405121] [2021-02-19 18:22:23,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:23,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:23,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:23,088 INFO L87 Difference]: Start difference. First operand 320 states and 680 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:25,243 INFO L93 Difference]: Finished difference Result 793 states and 1575 transitions. [2021-02-19 18:22:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:22:25,244 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:25,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:25,245 INFO L225 Difference]: With dead ends: 793 [2021-02-19 18:22:25,245 INFO L226 Difference]: Without dead ends: 745 [2021-02-19 18:22:25,245 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:22:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-02-19 18:22:25,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 424. [2021-02-19 18:22:25,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.1465721040189125) internal successors, (908), 423 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:25,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 908 transitions. [2021-02-19 18:22:25,251 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 908 transitions. Word has length 29 [2021-02-19 18:22:25,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:25,251 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 908 transitions. [2021-02-19 18:22:25,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 908 transitions. [2021-02-19 18:22:25,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:25,251 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:25,252 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:25,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 18:22:25,453 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 547715893, now seen corresponding path program 61 times [2021-02-19 18:22:25,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:25,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698830102] [2021-02-19 18:22:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:25,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698830102] [2021-02-19 18:22:25,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267253309] [2021-02-19 18:22:25,599 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 18:22:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:25,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:25,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:25,940 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 18:22:25,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:25,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 18:22:25,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509952655] [2021-02-19 18:22:25,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:25,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:25,941 INFO L87 Difference]: Start difference. First operand 424 states and 908 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:28,521 INFO L93 Difference]: Finished difference Result 978 states and 1947 transitions. [2021-02-19 18:22:28,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 18:22:28,522 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:28,523 INFO L225 Difference]: With dead ends: 978 [2021-02-19 18:22:28,523 INFO L226 Difference]: Without dead ends: 927 [2021-02-19 18:22:28,524 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 18:22:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-02-19 18:22:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 410. [2021-02-19 18:22:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1491442542787285) internal successors, (879), 409 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 879 transitions. [2021-02-19 18:22:28,529 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 879 transitions. Word has length 29 [2021-02-19 18:22:28,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:28,530 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 879 transitions. [2021-02-19 18:22:28,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 879 transitions. [2021-02-19 18:22:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:28,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:28,530 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:28,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:28,731 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash -130222797, now seen corresponding path program 62 times [2021-02-19 18:22:28,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:28,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591945907] [2021-02-19 18:22:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:28,876 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 18:22:28,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591945907] [2021-02-19 18:22:28,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858480567] [2021-02-19 18:22:28,877 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 18:22:28,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:22:28,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:28,894 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:29,224 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 18:22:29,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:29,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-02-19 18:22:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134023187] [2021-02-19 18:22:29,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:22:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:22:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:22:29,225 INFO L87 Difference]: Start difference. First operand 410 states and 879 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:30,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:30,918 INFO L93 Difference]: Finished difference Result 668 states and 1344 transitions. [2021-02-19 18:22:30,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:22:30,919 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:30,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:30,920 INFO L225 Difference]: With dead ends: 668 [2021-02-19 18:22:30,920 INFO L226 Difference]: Without dead ends: 621 [2021-02-19 18:22:30,920 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=467, Invalid=3955, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:22:30,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-02-19 18:22:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 425. [2021-02-19 18:22:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.1485849056603774) internal successors, (911), 424 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 911 transitions. [2021-02-19 18:22:30,925 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 911 transitions. Word has length 29 [2021-02-19 18:22:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:30,925 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 911 transitions. [2021-02-19 18:22:30,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 911 transitions. [2021-02-19 18:22:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:30,926 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:30,926 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:31,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:22:31,142 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:31,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:31,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1142915329, now seen corresponding path program 63 times [2021-02-19 18:22:31,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:31,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953142771] [2021-02-19 18:22:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:31,344 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 18:22:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953142771] [2021-02-19 18:22:31,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777537693] [2021-02-19 18:22:31,345 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) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:31,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:22:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:31,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:22:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:31,780 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 18:22:31,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:31,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 18:22:31,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170658213] [2021-02-19 18:22:31,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:22:31,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:22:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:22:31,782 INFO L87 Difference]: Start difference. First operand 425 states and 911 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:33,835 INFO L93 Difference]: Finished difference Result 699 states and 1402 transitions. [2021-02-19 18:22:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:22:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:33,837 INFO L225 Difference]: With dead ends: 699 [2021-02-19 18:22:33,837 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 18:22:33,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=702, Invalid=4410, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:22:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 18:22:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 410. [2021-02-19 18:22:33,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.1589242053789732) internal successors, (883), 409 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 883 transitions. [2021-02-19 18:22:33,842 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 883 transitions. Word has length 29 [2021-02-19 18:22:33,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:33,842 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 883 transitions. [2021-02-19 18:22:33,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 883 transitions. [2021-02-19 18:22:33,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:33,843 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:33,843 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:34,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:34,043 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash 44935741, now seen corresponding path program 64 times [2021-02-19 18:22:34,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:34,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029835441] [2021-02-19 18:22:34,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:34,312 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 18:22:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029835441] [2021-02-19 18:22:34,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084544348] [2021-02-19 18:22:34,312 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 18:22:34,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:22:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:34,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:34,757 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 18:22:34,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:34,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-02-19 18:22:34,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635945774] [2021-02-19 18:22:34,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:22:34,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:34,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:22:34,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:22:34,759 INFO L87 Difference]: Start difference. First operand 410 states and 883 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 18:22:37,652 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 18:22:38,076 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 18:22:38,246 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-02-19 18:22:38,524 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 18:22:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:39,508 INFO L93 Difference]: Finished difference Result 911 states and 1858 transitions. [2021-02-19 18:22:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-02-19 18:22:39,508 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:39,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:39,510 INFO L225 Difference]: With dead ends: 911 [2021-02-19 18:22:39,510 INFO L226 Difference]: Without dead ends: 862 [2021-02-19 18:22:39,510 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1216, Invalid=6974, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 18:22:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-02-19 18:22:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 479. [2021-02-19 18:22:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1527196652719667) internal successors, (1029), 478 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1029 transitions. [2021-02-19 18:22:39,516 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1029 transitions. Word has length 29 [2021-02-19 18:22:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:39,516 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1029 transitions. [2021-02-19 18:22:39,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 18:22:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1029 transitions. [2021-02-19 18:22:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:39,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:39,517 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:39,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:39,717 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1181121013, now seen corresponding path program 65 times [2021-02-19 18:22:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:39,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726748456] [2021-02-19 18:22:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:39,980 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 18:22:39,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726748456] [2021-02-19 18:22:39,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528919190] [2021-02-19 18:22:39,980 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 18:22:40,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 18:22:40,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:40,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:40,428 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 18:22:40,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:40,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-02-19 18:22:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818654388] [2021-02-19 18:22:40,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:22:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:40,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:22:40,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:22:40,429 INFO L87 Difference]: Start difference. First operand 479 states and 1029 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 18:22:43,551 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-02-19 18:22:43,690 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 18:22:44,004 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-02-19 18:22:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:45,435 INFO L93 Difference]: Finished difference Result 910 states and 1863 transitions. [2021-02-19 18:22:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-02-19 18:22:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:45,437 INFO L225 Difference]: With dead ends: 910 [2021-02-19 18:22:45,437 INFO L226 Difference]: Without dead ends: 863 [2021-02-19 18:22:45,437 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 18:22:45,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-02-19 18:22:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 457. [2021-02-19 18:22:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 2.1578947368421053) internal successors, (984), 456 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 984 transitions. [2021-02-19 18:22:45,443 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 984 transitions. Word has length 29 [2021-02-19 18:22:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:45,443 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 984 transitions. [2021-02-19 18:22:45,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 18:22:45,443 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 984 transitions. [2021-02-19 18:22:45,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:45,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:45,443 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:45,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-02-19 18:22:45,658 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:45,658 INFO L82 PathProgramCache]: Analyzing trace with hash 2134232045, now seen corresponding path program 66 times [2021-02-19 18:22:45,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:45,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386226836] [2021-02-19 18:22:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:45,942 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 18:22:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386226836] [2021-02-19 18:22:45,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005469483] [2021-02-19 18:22:45,943 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 18:22:45,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:22:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:45,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:22:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:46,331 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 18:22:46,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:46,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-02-19 18:22:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709436496] [2021-02-19 18:22:46,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:22:46,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:22:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:22:46,333 INFO L87 Difference]: Start difference. First operand 457 states and 984 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:48,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:48,593 INFO L93 Difference]: Finished difference Result 633 states and 1292 transitions. [2021-02-19 18:22:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:22:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:48,594 INFO L225 Difference]: With dead ends: 633 [2021-02-19 18:22:48,594 INFO L226 Difference]: Without dead ends: 598 [2021-02-19 18:22:48,595 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=4183, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:22:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-02-19 18:22:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 429. [2021-02-19 18:22:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.135514018691589) internal successors, (914), 428 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 914 transitions. [2021-02-19 18:22:48,599 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 914 transitions. Word has length 29 [2021-02-19 18:22:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:48,599 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 914 transitions. [2021-02-19 18:22:48,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 914 transitions. [2021-02-19 18:22:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:48,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:48,600 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:48,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 18:22:48,800 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1195386251, now seen corresponding path program 67 times [2021-02-19 18:22:48,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696263833] [2021-02-19 18:22:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:49,086 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 18:22:49,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696263833] [2021-02-19 18:22:49,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682149451] [2021-02-19 18:22:49,087 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 18:22:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:49,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:22:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:49,526 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 18:22:49,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:49,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-02-19 18:22:49,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582959940] [2021-02-19 18:22:49,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:22:49,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:22:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:22:49,527 INFO L87 Difference]: Start difference. First operand 429 states and 914 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:50,996 INFO L93 Difference]: Finished difference Result 592 states and 1203 transitions. [2021-02-19 18:22:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:22:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:50,998 INFO L225 Difference]: With dead ends: 592 [2021-02-19 18:22:50,998 INFO L226 Difference]: Without dead ends: 572 [2021-02-19 18:22:50,998 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=478, Invalid=3304, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:22:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-02-19 18:22:51,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 360. [2021-02-19 18:22:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1559888579387185) internal successors, (774), 359 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 774 transitions. [2021-02-19 18:22:51,002 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 774 transitions. Word has length 29 [2021-02-19 18:22:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:51,002 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 774 transitions. [2021-02-19 18:22:51,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:51,002 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 774 transitions. [2021-02-19 18:22:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:22:51,003 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:51,003 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:51,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:51,203 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1300576755, now seen corresponding path program 68 times [2021-02-19 18:22:51,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:51,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16071963] [2021-02-19 18:22:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:51,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16071963] [2021-02-19 18:22:51,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255938503] [2021-02-19 18:22:51,369 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 18:22:51,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:22:51,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:51,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 18:22:51,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:51,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:51,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 18:22:51,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709560676] [2021-02-19 18:22:51,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:22:51,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:51,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:22:51,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:22:51,734 