/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/parallel/misc-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:27:08,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:27:08,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:27:08,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:27:08,215 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 [2021-06-05 22:27:08,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:27:08,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:27:08,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:27:08,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:27:08,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:27:08,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:27:08,236 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:27:08,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:27:08,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:27:08,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:27:08,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:27:08,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:27:08,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:27:08,239 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:27:08,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:27:08,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:27:08,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:27:08,541 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:27:08,542 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:27:08,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl [2021-06-05 22:27:08,543 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-5.wvr.bpl' [2021-06-05 22:27:08,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:27:08,579 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:27:08,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:27:08,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:27:08,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:27:08,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:27:08,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:27:08,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:27:08,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:27:08,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/1) ... [2021-06-05 22:27:08,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:27:08,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:27:08,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:27:08,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:27:08,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (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 [2021-06-05 22:27:08,690 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:27:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:27:08,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:27:08,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:27:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:27:08,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:27:08,692 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:27:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:27:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:27:08,693 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:27:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:27:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:27:08,695 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:27:08,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:27:08,939 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:27:08,941 INFO L202 PluginConnector]: Adding new model misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:27:08 BoogieIcfgContainer [2021-06-05 22:27:08,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:27:08,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:27:08,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:27:08,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:27:08,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:27:08" (1/2) ... [2021-06-05 22:27:08,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66995846 and model type misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:27:08, skipping insertion in model container [2021-06-05 22:27:08,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:27:08" (2/2) ... [2021-06-05 22:27:08,947 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-5.wvr.bpl [2021-06-05 22:27:08,952 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:27:08,952 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:27:08,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:27:08,953 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:27:08,982 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:27:09,007 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:27:09,023 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:27:09,023 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:27:09,023 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:27:09,023 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:27:09,023 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:27:09,024 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:27:09,024 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:27:09,024 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:27:09,031 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 23 transitions, 70 flow [2021-06-05 22:27:09,046 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:27:09,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,055 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:09,056 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1648741274, now seen corresponding path program 1 times [2021-06-05 22:27:09,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41571714] [2021-06-05 22:27:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41571714] [2021-06-05 22:27:09,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41571714] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:27:09,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:27:09,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:27:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640987442] [2021-06-05 22:27:09,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:27:09,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:27:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:27:09,232 INFO L87 Difference]: Start difference. First operand has 89 states, 87 states have (on average 2.6091954022988504) internal successors, (227), 88 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,275 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2021-06-05 22:27:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:27:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:27:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,287 INFO L225 Difference]: With dead ends: 84 [2021-06-05 22:27:09,287 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 22:27:09,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:27:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 22:27:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-06-05 22:27:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 55 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 117 transitions. [2021-06-05 22:27:09,316 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 117 transitions. Word has length 14 [2021-06-05 22:27:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,317 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 117 transitions. [2021-06-05 22:27:09,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 117 transitions. [2021-06-05 22:27:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 22:27:09,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,318 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:09,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:27:09,318 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,319 INFO L82 PathProgramCache]: Analyzing trace with hash -482229000, now seen corresponding path program 2 times [2021-06-05 22:27:09,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436479550] [2021-06-05 22:27:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436479550] [2021-06-05 22:27:09,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436479550] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:27:09,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:27:09,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:27:09,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221822327] [2021-06-05 22:27:09,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:27:09,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:27:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:27:09,356 INFO L87 Difference]: Start difference. First operand 56 states and 117 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,401 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2021-06-05 22:27:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:27:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 22:27:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,403 INFO L225 Difference]: With dead ends: 80 [2021-06-05 22:27:09,404 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 22:27:09,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:27:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 22:27:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-06-05 22:27:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 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) [2021-06-05 22:27:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-06-05 22:27:09,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 14 [2021-06-05 22:27:09,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,414 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-06-05 22:27:09,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-06-05 22:27:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:27:09,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,415 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:09,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:27:09,416 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747962, now seen corresponding path program 1 times [2021-06-05 22:27:09,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128567286] [2021-06-05 22:27:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128567286] [2021-06-05 22:27:09,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128567286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099029133] [2021-06-05 22:27:09,465 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 [2021-06-05 22:27:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:27:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099029133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:09,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:09,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 22:27:09,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415456627] [2021-06-05 22:27:09,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:27:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:27:09,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:09,607 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,652 INFO L93 Difference]: Finished difference Result 90 states and 188 transitions. [2021-06-05 22:27:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:27:09,653 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:27:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,654 INFO L225 Difference]: With dead ends: 90 [2021-06-05 22:27:09,654 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 22:27:09,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:09,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 22:27:09,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-06-05 22:27:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-06-05 22:27:09,663 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-06-05 22:27:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:09,664 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-06-05 22:27:09,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-06-05 22:27:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:27:09,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:09,665 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:09,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 22:27:09,881 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -255759302, now seen corresponding path program 1 times [2021-06-05 22:27:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:09,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352059390] [2021-06-05 22:27:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:09,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:09,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352059390] [2021-06-05 22:27:09,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352059390] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:27:09,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:27:09,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:27:09,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945227518] [2021-06-05 22:27:09,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:27:09,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:27:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:27:09,948 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:09,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:09,990 INFO L93 Difference]: Finished difference Result 98 states and 208 transitions. [2021-06-05 22:27:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:27:09,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:27:09,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:09,992 INFO L225 Difference]: With dead ends: 98 [2021-06-05 22:27:09,992 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 22:27:09,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:27:09,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 22:27:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-06-05 22:27:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2) internal successors, (165), 75 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 165 transitions. [2021-06-05 22:27:10,027 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 165 transitions. Word has length 16 [2021-06-05 22:27:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:10,027 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 165 transitions. [2021-06-05 22:27:10,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 165 transitions. [2021-06-05 22:27:10,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:27:10,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:10,028 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:10,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:27:10,029 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:10,029 INFO L82 PathProgramCache]: Analyzing trace with hash -384325124, now seen corresponding path program 2 times [2021-06-05 22:27:10,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664068944] [2021-06-05 22:27:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:10,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664068944] [2021-06-05 22:27:10,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664068944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86810358] [2021-06-05 22:27:10,114 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 [2021-06-05 22:27:10,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:10,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 22:27:10,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86810358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:10,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 22:27:10,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896119377] [2021-06-05 22:27:10,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:10,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:10,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:10,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:10,322 INFO L87 Difference]: Start difference. First operand 76 states and 165 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:10,380 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 22:27:10,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:27:10,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:27:10,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:10,381 INFO L225 Difference]: With dead ends: 108 [2021-06-05 22:27:10,381 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 22:27:10,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:27:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 22:27:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-06-05 22:27:10,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.223529411764706) internal successors, (189), 85 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 189 transitions. [2021-06-05 22:27:10,387 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 189 transitions. Word has length 18 [2021-06-05 22:27:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:10,388 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 189 transitions. [2021-06-05 22:27:10,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 189 transitions. [2021-06-05 22:27:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 22:27:10,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:10,389 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:10,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:10,605 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:10,605 INFO L82 PathProgramCache]: Analyzing trace with hash -196634824, now seen corresponding path program 1 times [2021-06-05 22:27:10,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:10,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247603504] [2021-06-05 22:27:10,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:10,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247603504] [2021-06-05 22:27:10,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247603504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866145489] [2021-06-05 22:27:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:27:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:10,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:27:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:10,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866145489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:10,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:10,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 22:27:10,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737214481] [2021-06-05 22:27:10,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:27:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:27:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:27:10,821 INFO L87 Difference]: Start difference. First operand 86 states and 189 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:10,959 INFO L93 Difference]: Finished difference Result 156 states and 344 transitions. [2021-06-05 22:27:10,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:27:10,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 22:27:10,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:10,960 INFO L225 Difference]: With dead ends: 156 [2021-06-05 22:27:10,961 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 22:27:10,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:27:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 22:27:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-06-05 22:27:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.299145299145299) internal successors, (269), 117 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 269 transitions. [2021-06-05 22:27:10,980 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 269 transitions. Word has length 18 [2021-06-05 22:27:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:10,981 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 269 transitions. [2021-06-05 22:27:10,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 269 transitions. [2021-06-05 