INFO L87 Difference]: Start difference. First operand 360 states and 774 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:53,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:53,413 INFO L93 Difference]: Finished difference Result 586 states and 1199 transitions. [2021-02-19 18:22:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:22:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 18:22:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:53,415 INFO L225 Difference]: With dead ends: 586 [2021-02-19 18:22:53,415 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 18:22:53,416 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:22:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 18:22:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 240. [2021-02-19 18:22:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.062761506276151) internal successors, (493), 239 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 493 transitions. [2021-02-19 18:22:53,419 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 493 transitions. Word has length 29 [2021-02-19 18:22:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:53,419 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 493 transitions. [2021-02-19 18:22:53,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 493 transitions. [2021-02-19 18:22:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:22:53,419 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:53,420 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:53,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:53,620 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1217597153, now seen corresponding path program 69 times [2021-02-19 18:22:53,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:53,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580923960] [2021-02-19 18:22:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:53,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580923960] [2021-02-19 18:22:53,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928735549] [2021-02-19 18:22:53,884 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 18:22:53,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:22:53,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:53,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:22:53,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:54,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:54,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:22:54,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184827072] [2021-02-19 18:22:54,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:22:54,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:54,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:22:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:22:54,276 INFO L87 Difference]: Start difference. First operand 240 states and 493 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:56,066 INFO L93 Difference]: Finished difference Result 513 states and 999 transitions. [2021-02-19 18:22:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:22:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:22:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:56,067 INFO L225 Difference]: With dead ends: 513 [2021-02-19 18:22:56,067 INFO L226 Difference]: Without dead ends: 458 [2021-02-19 18:22:56,068 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=722, Invalid=4828, Unknown=0, NotChecked=0, Total=5550 [2021-02-19 18:22:56,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-02-19 18:22:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 297. [2021-02-19 18:22:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.125) internal successors, (629), 296 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 629 transitions. [2021-02-19 18:22:56,071 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 629 transitions. Word has length 31 [2021-02-19 18:22:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:56,071 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 629 transitions. [2021-02-19 18:22:56,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 629 transitions. [2021-02-19 18:22:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:22:56,071 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:56,072 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:56,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:56,287 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1988651097, now seen corresponding path program 70 times [2021-02-19 18:22:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:56,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753359713] [2021-02-19 18:22:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:56,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753359713] [2021-02-19 18:22:56,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208607335] [2021-02-19 18:22:56,577 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 18:22:56,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:22:56,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:56,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:22:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:57,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:57,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:22:57,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431508885] [2021-02-19 18:22:57,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:22:57,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:22:57,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:22:57,020 INFO L87 Difference]: Start difference. First operand 297 states and 629 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:59,073 INFO L93 Difference]: Finished difference Result 533 states and 1032 transitions. [2021-02-19 18:22:59,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 18:22:59,074 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:22:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:59,074 INFO L225 Difference]: With dead ends: 533 [2021-02-19 18:22:59,074 INFO L226 Difference]: Without dead ends: 489 [2021-02-19 18:22:59,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:22:59,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-02-19 18:22:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 299. [2021-02-19 18:22:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.1241610738255035) internal successors, (633), 298 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 633 transitions. [2021-02-19 18:22:59,078 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 633 transitions. Word has length 31 [2021-02-19 18:22:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:59,079 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 633 transitions. [2021-02-19 18:22:59,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:22:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 633 transitions. [2021-02-19 18:22:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:22:59,079 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:22:59,079 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:59,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-02-19 18:22:59,279 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:22:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash -892608277, now seen corresponding path program 71 times [2021-02-19 18:22:59,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:59,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683348230] [2021-02-19 18:22:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:59,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683348230] [2021-02-19 18:22:59,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433373659] [2021-02-19 18:22:59,549 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) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:22:59,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:22:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:22:59,568 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:22:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:22:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:59,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:22:59,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:22:59,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125397667] [2021-02-19 18:22:59,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:22:59,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:22:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:22:59,950 INFO L87 Difference]: Start difference. First operand 299 states and 633 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:02,180 INFO L93 Difference]: Finished difference Result 531 states and 1030 transitions. [2021-02-19 18:23:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-02-19 18:23:02,181 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:02,182 INFO L225 Difference]: With dead ends: 531 [2021-02-19 18:23:02,182 INFO L226 Difference]: Without dead ends: 493 [2021-02-19 18:23:02,183 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:23:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-02-19 18:23:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 301. [2021-02-19 18:23:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.1233333333333335) internal successors, (637), 300 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 637 transitions. [2021-02-19 18:23:02,187 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 637 transitions. Word has length 31 [2021-02-19 18:23:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:02,187 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 637 transitions. [2021-02-19 18:23:02,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 637 transitions. [2021-02-19 18:23:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:02,187 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:02,187 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:02,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:02,403 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash -60183761, now seen corresponding path program 72 times [2021-02-19 18:23:02,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:02,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994043421] [2021-02-19 18:23:02,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:02,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994043421] [2021-02-19 18:23:02,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189199406] [2021-02-19 18:23:02,711 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) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:02,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:23:02,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:02,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:02,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:03,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:03,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:03,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292795779] [2021-02-19 18:23:03,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:03,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:03,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:03,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:03,116 INFO L87 Difference]: Start difference. First operand 301 states and 637 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:05,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:05,649 INFO L93 Difference]: Finished difference Result 576 states and 1113 transitions. [2021-02-19 18:23:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:23:05,650 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:05,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:05,651 INFO L225 Difference]: With dead ends: 576 [2021-02-19 18:23:05,651 INFO L226 Difference]: Without dead ends: 531 [2021-02-19 18:23:05,652 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 18:23:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-02-19 18:23:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 304. [2021-02-19 18:23:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-02-19 18:23:05,655 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-02-19 18:23:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:05,655 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-02-19 18:23:05,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-02-19 18:23:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:05,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:05,656 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:05,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:05,870 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1325111621, now seen corresponding path program 73 times [2021-02-19 18:23:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:05,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401054280] [2021-02-19 18:23:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:06,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401054280] [2021-02-19 18:23:06,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888154143] [2021-02-19 18:23:06,221 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 18:23:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:06,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:06,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:06,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:06,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49474171] [2021-02-19 18:23:06,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:06,645 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:08,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:08,911 INFO L93 Difference]: Finished difference Result 506 states and 985 transitions. [2021-02-19 18:23:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:23:08,912 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:08,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:08,912 INFO L225 Difference]: With dead ends: 506 [2021-02-19 18:23:08,912 INFO L226 Difference]: Without dead ends: 479 [2021-02-19 18:23:08,913 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:23:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-02-19 18:23:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 304. [2021-02-19 18:23:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.128712871287129) internal successors, (645), 303 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 645 transitions. [2021-02-19 18:23:08,916 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 645 transitions. Word has length 31 [2021-02-19 18:23:08,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:08,916 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 645 transitions. [2021-02-19 18:23:08,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 645 transitions. [2021-02-19 18:23:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:08,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:08,917 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:09,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:09,118 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:09,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:09,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1738268047, now seen corresponding path program 74 times [2021-02-19 18:23:09,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:09,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420803344] [2021-02-19 18:23:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:09,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420803344] [2021-02-19 18:23:09,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211039192] [2021-02-19 18:23:09,381 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 18:23:09,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:23:09,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:09,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:09,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:09,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:09,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126025165] [2021-02-19 18:23:09,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:09,787 INFO L87 Difference]: Start difference. First operand 304 states and 645 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:11,834 INFO L93 Difference]: Finished difference Result 503 states and 981 transitions. [2021-02-19 18:23:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 18:23:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:11,835 INFO L225 Difference]: With dead ends: 503 [2021-02-19 18:23:11,835 INFO L226 Difference]: Without dead ends: 465 [2021-02-19 18:23:11,836 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:23:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-02-19 18:23:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 314. [2021-02-19 18:23:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1246006389776357) internal successors, (665), 313 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:11,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 665 transitions. [2021-02-19 18:23:11,840 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 665 transitions. Word has length 31 [2021-02-19 18:23:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:11,840 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 665 transitions. [2021-02-19 18:23:11,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 665 transitions. [2021-02-19 18:23:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:11,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:11,840 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:12,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 18:23:12,041 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:12,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:12,041 INFO L82 PathProgramCache]: Analyzing trace with hash -905843531, now seen corresponding path program 75 times [2021-02-19 18:23:12,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:12,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423803659] [2021-02-19 18:23:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:12,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423803659] [2021-02-19 18:23:12,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81398322] [2021-02-19 18:23:12,380 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 18:23:12,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:23:12,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:12,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:12,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:12,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:12,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:12,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624537674] [2021-02-19 18:23:12,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:12,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:12,822 INFO L87 Difference]: Start difference. First operand 314 states and 665 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:15,229 INFO L93 Difference]: Finished difference Result 558 states and 1083 transitions. [2021-02-19 18:23:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:23:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:15,231 INFO L225 Difference]: With dead ends: 558 [2021-02-19 18:23:15,231 INFO L226 Difference]: Without dead ends: 513 [2021-02-19 18:23:15,231 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:23:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-02-19 18:23:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 316. [2021-02-19 18:23:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.126984126984127) internal successors, (670), 315 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 670 transitions. [2021-02-19 18:23:15,235 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 670 transitions. Word has length 31 [2021-02-19 18:23:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:15,235 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 670 transitions. [2021-02-19 18:23:15,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 670 transitions. [2021-02-19 18:23:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:15,236 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:15,236 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:15,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:15,440 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2124195905, now seen corresponding path program 76 times [2021-02-19 18:23:15,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:15,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002795094] [2021-02-19 18:23:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002795094] [2021-02-19 18:23:15,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817932469] [2021-02-19 18:23:15,773 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 18:23:15,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:23:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:15,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:16,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:16,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:16,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956932337] [2021-02-19 18:23:16,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:16,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:16,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:16,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:16,195 INFO L87 Difference]: Start difference. First operand 316 states and 670 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:18,297 INFO L93 Difference]: Finished difference Result 488 states and 962 transitions. [2021-02-19 18:23:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 18:23:18,298 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:18,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:18,299 INFO L225 Difference]: With dead ends: 488 [2021-02-19 18:23:18,299 INFO L226 Difference]: Without dead ends: 468 [2021-02-19 18:23:18,299 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 18:23:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-02-19 18:23:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 312. [2021-02-19 18:23:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.112540192926045) internal successors, (657), 311 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 657 transitions. [2021-02-19 18:23:18,303 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 657 transitions. Word has length 31 [2021-02-19 18:23:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:18,303 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 657 transitions. [2021-02-19 18:23:18,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 657 transitions. [2021-02-19 18:23:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:18,303 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:18,303 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:18,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:18,504 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:18,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1658354033, now seen corresponding path program 77 times [2021-02-19 18:23:18,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:18,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670582257] [2021-02-19 18:23:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:18,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670582257] [2021-02-19 18:23:18,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477484745] [2021-02-19 18:23:18,746 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 18:23:18,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 18:23:18,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:18,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:19,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:19,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:19,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717689375] [2021-02-19 18:23:19,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:19,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:19,174 INFO L87 Difference]: Start difference. First operand 312 states and 657 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:21,951 INFO L93 Difference]: Finished difference Result 577 states and 1140 transitions. [2021-02-19 18:23:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-02-19 18:23:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:21,953 INFO L225 Difference]: With dead ends: 577 [2021-02-19 18:23:21,953 INFO L226 Difference]: Without dead ends: 529 [2021-02-19 18:23:21,954 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:23:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-02-19 18:23:21,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 325. [2021-02-19 18:23:21,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.1203703703703702) internal successors, (687), 324 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:21,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 687 transitions. [2021-02-19 18:23:21,958 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 687 transitions. Word has length 31 [2021-02-19 18:23:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:21,958 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 687 transitions. [2021-02-19 18:23:21,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 687 transitions. [2021-02-19 18:23:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:21,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:21,959 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:22,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:22,174 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:22,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:22,174 INFO L82 PathProgramCache]: Analyzing trace with hash 393426173, now seen corresponding path program 78 times [2021-02-19 18:23:22,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:22,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314306049] [2021-02-19 18:23:22,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314306049] [2021-02-19 18:23:22,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848437648] [2021-02-19 18:23:22,414 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) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:22,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:23:22,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:22,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:23:22,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:22,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:22,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 18:23:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200001543] [2021-02-19 18:23:22,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:22,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:22,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:22,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:22,863 INFO L87 Difference]: Start difference. First operand 325 states and 687 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:25,436 INFO L93 Difference]: Finished difference Result 560 states and 1106 transitions. [2021-02-19 18:23:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:23:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:25,438 INFO L225 Difference]: With dead ends: 560 [2021-02-19 18:23:25,438 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 18:23:25,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:23:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 18:23:25,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 296. [2021-02-19 18:23:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.08135593220339) internal successors, (614), 295 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 614 transitions. [2021-02-19 18:23:25,442 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 614 transitions. Word has length 31 [2021-02-19 18:23:25,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:25,442 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 614 transitions. [2021-02-19 18:23:25,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 614 transitions. [2021-02-19 18:23:25,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:25,443 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:25,443 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:25,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:25,643 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:25,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1501291141, now seen corresponding path program 79 times [2021-02-19 18:23:25,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:25,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221142642] [2021-02-19 18:23:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221142642] [2021-02-19 18:23:25,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918811334] [2021-02-19 18:23:25,965 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 18:23:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:25,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:26,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:26,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-02-19 18:23:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504866096] [2021-02-19 18:23:26,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:23:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:23:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:23:26,545 INFO L87 Difference]: Start difference. First operand 296 states and 614 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:31,919 INFO L93 Difference]: Finished difference Result 797 states and 1604 transitions. [2021-02-19 18:23:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 18:23:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:31,921 INFO L225 Difference]: With dead ends: 797 [2021-02-19 18:23:31,921 INFO L226 Difference]: Without dead ends: 783 [2021-02-19 18:23:31,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1062, Invalid=8058, Unknown=0, NotChecked=0, Total=9120 [2021-02-19 18:23:31,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-02-19 18:23:31,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 340. [2021-02-19 18:23:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.0855457227138645) internal successors, (707), 339 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:31,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 707 transitions. [2021-02-19 18:23:31,926 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 707 transitions. Word has length 31 [2021-02-19 18:23:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:31,926 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 707 transitions. [2021-02-19 18:23:31,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 707 transitions. [2021-02-19 18:23:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:31,926 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:31,926 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:32,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:32,127 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1694555387, now seen corresponding path program 80 times [2021-02-19 18:23:32,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:32,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664582749] [2021-02-19 18:23:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:32,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664582749] [2021-02-19 18:23:32,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014866417] [2021-02-19 18:23:32,456 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 18:23:32,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:23:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:32,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:33,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:33,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 27 [2021-02-19 18:23:33,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791639078] [2021-02-19 18:23:33,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 18:23:33,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 18:23:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-02-19 18:23:33,103 INFO L87 Difference]: Start difference. First operand 340 states and 707 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:36,740 INFO L93 Difference]: Finished difference Result 552 states and 1113 transitions. [2021-02-19 18:23:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 18:23:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:36,742 INFO L225 Difference]: With dead ends: 552 [2021-02-19 18:23:36,742 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 18:23:36,742 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=629, Invalid=4627, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:23:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 18:23:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 354. [2021-02-19 18:23:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-02-19 18:23:36,746 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 31 [2021-02-19 18:23:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:36,746 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-02-19 18:23:36,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-02-19 18:23:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 18:23:36,746 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:36,746 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:36,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:36,946 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2071474683, now seen corresponding path program 81 times [2021-02-19 18:23:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:36,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841830942] [2021-02-19 18:23:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:23:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841830942] [2021-02-19 18:23:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672907324] [2021-02-19 18:23:37,227 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 18:23:37,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:23:37,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:37,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 18:23:37,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:37,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-02-19 18:23:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774830523] [2021-02-19 18:23:37,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:23:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:23:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:23:37,705 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:39,002 INFO L93 Difference]: Finished difference Result 580 states and 1168 transitions. [2021-02-19 18:23:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:23:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 18:23:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:39,004 INFO L225 Difference]: With dead ends: 580 [2021-02-19 18:23:39,004 INFO L226 Difference]: Without dead ends: 566 [2021-02-19 18:23:39,004 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=438, Invalid=2112, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:23:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-02-19 18:23:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 321. [2021-02-19 18:23:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.065625) internal successors, (661), 320 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 661 transitions. [2021-02-19 18:23:39,007 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 661 transitions. Word has length 31 [2021-02-19 18:23:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:39,007 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 661 transitions. [2021-02-19 18:23:39,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 661 transitions. [2021-02-19 18:23:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:23:39,008 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:39,008 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:39,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:39,222 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1636442769, now seen corresponding path program 82 times [2021-02-19 18:23:39,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:39,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259348627] [2021-02-19 18:23:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:23:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259348627] [2021-02-19 18:23:39,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356725185] [2021-02-19 18:23:39,286 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 18:23:39,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:23:39,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:39,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:23:39,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:23:39,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:39,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-02-19 18:23:39,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838778402] [2021-02-19 18:23:39,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 18:23:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 18:23:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:23:39,387 INFO L87 Difference]: Start difference. First operand 321 states and 661 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:39,506 INFO L93 Difference]: Finished difference Result 494 states and 989 transitions. [2021-02-19 18:23:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:23:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:23:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:39,507 INFO L225 Difference]: With dead ends: 494 [2021-02-19 18:23:39,507 INFO L226 Difference]: Without dead ends: 455 [2021-02-19 18:23:39,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-02-19 18:23:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-02-19 18:23:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 320. [2021-02-19 18:23:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0658307210031346) internal successors, (659), 319 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 659 transitions. [2021-02-19 18:23:39,510 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 659 transitions. Word has length 33 [2021-02-19 18:23:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:39,511 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 659 transitions. [2021-02-19 18:23:39,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 659 transitions. [2021-02-19 18:23:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:23:39,511 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:39,511 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:39,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 18:23:39,712 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1520215929, now seen corresponding path program 83 times [2021-02-19 18:23:39,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:39,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023345635] [2021-02-19 18:23:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023345635] [2021-02-19 18:23:40,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253592631] [2021-02-19 18:23:40,134 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:23:40,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 18:23:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:40,157 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 18:23:40,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:40,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:40,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-02-19 18:23:40,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477144894] [2021-02-19 18:23:40,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:23:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:40,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:23:40,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:23:40,740 INFO L87 Difference]: Start difference. First operand 320 states and 659 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:43,146 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 18:23:45,809 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:23:46,888 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-02-19 18:23:47,064 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 18:23:47,257 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 18:23:47,423 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-02-19 18:23:48,262 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-02-19 18:23:48,515 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-02-19 18:23:48,680 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-02-19 18:23:48,898 WARN L202 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-02-19 18:23:49,468 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-02-19 18:23:50,637 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-02-19 18:23:51,125 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 18:23:51,720 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-19 18:23:52,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:52,215 INFO L93 Difference]: Finished difference Result 1017 states and 2007 transitions. [2021-02-19 18:23:52,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-02-19 18:23:52,216 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:23:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:52,217 INFO L225 Difference]: With dead ends: 1017 [2021-02-19 18:23:52,217 INFO L226 Difference]: Without dead ends: 955 [2021-02-19 18:23:52,218 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-02-19 18:23:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-02-19 18:23:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 421. [2021-02-19 18:23:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.1023809523809525) internal successors, (883), 420 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:52,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 883 transitions. [2021-02-19 18:23:52,223 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 883 transitions. Word has length 33 [2021-02-19 18:23:52,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:52,223 INFO L480 AbstractCegarLoop]: Abstraction has 421 states and 883 transitions. [2021-02-19 18:23:52,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 883 transitions. [2021-02-19 18:23:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:23:52,223 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:52,223 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:52,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:23:52,424 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -685455063, now seen corresponding path program 84 times [2021-02-19 18:23:52,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:52,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042109593] [2021-02-19 18:23:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:23:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042109593] [2021-02-19 18:23:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427564431] [2021-02-19 18:23:52,763 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 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 18:23:52,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 18:23:52,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:23:52,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 18:23:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:53,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:53,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-02-19 18:23:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481511672] [2021-02-19 18:23:53,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:23:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:23:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:23:53,296 INFO L87 Difference]: Start difference. First operand 421 states and 883 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:55,728 INFO L93 Difference]: Finished difference Result 637 states and 1280 transitions. [2021-02-19 18:23:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:23:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:23:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:55,730 INFO L225 Difference]: With dead ends: 637 [2021-02-19 18:23:55,730 INFO L226 Difference]: Without dead ends: 592 [2021-02-19 18:23:55,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=500, Invalid=4470, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:23:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-02-19 18:23:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 327. [2021-02-19 18:23:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.107361963190184) internal successors, (687), 326 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 687 transitions. [2021-02-19 18:23:55,734 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 687 transitions. Word has length 33 [2021-02-19 18:23:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:55,734 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 687 transitions. [2021-02-19 18:23:55,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 687 transitions. [2021-02-19 18:23:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:23:55,735 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:23:55,735 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:23:55,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 18:23:55,935 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:23:55,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash 855014087, now seen corresponding path program 85 times [2021-02-19 18:23:55,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:55,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852923005] [2021-02-19 18:23:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852923005] [2021-02-19 18:23:56,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476667577] [2021-02-19 18:23:56,292 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 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 18:23:56,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:56,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 18:23:56,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:23:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:56,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:23:56,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-02-19 18:23:56,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274698956] [2021-02-19 18:23:56,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:23:56,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:23:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:23:56,896 INFO L87 Difference]: Start difference. First operand 327 states and 687 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:23:57,918 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:23:58,204 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:24:03,737 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-02-19 18:24:03,938 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-02-19 18:24:04,099 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-02-19 18:24:04,427 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-02-19 