22:27:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:10,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:10,982 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:11,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,202 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:11,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1717092286, now seen corresponding path program 3 times [2021-06-05 22:27:11,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:11,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125713732] [2021-06-05 22:27:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125713732] [2021-06-05 22:27:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125713732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541425493] [2021-06-05 22:27:11,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:11,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:11,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:27:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541425493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:11,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:27:11,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60935976] [2021-06-05 22:27:11,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:11,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:11,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:11,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:11,472 INFO L87 Difference]: Start difference. First operand 118 states and 269 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:11,574 INFO L93 Difference]: Finished difference Result 142 states and 316 transitions. [2021-06-05 22:27:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:27:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:11,576 INFO L225 Difference]: With dead ends: 142 [2021-06-05 22:27:11,576 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 22:27:11,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 22:27:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2021-06-05 22:27:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-06-05 22:27:11,583 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-06-05 22:27:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:11,583 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-06-05 22:27:11,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-06-05 22:27:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:11,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:11,584 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:11,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:11,797 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:11,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1886534454, now seen corresponding path program 2 times [2021-06-05 22:27:11,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:11,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59925167] [2021-06-05 22:27:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:11,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59925167] [2021-06-05 22:27:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59925167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226823872] [2021-06-05 22:27:11,852 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 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 [2021-06-05 22:27:11,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:11,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:27:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226823872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:11,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:11,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:27:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827338757] [2021-06-05 22:27:11,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:11,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:11,983 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:12,101 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-06-05 22:27:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:27:12,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 22:27:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:12,103 INFO L225 Difference]: With dead ends: 150 [2021-06-05 22:27:12,103 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 22:27:12,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:27:12,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 22:27:12,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-06-05 22:27:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.3070866141732282) internal successors, (293), 127 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 293 transitions. [2021-06-05 22:27:12,122 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 293 transitions. Word has length 20 [2021-06-05 22:27:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:12,122 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 293 transitions. [2021-06-05 22:27:12,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 293 transitions. [2021-06-05 22:27:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 22:27:12,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:12,124 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:12,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 22:27:12,350 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:12,350 INFO L82 PathProgramCache]: Analyzing trace with hash 132809022, now seen corresponding path program 2 times [2021-06-05 22:27:12,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:12,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192002807] [2021-06-05 22:27:12,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:12,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192002807] [2021-06-05 22:27:12,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192002807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013168727] [2021-06-05 22:27:12,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:12,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:12,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 22:27:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013168727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:12,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 22:27:12,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511337198] [2021-06-05 22:27:12,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:27:12,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:12,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:27:12,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:27:12,590 INFO L87 Difference]: Start difference. First operand 128 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-06-05 22:27:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:12,682 INFO L93 Difference]: Finished difference Result 150 states and 336 transitions. [2021-06-05 22:27:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:27:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 20 [2021-06-05 22:27:12,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:12,688 INFO L225 Difference]: With dead ends: 150 [2021-06-05 22:27:12,688 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 22:27:12,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:12,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 22:27:12,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-06-05 22:27:12,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2941176470588234) internal successors, (273), 119 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 273 transitions. [2021-06-05 22:27:12,693 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 273 transitions. Word has length 20 [2021-06-05 22:27:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:12,693 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 273 transitions. [2021-06-05 22:27:12,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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) [2021-06-05 22:27:12,693 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 273 transitions. [2021-06-05 22:27:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:27:12,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:12,694 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:12,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:27:12,901 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1750373120, now seen corresponding path program 4 times [2021-06-05 22:27:12,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:12,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240216611] [2021-06-05 22:27:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:12,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240216611] [2021-06-05 22:27:12,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240216611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:12,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524223863] [2021-06-05 22:27:12,964 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 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 [2021-06-05 22:27:13,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:13,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:27:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:13,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524223863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:13,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:27:13,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034559050] [2021-06-05 22:27:13,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:27:13,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:27:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:13,160 INFO L87 Difference]: Start difference. First operand 120 states and 273 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-05 22:27:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:13,359 INFO L93 Difference]: Finished difference Result 212 states and 476 transitions. [2021-06-05 22:27:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:13,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 22:27:13,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:13,360 INFO L225 Difference]: With dead ends: 212 [2021-06-05 22:27:13,360 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 22:27:13,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 22:27:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2021-06-05 22:27:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3049645390070923) internal successors, (325), 141 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:13,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 325 transitions. [2021-06-05 22:27:13,365 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 325 transitions. Word has length 22 [2021-06-05 22:27:13,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:13,365 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 325 transitions. [2021-06-05 22:27:13,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-05 22:27:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 325 transitions. [2021-06-05 22:27:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:27:13,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:13,366 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:13,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:13,588 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1768621252, now seen corresponding path program 3 times [2021-06-05 22:27:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:13,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749263269] [2021-06-05 22:27:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:13,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:13,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:13,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749263269] [2021-06-05 22:27:13,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749263269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175556458] [2021-06-05 22:27:13,655 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 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 [2021-06-05 22:27:13,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 22:27:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:13,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175556458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:13,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:13,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:27:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936097794] [2021-06-05 22:27:13,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:27:13,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:27:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:13,849 INFO L87 Difference]: Start difference. First operand 142 states and 325 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-05 22:27:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:14,158 INFO L93 Difference]: Finished difference Result 368 states and 820 transitions. [2021-06-05 22:27:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 22:27:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:14,160 INFO L225 Difference]: With dead ends: 368 [2021-06-05 22:27:14,160 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:27:14,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:27:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:27:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 214. [2021-06-05 22:27:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-06-05 22:27:14,171 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 22 [2021-06-05 22:27:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:14,171 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-06-05 22:27:14,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-06-05 22:27:14,171 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-06-05 22:27:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:27:14,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:14,173 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:14,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:27:14,389 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1909707008, now seen corresponding path program 3 times [2021-06-05 22:27:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:14,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371431816] [2021-06-05 22:27:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:14,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371431816] [2021-06-05 22:27:14,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371431816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302331125] [2021-06-05 22:27:14,449 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 [2021-06-05 22:27:14,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:14,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:14,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 22:27:14,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:14,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302331125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:14,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:14,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:27:14,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725437903] [2021-06-05 22:27:14,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:27:14,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:14,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:27:14,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:27:14,624 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:14,844 INFO L93 Difference]: Finished difference Result 284 states and 664 transitions. [2021-06-05 22:27:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:14,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:27:14,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:14,846 INFO L225 Difference]: With dead ends: 284 [2021-06-05 22:27:14,846 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 22:27:14,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 22:27:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 230. [2021-06-05 22:27:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-06-05 22:27:14,854 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 22 [2021-06-05 22:27:14,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:14,854 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-06-05 22:27:14,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-06-05 22:27:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:14,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:14,856 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:15,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:15,073 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash 828453442, now seen corresponding path program 4 times [2021-06-05 22:27:15,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:15,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600811763] [2021-06-05 22:27:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:15,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600811763] [2021-06-05 22:27:15,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600811763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566110863] [2021-06-05 22:27:15,169 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 [2021-06-05 22:27:15,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:15,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:15,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:15,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566110863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:15,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:15,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:15,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027625188] [2021-06-05 22:27:15,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:15,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:15,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:15,366 INFO L87 Difference]: Start difference. First operand 230 states and 549 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:15,626 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-06-05 22:27:15,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:15,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:15,628 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:27:15,628 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 22:27:15,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 22:27:15,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 246. [2021-06-05 22:27:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-06-05 22:27:15,634 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-06-05 22:27:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:15,635 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-06-05 22:27:15,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-06-05 22:27:15,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:15,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:15,636 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:15,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:27:15,859 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:15,859 INFO L82 PathProgramCache]: Analyzing trace with hash -902316290, now seen corresponding path program 5 times [2021-06-05 22:27:15,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:15,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004450762] [2021-06-05 22:27:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:15,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004450762] [2021-06-05 22:27:15,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004450762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:15,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724574823] [2021-06-05 22:27:15,967 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 [2021-06-05 22:27:16,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724574823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:16,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:16,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549600057] [2021-06-05 22:27:16,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:16,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:16,179 