18:24:04,579 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-02-19 18:24:05,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:05,737 INFO L93 Difference]: Finished difference Result 914 states and 1871 transitions. [2021-02-19 18:24:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-02-19 18:24:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:24:05,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:05,739 INFO L225 Difference]: With dead ends: 914 [2021-02-19 18:24:05,739 INFO L226 Difference]: Without dead ends: 888 [2021-02-19 18:24:05,739 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1875, Invalid=12167, Unknown=0, NotChecked=0, Total=14042 [2021-02-19 18:24:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-02-19 18:24:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 371. [2021-02-19 18:24:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.0945945945945947) internal successors, (775), 370 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 775 transitions. [2021-02-19 18:24:05,744 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 775 transitions. Word has length 33 [2021-02-19 18:24:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:05,744 INFO L480 AbstractCegarLoop]: Abstraction has 371 states and 775 transitions. [2021-02-19 18:24:05,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:05,744 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 775 transitions. [2021-02-19 18:24:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:05,744 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:05,744 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:05,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 18:24:05,944 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1453275995, now seen corresponding path program 86 times [2021-02-19 18:24:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145811631] [2021-02-19 18:24:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145811631] [2021-02-19 18:24:06,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176306581] [2021-02-19 18:24:06,307 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 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 18:24:06,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:06,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:06,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:06,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:06,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456767281] [2021-02-19 18:24:06,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:06,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:06,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:06,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:06,887 INFO L87 Difference]: Start difference. First operand 371 states and 775 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:09,578 INFO L93 Difference]: Finished difference Result 795 states and 1605 transitions. [2021-02-19 18:24:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:24:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:09,580 INFO L225 Difference]: With dead ends: 795 [2021-02-19 18:24:09,580 INFO L226 Difference]: Without dead ends: 734 [2021-02-19 18:24:09,580 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:24:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-02-19 18:24:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 476. [2021-02-19 18:24:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.1789473684210527) internal successors, (1035), 475 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1035 transitions. [2021-02-19 18:24:09,585 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1035 transitions. Word has length 35 [2021-02-19 18:24:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:09,585 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 1035 transitions. [2021-02-19 18:24:09,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1035 transitions. [2021-02-19 18:24:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:09,586 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:09,586 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:09,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 18:24:09,801 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:09,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash -795189277, now seen corresponding path program 87 times [2021-02-19 18:24:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:09,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567086891] [2021-02-19 18:24:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:10,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567086891] [2021-02-19 18:24:10,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387225234] [2021-02-19 18:24:10,170 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 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 18:24:10,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:24:10,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:10,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:10,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:10,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:10,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679083692] [2021-02-19 18:24:10,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:10,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:10,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:10,761 INFO L87 Difference]: Start difference. First operand 476 states and 1035 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:13,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:13,801 INFO L93 Difference]: Finished difference Result 821 states and 1648 transitions. [2021-02-19 18:24:13,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 18:24:13,802 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:13,802 INFO L225 Difference]: With dead ends: 821 [2021-02-19 18:24:13,802 INFO L226 Difference]: Without dead ends: 771 [2021-02-19 18:24:13,803 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:24:13,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-02-19 18:24:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 478. [2021-02-19 18:24:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-02-19 18:24:13,808 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-02-19 18:24:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:13,808 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-02-19 18:24:13,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:13,808 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-02-19 18:24:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:13,809 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:13,809 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:14,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-02-19 18:24:14,009 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 234973223, now seen corresponding path program 88 times [2021-02-19 18:24:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:14,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178555298] [2021-02-19 18:24:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178555298] [2021-02-19 18:24:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762429922] [2021-02-19 18:24:14,402 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 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 18:24:14,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:24:14,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:14,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:15,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:15,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:15,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511325911] [2021-02-19 18:24:15,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:15,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:15,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:15,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:15,025 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:18,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:18,404 INFO L93 Difference]: Finished difference Result 819 states and 1646 transitions. [2021-02-19 18:24:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:24:18,405 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:18,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:18,406 INFO L225 Difference]: With dead ends: 819 [2021-02-19 18:24:18,406 INFO L226 Difference]: Without dead ends: 775 [2021-02-19 18:24:18,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-02-19 18:24:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-02-19 18:24:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 480. [2021-02-19 18:24:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.1774530271398747) internal successors, (1043), 479 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1043 transitions. [2021-02-19 18:24:18,412 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1043 transitions. Word has length 35 [2021-02-19 18:24:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:18,412 INFO L480 AbstractCegarLoop]: Abstraction has 480 states and 1043 transitions. [2021-02-19 18:24:18,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1043 transitions. [2021-02-19 18:24:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:18,413 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:18,413 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:18,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:18,626 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1331016043, now seen corresponding path program 89 times [2021-02-19 18:24:18,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:18,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128512634] [2021-02-19 18:24:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:19,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128512634] [2021-02-19 18:24:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401943143] [2021-02-19 18:24:19,045 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:19,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:24:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:19,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:19,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:19,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:19,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654842246] [2021-02-19 18:24:19,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:19,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:19,642 INFO L87 Difference]: Start difference. First operand 480 states and 1043 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:23,504 INFO L93 Difference]: Finished difference Result 817 states and 1644 transitions. [2021-02-19 18:24:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-02-19 18:24:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:23,506 INFO L225 Difference]: With dead ends: 817 [2021-02-19 18:24:23,506 INFO L226 Difference]: Without dead ends: 779 [2021-02-19 18:24:23,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 18:24:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-19 18:24:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 482. [2021-02-19 18:24:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.176715176715177) internal successors, (1047), 481 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1047 transitions. [2021-02-19 18:24:23,511 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1047 transitions. Word has length 35 [2021-02-19 18:24:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:23,512 INFO L480 AbstractCegarLoop]: Abstraction has 482 states and 1047 transitions. [2021-02-19 18:24:23,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:23,512 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1047 transitions. [2021-02-19 18:24:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:23,512 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:23,512 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:23,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:23,713 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2131526737, now seen corresponding path program 90 times [2021-02-19 18:24:23,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:23,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031774844] [2021-02-19 18:24:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:24,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031774844] [2021-02-19 18:24:24,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130485314] [2021-02-19 18:24:24,146 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 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 18:24:24,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:24:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:24,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 18:24:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:24,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:24,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:24,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612190559] [2021-02-19 18:24:24,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:24,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:24,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:24,993 INFO L87 Difference]: Start difference. First operand 482 states and 1047 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:30,798 INFO L93 Difference]: Finished difference Result 876 states and 1753 transitions. [2021-02-19 18:24:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-02-19 18:24:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:30,800 INFO L225 Difference]: With dead ends: 876 [2021-02-19 18:24:30,800 INFO L226 Difference]: Without dead ends: 831 [2021-02-19 18:24:30,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-02-19 18:24:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-02-19 18:24:30,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 485. [2021-02-19 18:24:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1797520661157024) internal successors, (1055), 484 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:30,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1055 transitions. [2021-02-19 18:24:30,806 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1055 transitions. Word has length 35 [2021-02-19 18:24:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:30,806 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 1055 transitions. [2021-02-19 18:24:30,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1055 transitions. [2021-02-19 18:24:30,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:30,806 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:30,806 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:31,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:31,007 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash 898512699, now seen corresponding path program 91 times [2021-02-19 18:24:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:31,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245460999] [2021-02-19 18:24:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245460999] [2021-02-19 18:24:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173232003] [2021-02-19 18:24:31,556 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 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 18:24:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:31,576 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:31,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:32,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:32,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:32,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601486238] [2021-02-19 18:24:32,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:32,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:32,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:32,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:32,195 INFO L87 Difference]: Start difference. First operand 485 states and 1055 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:35,791 INFO L93 Difference]: Finished difference Result 740 states and 1493 transitions. [2021-02-19 18:24:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:24:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:35,792 INFO L225 Difference]: With dead ends: 740 [2021-02-19 18:24:35,792 INFO L226 Difference]: Without dead ends: 713 [2021-02-19 18:24:35,793 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-02-19 18:24:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-02-19 18:24:35,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 478. [2021-02-19 18:24:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.1781970649895177) internal successors, (1039), 477 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1039 transitions. [2021-02-19 18:24:35,797 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1039 transitions. Word has length 35 [2021-02-19 18:24:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:35,797 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1039 transitions. [2021-02-19 18:24:35,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1039 transitions. [2021-02-19 18:24:35,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:35,798 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:35,798 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:35,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-02-19 18:24:35,998 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:35,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:35,998 INFO L82 PathProgramCache]: Analyzing trace with hash -695246803, now seen corresponding path program 92 times [2021-02-19 18:24:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:35,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716193516] [2021-02-19 18:24:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:36,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716193516] [2021-02-19 18:24:36,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115626902] [2021-02-19 18:24:36,406 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 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 18:24:36,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:36,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:37,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:37,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:37,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713210215] [2021-02-19 18:24:37,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:37,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:37,043 INFO L87 Difference]: Start difference. First operand 478 states and 1039 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:40,468 INFO L93 Difference]: Finished difference Result 782 states and 1573 transitions. [2021-02-19 18:24:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 18:24:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:40,470 INFO L225 Difference]: With dead ends: 782 [2021-02-19 18:24:40,470 INFO L226 Difference]: Without dead ends: 738 [2021-02-19 18:24:40,471 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:24:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-02-19 18:24:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 484. [2021-02-19 18:24:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.175983436853002) internal successors, (1051), 483 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1051 transitions. [2021-02-19 18:24:40,476 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1051 transitions. Word has length 35 [2021-02-19 18:24:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:40,476 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 1051 transitions. [2021-02-19 18:24:40,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1051 transitions. [2021-02-19 18:24:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:40,476 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:40,476 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:40,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:40,686 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash 400796017, now seen corresponding path program 93 times [2021-02-19 18:24:40,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:40,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716167958] [2021-02-19 18:24:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:41,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716167958] [2021-02-19 18:24:41,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420463246] [2021-02-19 18:24:41,113 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 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 18:24:41,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:24:41,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:41,133 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 18:24:41,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:42,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:42,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:42,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702540575] [2021-02-19 18:24:42,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:42,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:42,242 INFO L87 Difference]: Start difference. First operand 484 states and 1051 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:47,455 INFO L93 Difference]: Finished difference Result 783 states and 1585 transitions. [2021-02-19 18:24:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-02-19 18:24:47,457 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:47,457 INFO L225 Difference]: With dead ends: 783 [2021-02-19 18:24:47,457 INFO L226 Difference]: Without dead ends: 745 [2021-02-19 18:24:47,458 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2906 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1102, Invalid=9404, Unknown=0, NotChecked=0, Total=10506 [2021-02-19 18:24:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-02-19 18:24:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 490. [2021-02-19 18:24:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.18200408997955) internal successors, (1067), 489 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1067 transitions. [2021-02-19 18:24:47,462 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1067 transitions. Word has length 35 [2021-02-19 18:24:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:47,463 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 1067 transitions. [2021-02-19 18:24:47,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1067 transitions. [2021-02-19 18:24:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:47,463 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:47,463 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:47,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 18:24:47,663 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:47,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1233220533, now seen corresponding path program 94 times [2021-02-19 18:24:47,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:47,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929747731] [2021-02-19 18:24:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:48,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929747731] [2021-02-19 18:24:48,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449804075] [2021-02-19 18:24:48,136 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 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 18:24:48,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:24:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:48,153 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:48,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:48,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:48,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089754636] [2021-02-19 18:24:48,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:48,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:48,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:48,797 INFO L87 Difference]: Start difference. First operand 490 states and 1067 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:53,207 INFO L93 Difference]: Finished difference Result 853 states and 1717 transitions. [2021-02-19 18:24:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 18:24:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:53,209 INFO L225 Difference]: With dead ends: 853 [2021-02-19 18:24:53,209 INFO L226 Difference]: Without dead ends: 808 [2021-02-19 18:24:53,210 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 18:24:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-02-19 18:24:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 494. [2021-02-19 18:24:53,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.186612576064909) internal successors, (1078), 493 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1078 transitions. [2021-02-19 18:24:53,215 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1078 transitions. Word has length 35 [2021-02-19 18:24:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:53,215 INFO L480 AbstractCegarLoop]: Abstraction has 494 states and 1078 transitions. [2021-02-19 18:24:53,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1078 transitions. [2021-02-19 18:24:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:53,216 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:53,216 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:53,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:53,430 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -31707327, now seen corresponding path program 95 times [2021-02-19 18:24:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:53,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519407382] [2021-02-19 18:24:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:53,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519407382] [2021-02-19 18:24:53,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053575141] [2021-02-19 18:24:53,917 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 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 18:24:53,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:24:53,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:53,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:24:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:54,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:54,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:24:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913820979] [2021-02-19 18:24:54,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:24:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:24:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:54,618 INFO L87 Difference]: Start difference. First operand 494 states and 1078 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:58,603 INFO L93 Difference]: Finished difference Result 746 states and 1513 transitions. [2021-02-19 18:24:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 18:24:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:24:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:58,605 INFO L225 Difference]: With dead ends: 746 [2021-02-19 18:24:58,605 INFO L226 Difference]: Without dead ends: 719 [2021-02-19 18:24:58,605 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 18:24:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-02-19 18:24:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 388. [2021-02-19 18:24:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.111111111111111) internal successors, (817), 387 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 817 transitions. [2021-02-19 18:24:58,609 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 817 transitions. Word has length 35 [2021-02-19 18:24:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:58,609 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 817 transitions. [2021-02-19 18:24:58,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:24:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 817 transitions. [2021-02-19 18:24:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:24:58,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:58,610 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:58,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:58,810 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash -716572883, now seen corresponding path program 96 times [2021-02-19 18:24:58,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:58,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865838169] [2021-02-19 18:24:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:58,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:59,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865838169] [2021-02-19 18:24:59,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809641524] [2021-02-19 18:24:59,247 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:59,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 18:24:59,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:59,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-02-19 18:24:59,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:00,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:00,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:25:00,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619067274] [2021-02-19 18:25:00,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:25:00,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:00,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:25:00,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:00,198 INFO L87 Difference]: Start difference. First operand 388 states and 817 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:05,430 INFO L93 Difference]: Finished difference Result 628 states and 1221 transitions. [2021-02-19 18:25:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:25:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:05,432 INFO L225 Difference]: With dead ends: 628 [2021-02-19 18:25:05,432 INFO L226 Difference]: Without dead ends: 590 [2021-02-19 18:25:05,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 18:25:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-02-19 18:25:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 392. [2021-02-19 18:25:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1099744245524295) internal successors, (825), 391 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 825 transitions. [2021-02-19 18:25:05,436 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 825 transitions. Word has length 35 [2021-02-19 18:25:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:05,436 INFO L480 AbstractCegarLoop]: Abstraction has 392 states and 825 transitions. [2021-02-19 18:25:05,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 825 transitions. [2021-02-19 18:25:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:05,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:05,437 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:05,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:05,637 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:05,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:05,638 INFO L82 PathProgramCache]: Analyzing trace with hash 115851633, now seen corresponding path program 97 times [2021-02-19 18:25:05,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:05,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107058059] [2021-02-19 18:25:05,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107058059] [2021-02-19 18:25:06,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774881368] [2021-02-19 18:25:06,202 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 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 18:25:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:06,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:25:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:06,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:06,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:25:06,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021795558] [2021-02-19 18:25:06,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:25:06,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:25:06,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:06,985 INFO L87 Difference]: Start difference. First operand 392 states and 825 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:11,131 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 18:25:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:11,917 INFO L93 Difference]: Finished difference Result 697 states and 1347 transitions. [2021-02-19 18:25:11,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-02-19 18:25:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:11,919 INFO L225 Difference]: With dead ends: 697 [2021-02-19 18:25:11,919 INFO L226 Difference]: Without dead ends: 652 [2021-02-19 18:25:11,920 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 18:25:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-02-19 18:25:11,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 394. [2021-02-19 18:25:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1119592875318065) internal successors, (830), 393 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 830 transitions. [2021-02-19 18:25:11,924 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 830 transitions. Word has length 35 [2021-02-19 18:25:11,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:11,924 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 830 transitions. [2021-02-19 18:25:11,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 830 transitions. [2021-02-19 18:25:11,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:11,925 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:11,925 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:12,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:12,125 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1149076227, now seen corresponding path program 98 times [2021-02-19 18:25:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:12,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986137646] [2021-02-19 18:25:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:12,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:12,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986137646] [2021-02-19 18:25:12,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857587934] [2021-02-19 18:25:12,748 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 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 18:25:12,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:12,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:12,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:25:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:13,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:13,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:25:13,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229202737] [2021-02-19 18:25:13,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:25:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:25:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:13,567 INFO L87 Difference]: Start difference. First operand 394 states and 830 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:18,009 INFO L93 Difference]: Finished difference Result 615 states and 1206 transitions. [2021-02-19 18:25:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 18:25:18,010 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:18,011 INFO L225 Difference]: With dead ends: 615 [2021-02-19 18:25:18,011 INFO L226 Difference]: Without dead ends: 595 [2021-02-19 18:25:18,011 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-02-19 18:25:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-02-19 18:25:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 382. [2021-02-19 18:25:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.0918635170603674) internal successors, (797), 381 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 797 transitions. [2021-02-19 18:25:18,015 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 797 transitions. Word has length 35 [2021-02-19 18:25:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:18,015 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 797 transitions. [2021-02-19 18:25:18,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:18,016 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 797 transitions. [2021-02-19 18:25:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:18,016 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:18,016 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:18,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:18,230 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1614918099, now seen corresponding path program 99 times [2021-02-19 18:25:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:18,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418424399] [2021-02-19 18:25:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:18,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418424399] [2021-02-19 18:25:18,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289532598] [2021-02-19 18:25:18,653 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 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 18:25:18,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:25:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:18,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 18:25:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:19,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:19,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:25:19,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522905455] [2021-02-19 18:25:19,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:25:19,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:25:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:19,524 INFO L87 Difference]: Start difference. First operand 382 states and 797 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:26,202 INFO L93 Difference]: Finished difference Result 719 states and 1416 transitions. [2021-02-19 18:25:26,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 18:25:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:26,204 INFO L225 Difference]: With dead ends: 719 [2021-02-19 18:25:26,204 INFO L226 Difference]: Without dead ends: 671 [2021-02-19 18:25:26,204 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3822 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1338, Invalid=10434, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 18:25:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-02-19 18:25:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 398. [2021-02-19 18:25:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.0957178841309823) internal successors, (832), 397 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 832 transitions. [2021-02-19 18:25:26,209 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 832 transitions. Word has length 35 [2021-02-19 18:25:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:26,209 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 832 transitions. [2021-02-19 18:25:26,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 832 transitions. [2021-02-19 18:25:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:26,209 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:26,209 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:26,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-02-19 18:25:26,411 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1415121337, now seen corresponding path program 100 times [2021-02-19 18:25:26,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:26,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229833222] [2021-02-19 18:25:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229833222] [2021-02-19 18:25:26,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707759713] [2021-02-19 18:25:26,855 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 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 18:25:26,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:26,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:26,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:25:26,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:27,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:27,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 18:25:27,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128981659] [2021-02-19 18:25:27,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:25:27,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:25:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:27,687 INFO L87 Difference]: Start difference. First operand 398 states and 832 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:33,256 INFO L93 Difference]: Finished difference Result 719 states and 1410 transitions. [2021-02-19 18:25:33,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:25:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:33,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:33,258 INFO L225 Difference]: With dead ends: 719 [2021-02-19 18:25:33,258 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 18:25:33,259 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1245, Invalid=8457, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 18:25:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 18:25:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 363. [2021-02-19 18:25:33,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.0552486187845305) internal successors, (744), 362 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 744 transitions. [2021-02-19 18:25:33,263 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 744 transitions. Word has length 35 [2021-02-19 18:25:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:33,263 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 744 transitions. [2021-02-19 18:25:33,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 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 18:25:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 744 transitions. [2021-02-19 18:25:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:33,263 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:33,263 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:33,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 18:25:33,478 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1734293185, now seen corresponding path program 101 times [2021-02-19 18:25:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:33,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128822570] [2021-02-19 18:25:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128822570] [2021-02-19 18:25:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78194590] [2021-02-19 18:25:34,075 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 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 18:25:34,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 18:25:34,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:34,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:25:34,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:35,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:35,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-02-19 18:25:35,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302519122] [2021-02-19 18:25:35,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:25:35,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:25:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:25:35,122 INFO L87 Difference]: Start difference. First operand 363 states and 744 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:35,522 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-02-19 18:25:35,814 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 18:25:36,198 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 18:25:36,514 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 18:25:36,843 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-02-19 18:25:37,649 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 24 [2021-02-19 18:25:38,713 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-02-19 18:25:39,507 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-02-19 18:25:39,847 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-02-19 18:25:40,203 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-02-19 18:25:40,461 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-02-19 18:25:40,596 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-02-19 18:25:40,799 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:25:41,467 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:25:41,706 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:25:41,931 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 18:25:42,329 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:25:42,625 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-02-19 18:25:42,962 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 18:25:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:43,238 INFO L93 Difference]: Finished difference Result 667 states and 1337 transitions. [2021-02-19 18:25:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 18:25:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:43,241 INFO L225 Difference]: With dead ends: 667 [2021-02-19 18:25:43,241 INFO L226 Difference]: Without dead ends: 641 [2021-02-19 18:25:43,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2194 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=874, Invalid=6098, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:25:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-02-19 18:25:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 403. [2021-02-19 18:25:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.0497512437810945) internal successors, (824), 402 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 824 transitions. [2021-02-19 18:25:43,245 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 824 transitions. Word has length 35 [2021-02-19 18:25:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:43,245 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 824 transitions. [2021-02-19 18:25:43,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 824 transitions. [2021-02-19 18:25:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 18:25:43,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:43,246 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:43,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 18:25:43,451 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1214507071, now seen corresponding path program 102 times [2021-02-19 18:25:43,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:43,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085741069] [2021-02-19 18:25:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:43,665 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-02-19 18:25:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:25:44,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085741069] [2021-02-19 18:25:44,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210292154] [2021-02-19 18:25:44,079 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 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 