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:16,457 INFO L93 Difference]: Finished difference Result 324 states and 768 transitions. [2021-06-05 22:27:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:16,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:16,459 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:27:16,459 INFO L226 Difference]: Without dead ends: 302 [2021-06-05 22:27:16,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:27:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-05 22:27:16,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 246. [2021-06-05 22:27:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.404081632653061) internal successors, (589), 245 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 589 transitions. [2021-06-05 22:27:16,466 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 589 transitions. Word has length 24 [2021-06-05 22:27:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:16,466 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 589 transitions. [2021-06-05 22:27:16,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 589 transitions. [2021-06-05 22:27:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:16,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:16,467 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:16,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 22:27:16,681 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1108254722, now seen corresponding path program 6 times [2021-06-05 22:27:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270448928] [2021-06-05 22:27:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270448928] [2021-06-05 22:27:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270448928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772546410] [2021-06-05 22:27:16,749 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 [2021-06-05 22:27:16,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:27:16,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:16,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772546410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:16,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:16,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530532735] [2021-06-05 22:27:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:16,964 INFO L87 Difference]: Start difference. First operand 246 states and 589 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:17,229 INFO L93 Difference]: Finished difference Result 356 states and 840 transitions. [2021-06-05 22:27:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:17,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:17,230 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:27:17,231 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:27:17,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:27:17,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 278. [2021-06-05 22:27:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 22:27:17,238 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-06-05 22:27:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:17,238 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 22:27:17,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 22:27:17,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:17,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:17,239 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:17,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:17,453 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash -920564422, now seen corresponding path program 7 times [2021-06-05 22:27:17,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:17,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718836899] [2021-06-05 22:27:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:17,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:17,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718836899] [2021-06-05 22:27:17,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718836899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:17,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493383499] [2021-06-05 22:27:17,529 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 [2021-06-05 22:27:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:17,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:17,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:17,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493383499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:17,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:17,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:17,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362593723] [2021-06-05 22:27:17,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:17,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:17,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:17,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:17,777 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:18,033 INFO L93 Difference]: Finished difference Result 308 states and 732 transitions. [2021-06-05 22:27:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:18,035 INFO L225 Difference]: With dead ends: 308 [2021-06-05 22:27:18,035 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 22:27:18,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 22:27:18,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 278. [2021-06-05 22:27:18,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-05 22:27:18,042 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 24 [2021-06-05 22:27:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:18,042 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-05 22:27:18,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-05 22:27:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:18,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:18,043 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:18,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:27:18,257 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1620677442, now seen corresponding path program 8 times [2021-06-05 22:27:18,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:18,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050967884] [2021-06-05 22:27:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:18,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:18,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050967884] [2021-06-05 22:27:18,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050967884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:18,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025737135] [2021-06-05 22:27:18,321 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 [2021-06-05 22:27:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:18,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:18,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:18,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025737135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:18,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:18,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550892625] [2021-06-05 22:27:18,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:18,578 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:18,862 INFO L93 Difference]: Finished difference Result 348 states and 828 transitions. [2021-06-05 22:27:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:18,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:18,863 INFO L225 Difference]: With dead ends: 348 [2021-06-05 22:27:18,863 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:27:18,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:18,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:27:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 294. [2021-06-05 22:27:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-06-05 22:27:18,870 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-06-05 22:27:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:18,870 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-06-05 22:27:18,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-06-05 22:27:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:18,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:18,871 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:19,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:19,093 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1277150090, now seen corresponding path program 9 times [2021-06-05 22:27:19,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:19,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706512874] [2021-06-05 22:27:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:19,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706512874] [2021-06-05 22:27:19,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706512874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862305621] [2021-06-05 22:27:19,163 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 [2021-06-05 22:27:19,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:19,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:19,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:19,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862305621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:19,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:19,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373555353] [2021-06-05 22:27:19,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:19,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:19,337 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:19,473 INFO L93 Difference]: Finished difference Result 324 states and 772 transitions. [2021-06-05 22:27:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:27:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:19,474 INFO L225 Difference]: With dead ends: 324 [2021-06-05 22:27:19,474 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 22:27:19,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 22:27:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-06-05 22:27:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 22:27:19,481 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 22:27:19,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:19,481 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 22:27:19,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 22:27:19,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:19,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:19,482 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:19,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:19,682 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash 16240442, now seen corresponding path program 10 times [2021-06-05 22:27:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357563934] [2021-06-05 22:27:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:19,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357563934] [2021-06-05 22:27:19,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357563934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630798985] [2021-06-05 22:27:19,760 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 [2021-06-05 22:27:19,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:19,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:19,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630798985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:19,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:19,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:19,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249526942] [2021-06-05 22:27:19,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:19,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:19,963 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:20,152 INFO L93 Difference]: Finished difference Result 340 states and 812 transitions. [2021-06-05 22:27:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:27:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:20,154 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:27:20,154 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 22:27:20,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:27:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 22:27:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 286. [2021-06-05 22:27:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 22:27:20,161 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 22:27:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:20,161 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 22:27:20,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 22:27:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:20,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:20,162 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:20,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:20,375 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1448836354, now seen corresponding path program 11 times [2021-06-05 22:27:20,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:20,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432210486] [2021-06-05 22:27:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:20,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:20,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432210486] [2021-06-05 22:27:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432210486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405721749] [2021-06-05 22:27:20,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:27:20,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:20,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405721749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:20,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:20,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562553603] [2021-06-05 22:27:20,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:20,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:20,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:20,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:20,640 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:20,931 INFO L93 Difference]: Finished difference Result 356 states and 848 transitions. [2021-06-05 22:27:20,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:20,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:20,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:20,933 INFO L225 Difference]: With dead ends: 356 [2021-06-05 22:27:20,933 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 22:27:20,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:27:20,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 22:27:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 294. [2021-06-05 22:27:20,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.419795221843003) internal successors, (709), 293 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 709 transitions. [2021-06-05 22:27:20,940 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 709 transitions. Word has length 24 [2021-06-05 22:27:20,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:20,940 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 709 transitions. [2021-06-05 22:27:20,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:20,940 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 709 transitions. [2021-06-05 22:27:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:20,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:20,941 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:21,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:27:21,156 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:21,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:21,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2007690, now seen corresponding path program 12 times [2021-06-05 22:27:21,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:21,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134374852] [2021-06-05 22:27:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:21,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:21,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134374852] [2021-06-05 22:27:21,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134374852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820639923] [2021-06-05 22:27:21,228 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 [2021-06-05 22:27:21,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:21,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:21,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:21,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820639923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:21,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:21,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461672333] [2021-06-05 22:27:21,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:21,397 INFO L87 Difference]: Start difference. First operand 294 states and 709 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:21,626 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-06-05 22:27:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:21,628 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:27:21,628 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:27:21,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:27:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 286. [2021-06-05 22:27:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 22:27:21,634 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 22:27:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:21,634 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 22:27:21,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 22:27:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:21,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:21,635 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:21,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 22:27:21,836 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1390424506, now seen corresponding path program 13 times [2021-06-05 22:27:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972428152] [2021-06-05 22:27:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:21,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:21,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972428152] [2021-06-05 22:27:21,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972428152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:21,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630402605] [2021-06-05 22:27:21,911 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 [2021-06-05 22:27:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630402605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:22,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:22,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782740619] [2021-06-05 22:27:22,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:22,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:22,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:22,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:22,126 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:22,373 INFO L93 Difference]: Finished difference Result 332 states and 788 transitions. [2021-06-05 22:27:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:22,374 INFO L225 Difference]: With dead ends: 332 [2021-06-05 22:27:22,374 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 22:27:22,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 22:27:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 286. [2021-06-05 22:27:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.4175438596491228) internal successors, (689), 285 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 689 transitions. [2021-06-05 22:27:22,380 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 689 transitions. Word has length 24 [2021-06-05 22:27:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:22,381 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 689 transitions. [2021-06-05 22:27:22,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 689 transitions. [2021-06-05 