18:25:44,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:25:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:44,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 18:25:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:45,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:45,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2021-02-19 18:25:45,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868587128] [2021-02-19 18:25:45,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:45,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:45,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:45,208 INFO L87 Difference]: Start difference. First operand 403 states and 824 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:45,674 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-02-19 18:25:45,843 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 18:25:46,468 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-02-19 18:25:48,170 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2021-02-19 18:25:48,497 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 18:25:48,625 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 18:25:50,148 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-02-19 18:25:50,421 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-02-19 18:25:50,636 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-02-19 18:25:50,819 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-02-19 18:25:51,736 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-02-19 18:25:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:53,210 INFO L93 Difference]: Finished difference Result 682 states and 1367 transitions. [2021-02-19 18:25:53,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 18:25:53,212 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 18:25:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:53,213 INFO L225 Difference]: With dead ends: 682 [2021-02-19 18:25:53,213 INFO L226 Difference]: Without dead ends: 656 [2021-02-19 18:25:53,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=800, Invalid=5842, Unknown=0, NotChecked=0, Total=6642 [2021-02-19 18:25:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-02-19 18:25:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 407. [2021-02-19 18:25:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.0492610837438425) internal successors, (832), 406 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 832 transitions. [2021-02-19 18:25:53,217 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 832 transitions. Word has length 35 [2021-02-19 18:25:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:53,217 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 832 transitions. [2021-02-19 18:25:53,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 832 transitions. [2021-02-19 18:25:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:25:53,218 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:53,218 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:53,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 18:25:53,418 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash -677225429, now seen corresponding path program 103 times [2021-02-19 18:25:53,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:53,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981058587] [2021-02-19 18:25:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:25:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981058587] [2021-02-19 18:25:53,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679408312] [2021-02-19 18:25:53,551 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 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 18:25:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-02-19 18:25:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-19 18:25:53,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:53,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 18:25:53,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474454374] [2021-02-19 18:25:53,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:25:53,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:25:53,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:25:53,758 INFO L87 Difference]: Start difference. First operand 407 states and 832 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:54,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:54,053 INFO L93 Difference]: Finished difference Result 628 states and 1249 transitions. [2021-02-19 18:25:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:25:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:25:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:54,055 INFO L225 Difference]: With dead ends: 628 [2021-02-19 18:25:54,055 INFO L226 Difference]: Without dead ends: 580 [2021-02-19 18:25:54,055 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:25:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-02-19 18:25:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 433. [2021-02-19 18:25:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.060185185185185) internal successors, (890), 432 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 890 transitions. [2021-02-19 18:25:54,059 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 890 transitions. Word has length 37 [2021-02-19 18:25:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:54,059 INFO L480 AbstractCegarLoop]: Abstraction has 433 states and 890 transitions. [2021-02-19 18:25:54,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:54,059 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 890 transitions. [2021-02-19 18:25:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:25:54,060 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:54,060 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:54,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-02-19 18:25:54,260 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:54,261 INFO L82 PathProgramCache]: Analyzing trace with hash -298748235, now seen corresponding path program 104 times [2021-02-19 18:25:54,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:54,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174863155] [2021-02-19 18:25:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:55,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174863155] [2021-02-19 18:25:55,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726393076] [2021-02-19 18:25:55,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:25:55,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:55,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:55,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-02-19 18:25:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:56,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:56,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-02-19 18:25:56,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336198973] [2021-02-19 18:25:56,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:25:56,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:56,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:25:56,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:25:56,187 INFO L87 Difference]: Start difference. First operand 433 states and 890 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 18:25:56,625 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:25:56,793 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 18:25:59,929 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 18:26:00,687 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-02-19 18:26:00,945 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2021-02-19 18:26:01,203 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 18:26:01,831 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-02-19 18:26:02,177 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-02-19 18:26:02,395 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 18:26:02,667 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-02-19 18:26:03,027 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 18:26:04,021 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:26:04,207 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-02-19 18:26:04,523 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-02-19 18:26:04,837 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-02-19 18:26:05,739 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2021-02-19 18:26:06,106 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 18:26:06,300 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 18:26:06,680 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 18:26:06,844 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:26:07,067 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:26:07,253 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-02-19 18:26:07,477 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-02-19 18:26:08,802 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:26:08,946 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 18:26:09,244 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:26:09,439 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:26:09,583 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:26:09,805 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:26:10,042 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:26:10,285 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:26:10,670 WARN L202 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 18:26:10,969 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 18:26:11,257 WARN L202 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-02-19 18:26:11,525 WARN L202 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-02-19 18:26:11,894 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-02-19 18:26:12,588 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 24 [2021-02-19 18:26:12,757 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 21 [2021-02-19 18:26:13,075 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:26:13,245 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:26:13,440 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:26:13,940 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-02-19 18:26:14,307 WARN L202 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 18:26:14,727 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-02-19 18:26:15,079 WARN L202 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 18:26:15,537 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 18:26:15,802 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-02-19 18:26:16,404 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 18:26:17,012 WARN L202 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-02-19 18:26:17,626 WARN L202 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-02-19 18:26:17,975 WARN L202 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-02-19 18:26:18,475 WARN L202 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-02-19 18:26:18,991 WARN L202 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 35 [2021-02-19 18:26:19,789 WARN L202 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-02-19 18:26:20,344 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 18:26:20,861 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-02-19 18:26:21,008 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:26:21,152 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 18:26:21,472 WARN L202 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:26:21,699 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-02-19 18:26:21,995 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-02-19 18:26:22,802 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 18:26:24,432 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 18:26:24,879 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 18:26:25,469 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 18:26:25,779 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 18:26:26,187 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 18:26:27,056 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-02-19 18:26:27,239 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:26:27,980 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2021-02-19 18:26:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:28,144 INFO L93 Difference]: Finished difference Result 1610 states and 3193 transitions. [2021-02-19 18:26:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-02-19 18:26:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:26:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:28,148 INFO L225 Difference]: With dead ends: 1610 [2021-02-19 18:26:28,148 INFO L226 Difference]: Without dead ends: 1542 [2021-02-19 18:26:28,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-02-19 18:26:28,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-02-19 18:26:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 593. [2021-02-19 18:26:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.097972972972973) internal successors, (1242), 592 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1242 transitions. [2021-02-19 18:26:28,157 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1242 transitions. Word has length 37 [2021-02-19 18:26:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:28,157 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1242 transitions. [2021-02-19 18:26:28,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 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 18:26:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1242 transitions. [2021-02-19 18:26:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:26:28,158 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:28,158 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:28,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-02-19 18:26:28,373 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:28,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1790548069, now seen corresponding path program 105 times [2021-02-19 18:26:28,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:28,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418357028] [2021-02-19 18:26:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:26:29,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418357028] [2021-02-19 18:26:29,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382851533] [2021-02-19 18:26:29,132 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 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 18:26:29,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 18:26:29,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:29,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:26:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:30,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:30,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-02-19 18:26:30,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456594662] [2021-02-19 18:26:30,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:26:30,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:30,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:26:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:26:30,635 INFO L87 Difference]: Start difference. First operand 593 states and 1242 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:30,962 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 18:26:31,311 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-02-19 18:26:31,939 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2021-02-19 18:26:32,938 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-02-19 18:26:34,078 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 18:26:34,714 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 18:26:37,570 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-02-19 18:26:37,935 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-02-19 18:26:39,520 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-02-19 18:26:39,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:39,806 INFO L93 Difference]: Finished difference Result 957 states and 1930 transitions. [2021-02-19 18:26:39,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 18:26:39,809 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:26:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:39,810 INFO L225 Difference]: With dead ends: 957 [2021-02-19 18:26:39,810 INFO L226 Difference]: Without dead ends: 925 [2021-02-19 18:26:39,811 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3442 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=839, Invalid=9463, Unknown=0, NotChecked=0, Total=10302 [2021-02-19 18:26:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-02-19 18:26:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 612. [2021-02-19 18:26:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.0916530278232406) internal successors, (1278), 611 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1278 transitions. [2021-02-19 18:26:39,816 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1278 transitions. Word has length 37 [2021-02-19 18:26:39,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:39,817 INFO L480 AbstractCegarLoop]: Abstraction has 612 states and 1278 transitions. [2021-02-19 18:26:39,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1278 transitions. [2021-02-19 18:26:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:26:39,817 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:39,817 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:40,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:40,032 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1111153611, now seen corresponding path program 106 times [2021-02-19 18:26:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:40,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14011559] [2021-02-19 18:26:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 18:26:40,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14011559] [2021-02-19 18:26:40,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217660548] [2021-02-19 18:26:40,781 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 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 18:26:40,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:26:40,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:40,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:26:40,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:42,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:42,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-02-19 18:26:42,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105010550] [2021-02-19 18:26:42,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:26:42,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:42,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:26:42,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:26:42,208 INFO L87 Difference]: Start difference. First operand 612 states and 1278 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:48,239 INFO L93 Difference]: Finished difference Result 904 states and 1819 transitions. [2021-02-19 18:26:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:26:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:26:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:48,240 INFO L225 Difference]: With dead ends: 904 [2021-02-19 18:26:48,240 INFO L226 Difference]: Without dead ends: 865 [2021-02-19 18:26:48,241 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=465, Invalid=5235, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:26:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-02-19 18:26:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 532. [2021-02-19 18:26:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.096045197740113) internal successors, (1113), 531 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1113 transitions. [2021-02-19 18:26:48,246 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1113 transitions. Word has length 37 [2021-02-19 18:26:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:48,246 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1113 transitions. [2021-02-19 18:26:48,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1113 transitions. [2021-02-19 18:26:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:26:48,246 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:48,247 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:48,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:48,447 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:48,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:48,447 INFO L82 PathProgramCache]: Analyzing trace with hash -827406277, now seen corresponding path program 107 times [2021-02-19 18:26:48,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:48,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59702129] [2021-02-19 18:26:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-02-19 18:26:49,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59702129] [2021-02-19 18:26:49,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038246185] [2021-02-19 18:26:49,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:49,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 18:26:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:49,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 18:26:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-02-19 18:26:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424255075] [2021-02-19 18:26:50,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 18:26:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 18:26:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:26:50,660 INFO L87 Difference]: Start difference. First operand 532 states and 1113 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 18:26:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:56,800 INFO L93 Difference]: Finished difference Result 801 states and 1628 transitions. [2021-02-19 18:26:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 18:26:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:26:56,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:56,803 INFO L225 Difference]: With dead ends: 801 [2021-02-19 18:26:56,804 INFO L226 Difference]: Without dead ends: 762 [2021-02-19 18:26:56,804 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1725 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=484, Invalid=5216, Unknown=0, NotChecked=0, Total=5700 [2021-02-19 18:26:56,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-02-19 18:26:56,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 549. [2021-02-19 18:26:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0948905109489053) internal successors, (1148), 548 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:56,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1148 transitions. [2021-02-19 18:26:56,809 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1148 transitions. Word has length 37 [2021-02-19 18:26:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:56,809 INFO L480 AbstractCegarLoop]: Abstraction has 549 states and 1148 transitions. [2021-02-19 18:26:56,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 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 18:26:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1148 transitions. [2021-02-19 18:26:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:26:56,810 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:56,810 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:57,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 18:26:57,011 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2052628743, now seen corresponding path program 108 times [2021-02-19 