22:27:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:22,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:22,382 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:22,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:27:22,609 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:22,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash -340345226, now seen corresponding path program 14 times [2021-06-05 22:27:22,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:22,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286997431] [2021-06-05 22:27:22,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286997431] [2021-06-05 22:27:22,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286997431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416107431] [2021-06-05 22:27:22,677 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 [2021-06-05 22:27:22,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:22,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:22,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416107431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:22,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:22,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417783450] [2021-06-05 22:27:22,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:22,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:22,871 INFO L87 Difference]: Start difference. First operand 286 states and 689 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:23,030 INFO L93 Difference]: Finished difference Result 308 states and 728 transitions. [2021-06-05 22:27:23,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:27:23,031 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:23,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:23,032 INFO L225 Difference]: With dead ends: 308 [2021-06-05 22:27:23,032 INFO L226 Difference]: Without dead ends: 294 [2021-06-05 22:27:23,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-05 22:27:23,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 262. [2021-06-05 22:27:23,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-06-05 22:27:23,037 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-06-05 22:27:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-06-05 22:27:23,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-06-05 22:27:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:23,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:23,038 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:23,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 22:27:23,253 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash -546283658, now seen corresponding path program 15 times [2021-06-05 22:27:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965852466] [2021-06-05 22:27:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:23,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965852466] [2021-06-05 22:27:23,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965852466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663327363] [2021-06-05 22:27:23,316 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 [2021-06-05 22:27:23,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:23,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663327363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:23,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:23,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11811427] [2021-06-05 22:27:23,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:23,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:23,507 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:23,679 INFO L93 Difference]: Finished difference Result 300 states and 708 transitions. [2021-06-05 22:27:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 22:27:23,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:23,681 INFO L225 Difference]: With dead ends: 300 [2021-06-05 22:27:23,681 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 22:27:23,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:27:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 22:27:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2021-06-05 22:27:23,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.3946360153256707) internal successors, (625), 261 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 625 transitions. [2021-06-05 22:27:23,686 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 625 transitions. Word has length 24 [2021-06-05 22:27:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:23,686 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 625 transitions. [2021-06-05 22:27:23,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 625 transitions. [2021-06-05 22:27:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:27:23,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:23,688 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:23,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:23,909 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash -358593358, now seen corresponding path program 16 times [2021-06-05 22:27:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:23,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652117001] [2021-06-05 22:27:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:23,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652117001] [2021-06-05 22:27:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652117001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:23,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669320270] [2021-06-05 22:27:23,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 22:27:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:24,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669320270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:24,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:24,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 22:27:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469714515] [2021-06-05 22:27:24,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:27:24,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:24,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:27:24,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:27:24,135 INFO L87 Difference]: Start difference. First operand 262 states and 625 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:24,358 INFO L93 Difference]: Finished difference Result 340 states and 804 transitions. [2021-06-05 22:27:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:27:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:24,360 INFO L225 Difference]: With dead ends: 340 [2021-06-05 22:27:24,360 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 22:27:24,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:27:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 22:27:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 270. [2021-06-05 22:27:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.3977695167286246) internal successors, (645), 269 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) [2021-06-05 22:27:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 645 transitions. [2021-06-05 22:27:24,366 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 645 transitions. Word has length 24 [2021-06-05 22:27:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:24,366 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 645 transitions. [2021-06-05 22:27:24,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 645 transitions. [2021-06-05 22:27:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:24,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:24,372 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:24,589 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:24,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1945240768, now seen corresponding path program 17 times [2021-06-05 22:27:24,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:24,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520674287] [2021-06-05 22:27:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:24,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520674287] [2021-06-05 22:27:24,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520674287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:24,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455653812] [2021-06-05 22:27:24,669 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 [2021-06-05 22:27:24,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:27:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:24,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455653812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:24,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:24,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:24,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334165168] [2021-06-05 22:27:24,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:24,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:24,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:24,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:24,911 INFO L87 Difference]: Start difference. First operand 270 states and 645 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:25,199 INFO L93 Difference]: Finished difference Result 388 states and 920 transitions. [2021-06-05 22:27:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:25,200 INFO L225 Difference]: With dead ends: 388 [2021-06-05 22:27:25,200 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 22:27:25,201 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 22:27:25,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 278. [2021-06-05 22:27:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4007220216606497) internal successors, (665), 277 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) [2021-06-05 22:27:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 665 transitions. [2021-06-05 22:27:25,206 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 665 transitions. Word has length 26 [2021-06-05 22:27:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:25,206 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 665 transitions. [2021-06-05 22:27:25,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 665 transitions. [2021-06-05 22:27:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:25,207 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:25,207 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:25,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 22:27:25,421 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1787202428, now seen corresponding path program 18 times [2021-06-05 22:27:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:25,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451061229] [2021-06-05 22:27:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:25,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451061229] [2021-06-05 22:27:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451061229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:25,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196133292] [2021-06-05 22:27:25,499 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 [2021-06-05 22:27:25,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:27:25,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:25,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196133292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:25,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:25,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:25,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911925568] [2021-06-05 22:27:25,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:25,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:25,765 INFO L87 Difference]: Start difference. First operand 278 states and 665 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:26,131 INFO L93 Difference]: Finished difference Result 452 states and 1076 transitions. [2021-06-05 22:27:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:26,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:26,133 INFO L225 Difference]: With dead ends: 452 [2021-06-05 22:27:26,133 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 22:27:26,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 443.7ms TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 22:27:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2021-06-05 22:27:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.411003236245955) internal successors, (745), 309 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 745 transitions. [2021-06-05 22:27:26,139 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 745 transitions. Word has length 26 [2021-06-05 22:27:26,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:26,139 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 745 transitions. [2021-06-05 22:27:26,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:26,139 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 745 transitions. [2021-06-05 22:27:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:26,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:26,140 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:26,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:26,362 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1974892728, now seen corresponding path program 19 times [2021-06-05 22:27:26,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:26,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682666329] [2021-06-05 22:27:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:26,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:26,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682666329] [2021-06-05 22:27:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682666329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:26,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447504551] [2021-06-05 22:27:26,453 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 [2021-06-05 22:27:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:26,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:26,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447504551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:26,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:26,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:26,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713725101] [2021-06-05 22:27:26,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:26,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:26,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:26,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:26,723 INFO L87 Difference]: Start difference. First operand 310 states and 745 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:27,039 INFO L93 Difference]: Finished difference Result 536 states and 1240 transitions. [2021-06-05 22:27:27,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:27,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:27,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:27,041 INFO L225 Difference]: With dead ends: 536 [2021-06-05 22:27:27,041 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 22:27:27,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 22:27:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 342. [2021-06-05 22:27:27,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.43108504398827) internal successors, (829), 341 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 829 transitions. [2021-06-05 22:27:27,050 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 829 transitions. Word has length 26 [2021-06-05 22:27:27,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:27,051 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 829 transitions. [2021-06-05 22:27:27,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,051 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 829 transitions. [2021-06-05 22:27:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:27,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:27,052 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:27,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 22:27:27,265 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1803206464, now seen corresponding path program 20 times [2021-06-05 22:27:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:27,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895090409] [2021-06-05 22:27:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:27,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895090409] [2021-06-05 22:27:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895090409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35573758] [2021-06-05 22:27:27,330 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:27,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:27,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35573758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:27,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:27,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:27,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732432651] [2021-06-05 22:27:27,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:27,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:27,537 INFO L87 Difference]: Start difference. First operand 342 states and 829 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:27,765 INFO L93 Difference]: Finished difference Result 460 states and 1104 transitions. [2021-06-05 22:27:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:27,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:27,766 INFO L225 Difference]: With dead ends: 460 [2021-06-05 22:27:27,766 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 22:27:27,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 22:27:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 350. [2021-06-05 22:27:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.432664756446991) internal successors, (849), 349 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 849 transitions. [2021-06-05 22:27:27,773 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 849 transitions. Word has length 26 [2021-06-05 22:27:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:27,773 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 849 transitions. [2021-06-05 22:27:27,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 849 transitions. [2021-06-05 22:27:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:27,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:27,774 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:27,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 22:27:27,989 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1232622468, now seen corresponding path program 21 times [2021-06-05 22:27:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:27,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56076649] [2021-06-05 22:27:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:28,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:28,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56076649] [2021-06-05 22:27:28,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56076649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:28,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922879172] [2021-06-05 22:27:28,055 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 [2021-06-05 22:27:28,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:28,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:28,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922879172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:28,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:28,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272305309] [2021-06-05 22:27:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:28,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:28,304 INFO L87 Difference]: Start difference. First operand 350 states and 849 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:28,573 INFO L93 Difference]: Finished difference Result 492 states and 1180 transitions. [2021-06-05 22:27:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:28,575 