18:26:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:57,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355120131] [2021-02-19 18:26:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:57,223 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:26:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:57,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355120131] [2021-02-19 18:26:57,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766654742] [2021-02-19 18:26:57,891 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 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 18:26:57,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 18:26:57,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:57,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-02-19 18:26:57,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:59,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:59,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-02-19 18:26:59,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109964937] [2021-02-19 18:26:59,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:26:59,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:59,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:26:59,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:26:59,447 INFO L87 Difference]: Start difference. First operand 549 states and 1148 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 18:26:59,823 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 18:27:00,089 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:27:00,340 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-02-19 18:27:00,668 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:27:00,866 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 18:27:01,171 WARN L202 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-02-19 18:27:01,361 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-02-19 18:27:01,681 WARN L202 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-02-19 18:27:02,022 WARN L202 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:27:02,700 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2021-02-19 18:27:03,140 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-02-19 18:27:03,614 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:27:03,900 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:27:04,129 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-02-19 18:27:04,358 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:27:04,812 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:27:05,036 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-02-19 18:27:05,257 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:27:05,504 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-02-19 18:27:05,693 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-02-19 18:27:05,932 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 18:27:06,314 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-02-19 18:27:06,564 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-02-19 18:27:06,788 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-02-19 18:27:06,962 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-02-19 18:27:07,185 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-02-19 18:27:07,424 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-02-19 18:27:07,721 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-02-19 18:27:07,969 WARN L202 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-02-19 18:27:08,141 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-02-19 18:27:08,295 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:27:08,460 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-02-19 18:27:08,682 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:27:08,942 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 18:27:09,478 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-02-19 18:27:09,660 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-02-19 18:27:10,044 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 18:27:10,218 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-02-19 18:27:10,448 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:27:10,656 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-02-19 18:27:10,881 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-02-19 18:27:11,147 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2021-02-19 18:27:11,407 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 22 [2021-02-19 18:27:11,687 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 18:27:12,071 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 18:27:12,305 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 18:27:12,468 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-02-19 18:27:12,774 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 18:27:12,958 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 18:27:13,381 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-02-19 18:27:13,656 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-02-19 18:27:13,838 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 18:27:14,008 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-02-19 18:27:14,206 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2021-02-19 18:27:14,568 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 18:27:14,803 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-02-19 18:27:15,429 WARN L202 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-02-19 18:27:15,742 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-02-19 18:27:16,182 WARN L202 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 18:27:16,703 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-02-19 18:27:17,102 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-02-19 18:27:17,424 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-02-19 18:27:17,660 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-02-19 18:27:17,838 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 21 [2021-02-19 18:27:18,327 WARN L202 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-02-19 18:27:18,767 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-02-19 18:27:19,205 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 18:27:19,789 WARN L202 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-02-19 18:27:20,002 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-02-19 18:27:20,381 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-02-19 18:27:20,792 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-02-19 18:27:21,459 WARN L202 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-02-19 18:27:22,043 WARN L202 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-02-19 18:27:22,363 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-02-19 18:27:23,134 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-02-19 18:27:23,643 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 18:27:23,939 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-02-19 18:27:24,319 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-02-19 18:27:24,842 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-02-19 18:27:25,370 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-02-19 18:27:25,761 WARN L202 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-02-19 18:27:26,097 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-02-19 18:27:26,372 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-02-19 18:27:26,763 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-02-19 18:27:26,978 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-02-19 18:27:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:27,173 INFO L93 Difference]: Finished difference Result 1528 states and 3121 transitions. [2021-02-19 18:27:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-02-19 18:27:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 18:27:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:27,177 INFO L225 Difference]: With dead ends: 1528 [2021-02-19 18:27:27,177 INFO L226 Difference]: Without dead ends: 1502 [2021-02-19 18:27:27,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=2579, Invalid=18591, Unknown=0, NotChecked=0, Total=21170 [2021-02-19 18:27:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-02-19 18:27:27,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 569. [2021-02-19 18:27:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 2.091549295774648) internal successors, (1188), 568 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1188 transitions. [2021-02-19 18:27:27,185 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1188 transitions. Word has length 37 [2021-02-19 18:27:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:27,186 INFO L480 AbstractCegarLoop]: Abstraction has 569 states and 1188 transitions. [2021-02-19 18:27:27,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 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 18:27:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1188 transitions. [2021-02-19 18:27:27,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:27:27,186 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:27,186 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:27,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:27,387 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:27,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:27,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1385158551, now seen corresponding path program 109 times [2021-02-19 18:27:27,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:27,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379967989] [2021-02-19 18:27:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:28,115 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:27:28,277 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:27:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:28,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379967989] [2021-02-19 18:27:28,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049124263] [2021-02-19 18:27:28,389 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 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 18:27:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:28,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:27:28,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:29,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:29,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:27:29,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126592188] [2021-02-19 18:27:29,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:27:29,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:27:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:27:29,972 INFO L87 Difference]: Start difference. First operand 569 states and 1188 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:35,295 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 18:27:37,108 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:27:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:37,962 INFO L93 Difference]: Finished difference Result 1117 states and 2277 transitions. [2021-02-19 18:27:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-02-19 18:27:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:27:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:37,966 INFO L225 Difference]: With dead ends: 1117 [2021-02-19 18:27:37,966 INFO L226 Difference]: Without dead ends: 1050 [2021-02-19 18:27:37,967 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-02-19 18:27:37,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-02-19 18:27:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 697. [2021-02-19 18:27:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.1695402298850577) internal successors, (1510), 696 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1510 transitions. [2021-02-19 18:27:37,974 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1510 transitions. Word has length 39 [2021-02-19 18:27:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:37,974 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 1510 transitions. [2021-02-19 18:27:37,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1510 transitions. [2021-02-19 18:27:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:27:37,975 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:37,975 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:38,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:38,176 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:38,176 INFO L82 PathProgramCache]: Analyzing trace with hash 978582047, now seen corresponding path program 110 times [2021-02-19 18:27:38,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:38,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941336605] [2021-02-19 18:27:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:38,910 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:27:39,077 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:27:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941336605] [2021-02-19 18:27:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420135924] [2021-02-19 18:27:39,196 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 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 18:27:39,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:27:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:39,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:27:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:40,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:40,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:27:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460083394] [2021-02-19 18:27:40,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:27:40,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:27:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:27:40,886 INFO L87 Difference]: Start difference. First operand 697 states and 1510 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:48,991 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:27:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:49,914 INFO L93 Difference]: Finished difference Result 1149 states and 2330 transitions. [2021-02-19 18:27:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 18:27:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:27:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:49,919 INFO L225 Difference]: With dead ends: 1149 [2021-02-19 18:27:49,919 INFO L226 Difference]: Without dead ends: 1093 [2021-02-19 18:27:49,920 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 18:27:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-02-19 18:27:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 699. [2021-02-19 18:27:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 2.169054441260745) internal successors, (1514), 698 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1514 transitions. [2021-02-19 18:27:49,927 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1514 transitions. Word has length 39 [2021-02-19 18:27:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:49,927 INFO L480 AbstractCegarLoop]: Abstraction has 699 states and 1514 transitions. [2021-02-19 18:27:49,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1514 transitions. [2021-02-19 18:27:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:27:49,927 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:49,927 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:50,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:50,128 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1172700829, now seen corresponding path program 111 times [2021-02-19 18:27:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:50,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315880175] [2021-02-19 18:27:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:50,904 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:27:51,082 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:27:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315880175] [2021-02-19 18:27:51,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29514412] [2021-02-19 18:27:51,207 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 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 18:27:51,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:27:51,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:51,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:27:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:52,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:52,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:27:52,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950108482] [2021-02-19 18:27:52,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:27:52,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:52,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:27:52,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:27:52,934 INFO L87 Difference]: Start difference. First operand 699 states and 1514 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:59,214 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-02-19 18:28:00,858 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 18:28:01,608 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:28:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:02,504 INFO L93 Difference]: Finished difference Result 1147 states and 2328 transitions. [2021-02-19 18:28:02,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 18:28:02,507 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:28:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:02,508 INFO L225 Difference]: With dead ends: 1147 [2021-02-19 18:28:02,508 INFO L226 Difference]: Without dead ends: 1097 [2021-02-19 18:28:02,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-02-19 18:28:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-02-19 18:28:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 701. [2021-02-19 18:28:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1685714285714286) internal successors, (1518), 700 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1518 transitions. [2021-02-19 18:28:02,522 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1518 transitions. Word has length 39 [2021-02-19 18:28:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:02,522 INFO L480 AbstractCegarLoop]: Abstraction has 701 states and 1518 transitions. [2021-02-19 18:28:02,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1518 transitions. [2021-02-19 18:28:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:28:02,523 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:02,523 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:02,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-02-19 18:28:02,723 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -142538329, now seen corresponding path program 112 times [2021-02-19 18:28:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:02,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709842896] [2021-02-19 18:28:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:03,477 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:28:03,651 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:28:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709842896] [2021-02-19 18:28:03,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962197790] [2021-02-19 18:28:03,771 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 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 18:28:03,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:28:03,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:03,791 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:28:03,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:05,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:05,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:28:05,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599581947] [2021-02-19 18:28:05,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:28:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:28:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:28:05,390 INFO L87 Difference]: Start difference. First operand 701 states and 1518 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:12,936 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2021-02-19 18:28:13,968 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 18:28:14,749 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:28:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:15,549 INFO L93 Difference]: Finished difference Result 1145 states and 2326 transitions. [2021-02-19 18:28:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-02-19 18:28:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:28:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:15,554 INFO L225 Difference]: With dead ends: 1145 [2021-02-19 18:28:15,554 INFO L226 Difference]: Without dead ends: 1101 [2021-02-19 18:28:15,555 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1433, Invalid=10557, Unknown=0, NotChecked=0, Total=11990 [2021-02-19 18:28:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-02-19 18:28:15,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 703. [2021-02-19 18:28:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 2.168091168091168) internal successors, (1522), 702 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1522 transitions. [2021-02-19 18:28:15,562 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1522 transitions. Word has length 39 [2021-02-19 18:28:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:15,562 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 1522 transitions. [2021-02-19 18:28:15,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1522 transitions. [2021-02-19 18:28:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:28:15,563 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:15,563 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:15,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 18:28:15,764 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:15,764 INFO L82 PathProgramCache]: Analyzing trace with hash 953504491, now seen corresponding path program 113 times [2021-02-19 18:28:15,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:15,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133607670] [2021-02-19 18:28:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:16,555 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:28:16,735 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:28:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:16,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133607670] [2021-02-19 18:28:16,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035452525] [2021-02-19 18:28:16,863 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 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 18:28:16,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-02-19 18:28:16,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:16,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:28:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:18,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:18,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:28:18,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492200497] [2021-02-19 18:28:18,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:28:18,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:28:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:28:18,647 INFO L87 Difference]: Start difference. First operand 703 states and 1522 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:28,812 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-02-19 18:28:30,049 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:28:30,223 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-02-19 18:28:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:31,261 