INFO L225 Difference]: With dead ends: 492 [2021-06-05 22:27:28,575 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 22:27:28,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 22:27:28,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 358. [2021-06-05 22:27:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.434173669467787) internal successors, (869), 357 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 869 transitions. [2021-06-05 22:27:28,582 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 869 transitions. Word has length 26 [2021-06-05 22:27:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:28,582 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 869 transitions. [2021-06-05 22:27:28,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 869 transitions. [2021-06-05 22:27:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:28,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:28,583 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:28,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 22:27:28,804 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1044932168, now seen corresponding path program 22 times [2021-06-05 22:27:28,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:28,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127182070] [2021-06-05 22:27:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:28,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127182070] [2021-06-05 22:27:28,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127182070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:28,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809263704] [2021-06-05 22:27:28,871 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 [2021-06-05 22:27:28,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809263704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:29,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:29,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033400622] [2021-06-05 22:27:29,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:29,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:29,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:29,138 INFO L87 Difference]: Start difference. First operand 358 states and 869 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:29,427 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-06-05 22:27:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:29,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:29,428 INFO L225 Difference]: With dead ends: 548 [2021-06-05 22:27:29,428 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 22:27:29,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:27:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 22:27:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 390. [2021-06-05 22:27:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.4395886889460154) internal successors, (949), 389 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 949 transitions. [2021-06-05 22:27:29,435 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 949 transitions. Word has length 26 [2021-06-05 22:27:29,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:29,435 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 949 transitions. [2021-06-05 22:27:29,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 949 transitions. [2021-06-05 22:27:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:29,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:29,436 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:29,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 22:27:29,653 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:29,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1570960004, now seen corresponding path program 23 times [2021-06-05 22:27:29,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:29,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143583075] [2021-06-05 22:27:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:29,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143583075] [2021-06-05 22:27:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143583075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056986861] [2021-06-05 22:27:29,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:29,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:29,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:29,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:29,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056986861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:29,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:29,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:29,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460218403] [2021-06-05 22:27:29,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:29,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:29,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:29,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:29,961 INFO L87 Difference]: Start difference. First operand 390 states and 949 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:30,381 INFO L93 Difference]: Finished difference Result 556 states and 1340 transitions. [2021-06-05 22:27:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:30,383 INFO L225 Difference]: With dead ends: 556 [2021-06-05 22:27:30,383 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 22:27:30,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 22:27:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-06-05 22:27:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-06-05 22:27:30,390 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-06-05 22:27:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:30,390 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-06-05 22:27:30,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-06-05 22:27:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:30,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:30,391 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:30,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 22:27:30,605 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1383269704, now seen corresponding path program 24 times [2021-06-05 22:27:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:30,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542989713] [2021-06-05 22:27:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:30,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:30,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542989713] [2021-06-05 22:27:30,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542989713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:30,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803579835] [2021-06-05 22:27:30,691 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 [2021-06-05 22:27:30,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:27:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803579835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:30,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:30,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234212399] [2021-06-05 22:27:30,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:30,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:30,932 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:31,169 INFO L93 Difference]: Finished difference Result 548 states and 1324 transitions. [2021-06-05 22:27:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:27:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:31,170 INFO L225 Difference]: With dead ends: 548 [2021-06-05 22:27:31,170 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 22:27:31,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 331.9ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:27:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 22:27:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 398. [2021-06-05 22:27:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.44080604534005) internal successors, (969), 397 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 969 transitions. [2021-06-05 22:27:31,177 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 969 transitions. Word has length 26 [2021-06-05 22:27:31,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:31,177 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 969 transitions. [2021-06-05 22:27:31,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 969 transitions. [2021-06-05 22:27:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:31,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:31,178 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:31,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:31,401 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:31,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:31,402 INFO L82 PathProgramCache]: Analyzing trace with hash 319483004, now seen corresponding path program 25 times [2021-06-05 22:27:31,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:31,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334704633] [2021-06-05 22:27:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:31,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:31,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334704633] [2021-06-05 22:27:31,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334704633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257977993] [2021-06-05 22:27:31,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:27:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:31,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:31,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257977993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:31,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:31,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:31,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001088305] [2021-06-05 22:27:31,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:31,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:31,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:31,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:31,727 INFO L87 Difference]: Start difference. First operand 398 states and 969 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:31,967 INFO L93 Difference]: Finished difference Result 508 states and 1224 transitions. [2021-06-05 22:27:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:31,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:31,969 INFO L225 Difference]: With dead ends: 508 [2021-06-05 22:27:31,969 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 22:27:31,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 22:27:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2021-06-05 22:27:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.4419753086419753) internal successors, (989), 405 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 989 transitions. [2021-06-05 22:27:31,975 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 989 transitions. Word has length 26 [2021-06-05 22:27:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:31,976 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 989 transitions. [2021-06-05 22:27:31,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 989 transitions. [2021-06-05 22:27:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:31,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:31,977 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:32,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:27:32,193 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash 113544572, now seen corresponding path program 26 times [2021-06-05 22:27:32,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:32,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737537040] [2021-06-05 22:27:32,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:32,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:32,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737537040] [2021-06-05 22:27:32,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737537040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:32,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252918393] [2021-06-05 22:27:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:32,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:32,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:32,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:32,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252918393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:32,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:32,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:32,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737287215] [2021-06-05 22:27:32,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:32,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:32,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:32,499 INFO L87 Difference]: Start difference. First operand 406 states and 989 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:32,812 INFO L93 Difference]: Finished difference Result 548 states and 1320 transitions. [2021-06-05 22:27:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:32,814 INFO L225 Difference]: With dead ends: 548 [2021-06-05 22:27:32,814 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 22:27:32,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 22:27:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 422. [2021-06-05 22:27:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.4441805225653206) internal successors, (1029), 421 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) [2021-06-05 22:27:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1029 transitions. [2021-06-05 22:27:32,820 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1029 transitions. Word has length 26 [2021-06-05 22:27:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:32,820 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1029 transitions. [2021-06-05 22:27:32,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1029 transitions. [2021-06-05 22:27:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:32,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:32,821 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:33,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 22:27:33,029 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -224792964, now seen corresponding path program 27 times [2021-06-05 22:27:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491096465] [2021-06-05 22:27:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:33,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:33,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491096465] [2021-06-05 22:27:33,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491096465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:33,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670577967] [2021-06-05 22:27:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:33,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:27:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:33,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670577967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:33,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:33,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:33,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116750671] [2021-06-05 22:27:33,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:33,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:33,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:33,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:33,318 INFO L87 Difference]: Start difference. First operand 422 states and 1029 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:33,762 INFO L93 Difference]: Finished difference Result 588 states and 1420 transitions. [2021-06-05 22:27:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:33,764 INFO L225 Difference]: With dead ends: 588 [2021-06-05 22:27:33,764 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 22:27:33,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:27:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 22:27:33,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 438. [2021-06-05 22:27:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.446224256292906) internal successors, (1069), 437 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1069 transitions. [2021-06-05 22:27:33,771 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1069 transitions. Word has length 26 [2021-06-05 22:27:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:33,771 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1069 transitions. [2021-06-05 22:27:33,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1069 transitions. [2021-06-05 22:27:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:33,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:33,772 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:33,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:33,993 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:33,993 INFO L82 PathProgramCache]: Analyzing trace with hash -37102664, now seen corresponding path program 28 times [2021-06-05 22:27:33,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:33,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874252020] [2021-06-05 22:27:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:34,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874252020] [2021-06-05 22:27:34,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874252020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:34,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510684840] [2021-06-05 22:27:34,065 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 [2021-06-05 22:27:34,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:34,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:34,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:34,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510684840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:34,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:34,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:34,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528841327] [2021-06-05 22:27:34,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:34,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:34,316 INFO L87 Difference]: Start difference. First operand 438 states and 1069 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:34,632 INFO L93 Difference]: Finished difference Result 720 states and 1704 transitions. [2021-06-05 22:27:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:34,635 INFO L225 Difference]: With dead ends: 720 [2021-06-05 22:27:34,635 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 22:27:34,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:27:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 22:27:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 446. [2021-06-05 22:27:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.447191011235955) internal successors, (1089), 445 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1089 transitions. [2021-06-05 22:27:34,640 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1089 transitions. Word has length 26 [2021-06-05 22:27:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:34,640 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1089 transitions. [2021-06-05 22:27:34,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1089 transitions. [2021-06-05 22:27:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:34,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:34,641 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:34,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 22:27:34,842 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1675418936, now seen corresponding path program 29 times [2021-06-05 22:27:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:34,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815352888] [2021-06-05 22:27:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:34,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815352888] [2021-06-05 22:27:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815352888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:34,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232969366] [2021-06-05 22:27:34,919 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 [2021-06-05 22:27:34,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232969366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:35,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:35,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080309034] [2021-06-05 22:27:35,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:35,148 INFO L87 Difference]: Start difference. First operand 446 states and 1089 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:35,478 INFO L93 Difference]: Finished difference Result 634 states and 1499 transitions. [2021-06-05 22:27:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:35,480 INFO L225 Difference]: With dead ends: 634 [2021-06-05 22:27:35,480 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 22:27:35,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:35,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 22:27:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 470. [2021-06-05 22:27:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.458422174840085) internal successors, (1153), 469 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:35,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1153 transitions. [2021-06-05 22:27:35,487 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1153 transitions. Word has length 26 [2021-06-05 22:27:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:35,487 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1153 transitions. [2021-06-05 22:27:35,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1153 transitions. [2021-06-05 22:27:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:35,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:35,488 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:35,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:35,695 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1238039736, now seen corresponding path program 30 times [2021-06-05 22:27:35,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:35,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335325879] [2021-06-05 22:27:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:35,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335325879] [2021-06-05 22:27:35,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335325879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:35,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875799578] [2021-06-05 22:27:35,775 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 [2021-06-05 22:27:35,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:27:35,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:36,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875799578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:36,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:36,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023317777] [2021-06-05 22:27:36,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:36,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:36,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:36,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:36,002 INFO L87 Difference]: Start difference. First operand 470 states and 1153 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:36,343 INFO L93 Difference]: Finished difference Result 636 states and 1548 transitions. [2021-06-05 22:27:36,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:36,345 INFO L225 Difference]: With dead ends: 636 [2021-06-05 22:27:36,345 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 22:27:36,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 22:27:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 486. [2021-06-05 22:27:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-06-05 22:27:36,351 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-06-05 22:27:36,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:36,351 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-06-05 22:27:36,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-06-05 22:27:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:27:36,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:36,352 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:36,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 22:27:36,553 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:36,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1700991628, now seen corresponding path program 31 times [2021-06-05 22:27:36,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:36,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972916617] [2021-06-05 22:27:36,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:36,619 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:36,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:36,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972916617] [2021-06-05 22:27:36,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972916617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:36,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540925224] [2021-06-05 22:27:36,620 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 [2021-06-05 22:27:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540925224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:36,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:36,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 22:27:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990571640] [2021-06-05 22:27:36,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:27:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:36,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:27:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:27:36,877 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:37,237 INFO L93 Difference]: Finished difference Result 604 states and 1468 transitions. [2021-06-05 22:27:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:27:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:37,239 INFO L225 Difference]: With dead ends: 604 [2021-06-05 22:27:37,240 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 22:27:37,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:27:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 22:27:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 486. [2021-06-05 22:27:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.45979381443299) internal successors, (1193), 485 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1193 transitions. [2021-06-05 22:27:37,248 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1193 transitions. Word has length 26 [2021-06-05 22:27:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:37,248 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1193 transitions. [2021-06-05 22:27:37,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1193 transitions. [2021-06-05 22:27:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:37,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:37,249 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:37,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2021-06-05 22:27:37,472 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:37,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:37,473 INFO L82 PathProgramCache]: Analyzing trace with hash 638992838, now seen corresponding path program 5 times [2021-06-05 22:27:37,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:37,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179277082] [2021-06-05 22:27:37,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:37,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:37,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179277082] [2021-06-05 22:27:37,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179277082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:37,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929552930] [2021-06-05 22:27:37,581 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 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 [2021-06-05 22:27:37,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:27:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 22:27:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:37,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929552930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:37,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:37,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895988938] [2021-06-05 22:27:37,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:37,891 INFO L87 Difference]: Start difference. First operand 486 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:38,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:38,255 INFO L93 Difference]: Finished difference Result 554 states and 1340 transitions. [2021-06-05 22:27:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:27:38,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:38,257 INFO L225 Difference]: With dead ends: 554 [2021-06-05 22:27:38,257 INFO L226 Difference]: Without dead ends: 524 [2021-06-05 22:27:38,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:27:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-05 22:27:38,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 500. [2021-06-05 22:27:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.4549098196392785) internal successors, (1225), 499 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1225 transitions. [2021-06-05 22:27:38,262 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1225 transitions. Word has length 28 [2021-06-05 22:27:38,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:38,262 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1225 transitions. [2021-06-05 22:27:38,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:38,262 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1225 transitions. [2021-06-05 22:27:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:38,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:38,263 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:38,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:38,463 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:38,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:38,464 INFO L82 PathProgramCache]: Analyzing trace with hash 808435006, now seen corresponding path program 32 times [2021-06-05 22:27:38,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:38,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936649591] [2021-06-05 22:27:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:38,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936649591] [2021-06-05 22:27:38,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936649591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:38,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771509835] [2021-06-05 22:27:38,585 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 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 [2021-06-05 22:27:38,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:38,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:38,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771509835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:38,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:38,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:38,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873201966] [2021-06-05 22:27:38,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:38,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:38,910 INFO L87 Difference]: Start difference. First operand 500 states and 1225 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:39,424 INFO L93 Difference]: Finished difference Result 650 states and 1584 transitions. [2021-06-05 22:27:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:39,426 INFO L225 Difference]: With dead ends: 650 [2021-06-05 22:27:39,426 INFO L226 Difference]: Without dead ends: 628 [2021-06-05 22:27:39,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:27:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-05 22:27:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 508. [2021-06-05 22:27:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.455621301775148) internal successors, (1245), 507 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1245 transitions. [2021-06-05 22:27:39,432 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1245 transitions. Word has length 28 [2021-06-05 22:27:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:39,432 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1245 transitions. [2021-06-05 22:27:39,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1245 transitions. [2021-06-05 22:27:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:39,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:39,433 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:39,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 22:27:39,656 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash -945290426, now seen corresponding path program 33 times [2021-06-05 22:27:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:39,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905251461] [2021-06-05 22:27:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:39,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:39,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905251461] [2021-06-05 22:27:39,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905251461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:39,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659489230] [2021-06-05 22:27:39,741 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 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 [2021-06-05 22:27:39,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:39,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659489230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020754704] [2021-06-05 22:27:40,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:40,014 INFO L87 Difference]: Start difference. First operand 508 states and 1245 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:40,483 INFO L93 Difference]: Finished difference Result 706 states and 1716 transitions. [2021-06-05 22:27:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:27:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:40,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:40,485 INFO L225 Difference]: With dead ends: 706 [2021-06-05 22:27:40,485 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 22:27:40,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:27:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 22:27:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 556. [2021-06-05 22:27:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-06-05 22:27:40,492 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-06-05 22:27:40,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:40,492 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-06-05 22:27:40,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-06-05 22:27:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:40,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:40,494 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:40,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:40,697 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash 282407170, now seen corresponding path program 34 times [2021-06-05 22:27:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:40,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856549567] [2021-06-05 22:27:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:40,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856549567] [2021-06-05 22:27:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856549567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023075888] [2021-06-05 22:27:40,792 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 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 [2021-06-05 22:27:40,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:40,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:40,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023075888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:41,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:41,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:41,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346517531] [2021-06-05 22:27:41,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:41,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:41,105 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:41,429 INFO L93 Difference]: Finished difference Result 674 states and 1636 transitions. [2021-06-05 22:27:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:41,431 INFO L225 Difference]: With dead ends: 674 [2021-06-05 22:27:41,431 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 22:27:41,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 22:27:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 556. [2021-06-05 22:27:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.4594594594594597) internal successors, (1365), 555 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1365 transitions. [2021-06-05 22:27:41,437 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1365 transitions. Word has length 28 [2021-06-05 22:27:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:41,437 INFO L482 AbstractCegarLoop]: Abstraction has 556 states and 1365 transitions. [2021-06-05 22:27:41,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1365 transitions. [2021-06-05 22:27:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:41,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:41,438 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:41,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 22:27:41,639 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash 470097470, now seen corresponding path program 35 times [2021-06-05 22:27:41,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:41,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789791271] [2021-06-05 22:27:41,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:41,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789791271] [2021-06-05 22:27:41,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789791271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:41,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618369542] [2021-06-05 22:27:41,741 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 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 [2021-06-05 22:27:41,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:27:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:42,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618369542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:42,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:42,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:42,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888138887] [2021-06-05 22:27:42,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:42,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:42,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:42,067 INFO L87 Difference]: Start difference. First operand 556 states and 1365 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:42,528 INFO L93 Difference]: Finished difference Result 714 states and 1740 transitions. [2021-06-05 22:27:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:42,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:42,531 INFO L225 Difference]: With dead ends: 714 [2021-06-05 22:27:42,531 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 22:27:42,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 576.1ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 22:27:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 564. [2021-06-05 22:27:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:42,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-06-05 22:27:42,537 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-06-05 