INFO L93 Difference]: Finished difference Result 1143 states and 2324 transitions. [2021-02-19 18:28:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-02-19 18:28:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:28:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:31,266 INFO L225 Difference]: With dead ends: 1143 [2021-02-19 18:28:31,266 INFO L226 Difference]: Without dead ends: 1105 [2021-02-19 18:28:31,267 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-02-19 18:28:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-02-19 18:28:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 705. [2021-02-19 18:28:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.1676136363636362) internal successors, (1526), 704 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1526 transitions. [2021-02-19 18:28:31,275 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1526 transitions. Word has length 39 [2021-02-19 18:28:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:31,275 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1526 transitions. [2021-02-19 18:28:31,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1526 transitions. [2021-02-19 18:28:31,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:28:31,275 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:31,276 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:31,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-02-19 18:28:31,476 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:31,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:31,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1785929007, now seen corresponding path program 114 times [2021-02-19 18:28:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:31,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243268575] [2021-02-19 18:28:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:32,221 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 18:28:32,398 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:28:32,563 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:28:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:32,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243268575] [2021-02-19 18:28:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571800093] [2021-02-19 18:28:32,705 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:32,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 18:28:32,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:32,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 18:28:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:35,161 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 18:28:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:35,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:35,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:28:35,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369824753] [2021-02-19 18:28:35,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:28:35,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:35,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:28:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:28:35,352 INFO L87 Difference]: Start difference. First operand 705 states and 1526 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:36,340 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 18:28:38,292 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 18:28:43,306 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-02-19 18:28:44,231 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 18:28:44,901 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 18:28:45,540 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 18:28:46,034 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:28:46,510 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 18:28:47,130 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 18:28:47,670 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 22 [2021-02-19 18:28:48,125 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-02-19 18:28:48,454 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 18:28:48,823 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-02-19 18:28:49,496 WARN L202 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-02-19 18:28:49,977 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 15 [2021-02-19 18:28:50,221 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2021-02-19 18:28:50,717 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 18:28:50,978 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 19 [2021-02-19 18:28:51,330 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 21 [2021-02-19 18:28:51,611 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 18:28:52,015 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 18:28:52,504 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2021-02-19 18:28:52,782 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2021-02-19 18:28:53,120 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 16 [2021-02-19 18:28:53,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:53,503 INFO L93 Difference]: Finished difference Result 1210 states and 2447 transitions. [2021-02-19 18:28:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-02-19 18:28:53,506 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:28:53,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:53,507 INFO L225 Difference]: With dead ends: 1210 [2021-02-19 18:28:53,508 INFO L226 Difference]: Without dead ends: 1165 [2021-02-19 18:28:53,508 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4965 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1875, Invalid=14637, Unknown=0, NotChecked=0, Total=16512 [2021-02-19 18:28:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-02-19 18:28:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 708. [2021-02-19 18:28:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.16973125884017) internal successors, (1534), 707 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1534 transitions. [2021-02-19 18:28:53,515 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1534 transitions. Word has length 39 [2021-02-19 18:28:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:53,515 INFO L480 AbstractCegarLoop]: Abstraction has 708 states and 1534 transitions. [2021-02-19 18:28:53,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:53,515 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1534 transitions. [2021-02-19 18:28:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:28:53,516 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:53,516 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:53,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:53,717 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 521001147, now seen corresponding path program 115 times [2021-02-19 18:28:53,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:53,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453772075] [2021-02-19 18:28:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:54,473 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2021-02-19 18:28:54,688 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-02-19 18:28:54,887 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:28:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453772075] [2021-02-19 18:28:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722434497] [2021-02-19 18:28:55,031 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 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 18:28:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:55,051 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:28:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:56,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:56,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:28:56,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649122168] [2021-02-19 18:28:56,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:28:56,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:28:56,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:28:56,865 INFO L87 Difference]: Start difference. First operand 708 states and 1534 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:57,787 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 16 [2021-02-19 18:28:58,613 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2021-02-19 18:28:59,721 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 14 [2021-02-19 18:29:00,428 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 17 [2021-02-19 18:29:02,088 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2021-02-19 18:29:02,680 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-02-19 18:29:03,021 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2021-02-19 18:29:03,614 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2021-02-19 18:29:04,472 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 19 [2021-02-19 18:29:05,535 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-02-19 18:29:06,365 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2021-02-19 18:29:07,101 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-02-19 18:29:08,392 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2021-02-19 18:29:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:09,348 INFO L93 Difference]: Finished difference Result 1038 states and 2112 transitions. [2021-02-19 18:29:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 18:29:09,352 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:29:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:09,353 INFO L225 Difference]: With dead ends: 1038 [2021-02-19 18:29:09,353 INFO L226 Difference]: Without dead ends: 1018 [2021-02-19 18:29:09,354 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1585, Invalid=10187, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 18:29:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-02-19 18:29:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 709. [2021-02-19 18:29:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 708 states have (on average 2.169491525423729) internal successors, (1536), 708 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1536 transitions. [2021-02-19 18:29:09,361 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1536 transitions. Word has length 39 [2021-02-19 18:29:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:09,361 INFO L480 AbstractCegarLoop]: Abstraction has 709 states and 1536 transitions. [2021-02-19 18:29:09,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1536 transitions. [2021-02-19 18:29:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:29:09,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:09,362 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:09,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:09,563 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:09,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:09,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1760948247, now seen corresponding path program 116 times [2021-02-19 18:29:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:09,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870648553] [2021-02-19 18:29:09,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:10,415 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:29:10,617 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:29:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:10,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870648553] [2021-02-19 18:29:10,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876769255] [2021-02-19 18:29:10,758 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 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 18:29:10,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:29:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:10,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:29:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:12,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:29:12,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778503876] [2021-02-19 18:29:12,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:29:12,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:29:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:29:12,696 INFO L87 Difference]: Start difference. First operand 709 states and 1536 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:17,792 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-02-19 18:29:19,487 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 21 [2021-02-19 18:29:19,727 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-02-19 18:29:20,275 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2021-02-19 18:29:20,529 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-02-19 18:29:20,730 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-02-19 18:29:21,042 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-02-19 18:29:21,201 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-02-19 18:29:21,424 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-02-19 18:29:21,648 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:29:21,847 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-02-19 18:29:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:22,938 INFO L93 Difference]: Finished difference Result 1115 states and 2265 transitions. [2021-02-19 18:29:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:29:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:29:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:22,942 INFO L225 Difference]: With dead ends: 1115 [2021-02-19 18:29:22,942 INFO L226 Difference]: Without dead ends: 1065 [2021-02-19 18:29:22,943 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-02-19 18:29:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-02-19 18:29:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 715. [2021-02-19 18:29:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.168067226890756) internal successors, (1548), 714 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1548 transitions. [2021-02-19 18:29:22,950 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1548 transitions. Word has length 39 [2021-02-19 18:29:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:22,950 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 1548 transitions. [2021-02-19 18:29:22,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1548 transitions. [2021-02-19 18:29:22,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:29:22,951 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:22,951 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:23,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:23,151 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash -730785747, now seen corresponding path program 117 times [2021-02-19 18:29:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:23,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597657657] [2021-02-19 18:29:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:23,989 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:29:24,165 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:29:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597657657] [2021-02-19 18:29:24,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893801296] [2021-02-19 18:29:24,291 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 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 18:29:24,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 18:29:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:24,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 18:29:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:26,681 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-02-19 18:29:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:26,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:26,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-02-19 18:29:26,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122094900] [2021-02-19 18:29:26,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 18:29:26,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:26,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 18:29:26,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:29:26,870 INFO L87 Difference]: Start difference. First operand 715 states and 1548 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:33,116 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2021-02-19 18:29:33,657 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 20 [2021-02-19 18:29:34,308 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-02-19 18:29:34,772 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 18 [2021-02-19 18:29:35,544 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-02-19 18:29:36,425 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 21 [2021-02-19 18:29:36,959 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 18 [2021-02-19 18:29:37,213 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 20 [2021-02-19 18:29:37,522 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 22 [2021-02-19 18:29:38,155 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-02-19 18:29:38,479 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-02-19 18:29:38,740 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 22 [2021-02-19 18:29:38,982 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 18:29:39,263 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 23 [2021-02-19 18:29:39,683 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2021-02-19 18:29:40,072 WARN L202 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-02-19 18:29:40,362 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 18 [2021-02-19 18:29:40,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:40,842 INFO L93 Difference]: Finished difference Result 1120 states and 2289 transitions. [2021-02-19 18:29:40,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 18:29:40,846 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 18:29:40,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:40,848 INFO L225 Difference]: With dead ends: 1120 [2021-02-19 18:29:40,848 INFO L226 Difference]: Without dead ends: 1076 [2021-02-19 18:29:40,848 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3295 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1293, Invalid=10479, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 18:29:40,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-02-19 18:29:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 725. [2021-02-19 18:29:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 2.1767955801104972) internal successors, (1576), 724 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1576 transitions. [2021-02-19 18:29:40,856 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1576 transitions. Word has length 39 [2021-02-19 18:29:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:40,856 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1576 transitions. [2021-02-19 18:29:40,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1576 transitions. [2021-02-19 18:29:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 18:29:40,856 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:40,857 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:41,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:41,057 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:41,057 INFO L82 PathProgramCache]: Analyzing trace with hash 365257073, now seen corresponding path program 118 times [2021-02-19 18:29:41,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:41,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719750701] [2021-02-19 18:29:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:41,950 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 18:29:42,162 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-02-19 18:29:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:42,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719750701] [2021-02-19 18:29:42,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479741804] [2021-02-19 18:29:42,307 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 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 18:29:42,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:29:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:42,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 18:29:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-02-19 18:29:43,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 18:29:43,568 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:29:43,571 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:29:43,572 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:29:43 BasicIcfg [2021-02-19 18:29:43,572 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:29:43,572 INFO L168 Benchmark]: Toolchain (without parser) took 544331.50 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 237.1 MB in the beginning and 287.1 MB in the end (delta: -50.0 MB). Peak memory consumption was 217.2 MB. Max. memory is 16.0 GB. [2021-02-19 18:29:43,572 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:29:43,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.11 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:29:43,572 INFO L168 Benchmark]: Boogie Preprocessor took 12.35 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:29:43,572 INFO L168 Benchmark]: RCFGBuilder took 240.41 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 238.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. [2021-02-19 18:29:43,573 INFO L168 Benchmark]: TraceAbstraction took 544039.27 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 238.0 MB in the beginning and 287.1 MB in the end (delta: -49.2 MB). Peak memory consumption was 217.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:29:43,573 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 0.10 ms. Allocated memory is still 255.9 MB. Free memory was 238.2 MB in the beginning and 238.2 MB in the end (delta: 2.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.11 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.35 ms. Allocated memory is still 255.9 MB. Free memory was 235.1 MB in the beginning and 234.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 240.41 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 238.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 544039.27 ms. Allocated memory was 255.9 MB in the beginning and 522.2 MB in the end (delta: 266.3 MB). Free memory was 238.0 MB in the beginning and 287.1 MB in the end (delta: -49.2 MB). Peak memory consumption was 217.5 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 40 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 30 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 543.9s, OverallIterations: 120, TraceHistogramMax: 6, AutomataDifference: 412.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4635 SDtfs, 25551 SDslu, 60446 SDs, 0 SdLazy, 127599 SolverSat, 7548 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10242 GetRequests, 1853 SyntacticMatches, 138 SemanticMatches, 8251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219517 ImplicationChecksByTransitivity, 376.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=725occurred in iteration=119, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 119 MinimizatonAttempts, 27118 StatesRemovedByMinimization, 119 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 100.5s InterpolantComputationTime, 6818 NumberOfCodeBlocks, 6818 NumberOfCodeBlocksAsserted, 496 NumberOfCheckSat, 6582 ConstructedInterpolants, 0 QuantifiedInterpolants, 2912962 SizeOfPredicates, 570 NumberOfNonLiveVariables, 7371 ConjunctsInSsa, 4177 ConjunctsInUnsatCore, 236 InterpolantComputations, 2 PerfectInterpolantSequences, 710/6759 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