22:27:42,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:42,537 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-06-05 22:27:42,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:42,537 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-06-05 22:27:42,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:42,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:42,538 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:42,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:42,738 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:42,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:42,739 INFO L82 PathProgramCache]: Analyzing trace with hash 264159038, now seen corresponding path program 36 times [2021-06-05 22:27:42,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:42,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033693454] [2021-06-05 22:27:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:42,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033693454] [2021-06-05 22:27:42,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033693454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:42,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077849882] [2021-06-05 22:27:42,834 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 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 [2021-06-05 22:27:42,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:27:42,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:42,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:42,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:43,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077849882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:43,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:43,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:43,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105247486] [2021-06-05 22:27:43,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:43,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:43,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:43,152 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:43,616 INFO L93 Difference]: Finished difference Result 722 states and 1760 transitions. [2021-06-05 22:27:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:43,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:43,619 INFO L225 Difference]: With dead ends: 722 [2021-06-05 22:27:43,619 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 22:27:43,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:27:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 22:27:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 572. [2021-06-05 22:27:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.460595446584939) internal successors, (1405), 571 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1405 transitions. [2021-06-05 22:27:43,625 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1405 transitions. Word has length 28 [2021-06-05 22:27:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:43,625 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1405 transitions. [2021-06-05 22:27:43,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1405 transitions. [2021-06-05 22:27:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:43,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:43,626 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:43,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:43,826 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:43,826 INFO L82 PathProgramCache]: Analyzing trace with hash 451849338, now seen corresponding path program 37 times [2021-06-05 22:27:43,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:43,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996411602] [2021-06-05 22:27:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996411602] [2021-06-05 22:27:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996411602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118198633] [2021-06-05 22:27:43,921 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 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 [2021-06-05 22:27:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:43,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:27:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:44,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118198633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:44,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:44,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129150909] [2021-06-05 22:27:44,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:44,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:44,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:44,157 INFO L87 Difference]: Start difference. First operand 572 states and 1405 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:44,497 INFO L93 Difference]: Finished difference Result 658 states and 1604 transitions. [2021-06-05 22:27:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:44,500 INFO L225 Difference]: With dead ends: 658 [2021-06-05 22:27:44,500 INFO L226 Difference]: Without dead ends: 636 [2021-06-05 22:27:44,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:27:44,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-05 22:27:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 564. [2021-06-05 22:27:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 2.4600355239786857) internal successors, (1385), 563 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1385 transitions. [2021-06-05 22:27:44,508 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1385 transitions. Word has length 28 [2021-06-05 22:27:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:44,508 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1385 transitions. [2021-06-05 22:27:44,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1385 transitions. [2021-06-05 22:27:44,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:44,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:44,509 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:44,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 22:27:44,710 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:44,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:44,710 INFO L82 PathProgramCache]: Analyzing trace with hash 280163074, now seen corresponding path program 38 times [2021-06-05 22:27:44,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:44,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970765526] [2021-06-05 22:27:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:44,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970765526] [2021-06-05 22:27:44,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970765526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:44,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125693] [2021-06-05 22:27:44,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:27:44,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:45,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:45,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:45,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:45,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753247528] [2021-06-05 22:27:45,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:45,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:45,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:45,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:45,102 INFO L87 Difference]: Start difference. First operand 564 states and 1385 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:45,550 INFO L93 Difference]: Finished difference Result 786 states and 1916 transitions. [2021-06-05 22:27:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:27:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:45,552 INFO L225 Difference]: With dead ends: 786 [2021-06-05 22:27:45,552 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 22:27:45,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:27:45,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 22:27:45,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 604. [2021-06-05 22:27:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.462686567164179) internal successors, (1485), 603 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1485 transitions. [2021-06-05 22:27:45,561 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1485 transitions. Word has length 28 [2021-06-05 22:27:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:45,561 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1485 transitions. [2021-06-05 22:27:45,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:45,562 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1485 transitions. [2021-06-05 22:27:45,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:45,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:45,562 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:45,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:45,763 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1539301438, now seen corresponding path program 39 times [2021-06-05 22:27:45,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:45,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434199141] [2021-06-05 22:27:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:45,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434199141] [2021-06-05 22:27:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434199141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001783363] [2021-06-05 22:27:45,856 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 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 [2021-06-05 22:27:45,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:27:45,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:45,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:45,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:46,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001783363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:46,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:46,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:46,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084009911] [2021-06-05 22:27:46,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:46,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:46,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:46,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:46,148 INFO L87 Difference]: Start difference. First operand 604 states and 1485 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:46,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:46,500 INFO L93 Difference]: Finished difference Result 754 states and 1840 transitions. [2021-06-05 22:27:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:46,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:46,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:46,501 INFO L225 Difference]: With dead ends: 754 [2021-06-05 22:27:46,502 INFO L226 Difference]: Without dead ends: 724 [2021-06-05 22:27:46,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-05 22:27:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 612. [2021-06-05 22:27:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-06-05 22:27:46,517 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-06-05 22:27:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:46,518 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-06-05 22:27:46,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-06-05 22:27:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:46,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:46,518 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:46,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 22:27:46,719 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1726991738, now seen corresponding path program 40 times [2021-06-05 22:27:46,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:46,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999351417] [2021-06-05 22:27:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:46,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999351417] [2021-06-05 22:27:46,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999351417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:46,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220272098] [2021-06-05 22:27:46,816 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 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 [2021-06-05 22:27:46,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:46,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:27:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:47,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220272098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:47,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:47,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:47,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735925924] [2021-06-05 22:27:47,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:47,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:47,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:47,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:47,056 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:47,410 INFO L93 Difference]: Finished difference Result 738 states and 1804 transitions. [2021-06-05 22:27:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:27:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:47,412 INFO L225 Difference]: With dead ends: 738 [2021-06-05 22:27:47,412 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 22:27:47,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:27:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 22:27:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 588. [2021-06-05 22:27:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.4616695059625213) internal successors, (1445), 587 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1445 transitions. [2021-06-05 22:27:47,419 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1445 transitions. Word has length 28 [2021-06-05 22:27:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:47,419 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1445 transitions. [2021-06-05 22:27:47,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1445 transitions. [2021-06-05 22:27:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:47,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:47,420 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:47,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:47,622 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:47,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:47,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1175543362, now seen corresponding path program 41 times [2021-06-05 22:27:47,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:47,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226881305] [2021-06-05 22:27:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:47,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:47,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226881305] [2021-06-05 22:27:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226881305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:47,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978777893] [2021-06-05 22:27:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:27:47,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:27:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:47,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:48,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978777893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:48,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:48,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:48,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132923136] [2021-06-05 22:27:48,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:48,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:48,099 INFO L87 Difference]: Start difference. First operand 588 states and 1445 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:48,586 INFO L93 Difference]: Finished difference Result 746 states and 1824 transitions. [2021-06-05 22:27:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:48,588 INFO L225 Difference]: With dead ends: 746 [2021-06-05 22:27:48,588 INFO L226 Difference]: Without dead ends: 724 [2021-06-05 22:27:48,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 665.1ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-06-05 22:27:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 620. [2021-06-05 22:27:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 2.4636510500807756) internal successors, (1525), 619 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1525 transitions. [2021-06-05 22:27:48,594 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1525 transitions. Word has length 28 [2021-06-05 22:27:48,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:48,595 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 1525 transitions. [2021-06-05 22:27:48,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1525 transitions. [2021-06-05 22:27:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:48,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:48,596 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:48,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:48,818 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1388654202, now seen corresponding path program 42 times [2021-06-05 22:27:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:48,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368133754] [2021-06-05 22:27:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:48,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:48,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368133754] [2021-06-05 22:27:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368133754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:48,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286626838] [2021-06-05 22:27:48,920 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 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 [2021-06-05 22:27:48,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:27:48,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:48,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:49,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286626838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:49,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:49,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:49,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311514015] [2021-06-05 22:27:49,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:49,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:49,278 INFO L87 Difference]: Start difference. First operand 620 states and 1525 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:49,721 INFO L93 Difference]: Finished difference Result 770 states and 1884 transitions. [2021-06-05 22:27:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:49,722 INFO L225 Difference]: With dead ends: 770 [2021-06-05 22:27:49,722 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 22:27:49,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 617.5ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 22:27:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 612. [2021-06-05 22:27:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 2.463175122749591) internal successors, (1505), 611 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1505 transitions. [2021-06-05 22:27:49,729 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1505 transitions. Word has length 28 [2021-06-05 22:27:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:49,729 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1505 transitions. [2021-06-05 22:27:49,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1505 transitions. [2021-06-05 22:27:49,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:49,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:49,730 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:49,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 22:27:49,930 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:49,931 INFO L82 PathProgramCache]: Analyzing trace with hash -238558138, now seen corresponding path program 43 times [2021-06-05 22:27:49,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:49,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618507384] [2021-06-05 22:27:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:50,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:50,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618507384] [2021-06-05 22:27:50,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618507384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:50,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126502723] [2021-06-05 22:27:50,068 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 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 [2021-06-05 22:27:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:50,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126502723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:50,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:50,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:50,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000593310] [2021-06-05 22:27:50,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:50,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:50,335 INFO L87 Difference]: Start difference. First operand 612 states and 1505 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:50,896 INFO L93 Difference]: Finished difference Result 746 states and 1820 transitions. [2021-06-05 22:27:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:27:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:50,897 INFO L225 Difference]: With dead ends: 746 [2021-06-05 22:27:50,897 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 22:27:50,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:27:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 22:27:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 660. [2021-06-05 22:27:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-06-05 22:27:50,905 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-06-05 22:27:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:50,905 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-06-05 22:27:50,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-06-05 22:27:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:50,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:50,906 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:51,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 22:27:51,121 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1409498818, now seen corresponding path program 44 times [2021-06-05 22:27:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:51,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475579116] [2021-06-05 22:27:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:51,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475579116] [2021-06-05 22:27:51,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475579116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940234882] [2021-06-05 22:27:51,239 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 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 [2021-06-05 22:27:51,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:51,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940234882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:51,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:51,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322866038] [2021-06-05 22:27:51,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:51,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:51,529 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:51,948 INFO L93 Difference]: Finished difference Result 786 states and 1920 transitions. [2021-06-05 22:27:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:51,950 INFO L225 Difference]: With dead ends: 786 [2021-06-05 22:27:51,950 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 22:27:51,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 22:27:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 660. [2021-06-05 22:27:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.465857359635812) internal successors, (1625), 659 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1625 transitions. [2021-06-05 22:27:51,960 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1625 transitions. Word has length 28 [2021-06-05 22:27:51,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:51,960 INFO L482 AbstractCegarLoop]: Abstraction has 660 states and 1625 transitions. [2021-06-05 22:27:51,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1625 transitions. [2021-06-05 22:27:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:51,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:51,961 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:52,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:52,183 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 170623678, now seen corresponding path program 45 times [2021-06-05 22:27:52,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:52,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721162777] [2021-06-05 22:27:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:52,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:52,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721162777] [2021-06-05 22:27:52,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721162777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:52,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490736664] [2021-06-05 22:27:52,281 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 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 [2021-06-05 22:27:52,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:27:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:52,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:52,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490736664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:52,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:52,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:52,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163359997] [2021-06-05 22:27:52,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:52,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:52,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:52,607 INFO L87 Difference]: Start difference. First operand 660 states and 1625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:53,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:53,033 INFO L93 Difference]: Finished difference Result 810 states and 1984 transitions. [2021-06-05 22:27:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:53,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:53,035 INFO L225 Difference]: With dead ends: 810 [2021-06-05 22:27:53,035 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 22:27:53,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 22:27:53,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 668. [2021-06-05 22:27:53,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.4662668665667167) internal successors, (1645), 667 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1645 transitions. [2021-06-05 22:27:53,043 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1645 transitions. Word has length 28 [2021-06-05 22:27:53,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:53,043 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 1645 transitions. [2021-06-05 22:27:53,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1645 transitions. [2021-06-05 22:27:53,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:53,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:53,044 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:53,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 22:27:53,265 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:53,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:53,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1578394186, now seen corresponding path program 46 times [2021-06-05 22:27:53,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:53,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93574182] [2021-06-05 22:27:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:53,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:53,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93574182] [2021-06-05 22:27:53,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93574182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:53,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925746893] [2021-06-05 22:27:53,431 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 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 [2021-06-05 22:27:53,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:53,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:53,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:53,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925746893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:53,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:53,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:53,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464681836] [2021-06-05 22:27:53,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:53,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:53,764 INFO L87 Difference]: Start difference. First operand 668 states and 1645 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:54,249 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-06-05 22:27:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:54,250 INFO L225 Difference]: With dead ends: 794 [2021-06-05 22:27:54,250 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 22:27:54,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 731.8ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:54,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 22:27:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 684. [2021-06-05 22:27:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 22:27:54,257 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 22:27:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:54,257 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 22:27:54,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 22:27:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:54,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:54,257 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:54,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-05 22:27:54,458 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:54,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:54,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1445766078, now seen corresponding path program 47 times [2021-06-05 22:27:54,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:54,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234152530] [2021-06-05 22:27:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:54,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:54,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234152530] [2021-06-05 22:27:54,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234152530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:54,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179841770] [2021-06-05 22:27:54,583 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 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 [2021-06-05 22:27:54,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:27:54,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:54,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:54,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:54,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179841770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:54,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:54,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:54,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177853072] [2021-06-05 22:27:54,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:54,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:54,949 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:55,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:55,330 INFO L93 Difference]: Finished difference Result 802 states and 1964 transitions. [2021-06-05 22:27:55,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:55,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:55,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:55,331 INFO L225 Difference]: With dead ends: 802 [2021-06-05 22:27:55,331 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 22:27:55,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:55,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 22:27:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 692. [2021-06-05 22:27:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-06-05 22:27:55,337 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-06-05 22:27:55,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:55,338 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-06-05 22:27:55,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-06-05 22:27:55,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:55,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:55,338 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:55,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 22:27:55,550 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -285003654, now seen corresponding path program 48 times [2021-06-05 22:27:55,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:55,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282325191] [2021-06-05 22:27:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:55,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282325191] [2021-06-05 22:27:55,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282325191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999520466] [2021-06-05 22:27:55,640 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 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 [2021-06-05 22:27:55,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:27:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:55,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:55,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999520466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:55,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:55,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:55,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284249492] [2021-06-05 22:27:55,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:55,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:55,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:55,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:55,979 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:56,381 INFO L93 Difference]: Finished difference Result 834 states and 2044 transitions. [2021-06-05 22:27:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:27:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:56,382 INFO L225 Difference]: With dead ends: 834 [2021-06-05 22:27:56,382 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 22:27:56,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:27:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 22:27:56,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 684. [2021-06-05 22:27:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 22:27:56,390 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 22:27:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:56,390 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 22:27:56,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 22:27:56,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:56,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:56,391 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:56,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:56,608 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:56,608 INFO L82 PathProgramCache]: Analyzing trace with hash -303251786, now seen corresponding path program 49 times [2021-06-05 22:27:56,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:56,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055381543] [2021-06-05 22:27:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:56,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055381543] [2021-06-05 22:27:56,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055381543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:56,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571545630] [2021-06-05 22:27:56,745 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 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 [2021-06-05 22:27:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:57,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571545630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:57,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:57,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:57,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611085043] [2021-06-05 22:27:57,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:57,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:57,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:57,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:57,062 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:57,487 INFO L93 Difference]: Finished difference Result 826 states and 2016 transitions. [2021-06-05 22:27:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:27:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:57,488 INFO L225 Difference]: With dead ends: 826 [2021-06-05 22:27:57,488 INFO L226 Difference]: Without dead ends: 788 [2021-06-05 22:27:57,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:27:57,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-06-05 22:27:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 684. [2021-06-05 22:27:57,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4670571010248903) internal successors, (1685), 683 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1685 transitions. [2021-06-05 22:27:57,495 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1685 transitions. Word has length 28 [2021-06-05 22:27:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:57,495 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1685 transitions. [2021-06-05 22:27:57,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1685 transitions. [2021-06-05 22:27:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:57,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:57,496 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:57,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:57,696 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:57,697 INFO L82 PathProgramCache]: Analyzing trace with hash -829279622, now seen corresponding path program 50 times [2021-06-05 22:27:57,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:57,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425132513] [2021-06-05 22:27:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:57,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425132513] [2021-06-05 22:27:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425132513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053517115] [2021-06-05 22:27:57,776 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 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 [2021-06-05 22:27:57,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:27:57,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:57,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:57,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053517115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:58,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836780080] [2021-06-05 22:27:58,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:58,046 INFO L87 Difference]: Start difference. First operand 684 states and 1685 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:58,346 INFO L93 Difference]: Finished difference Result 794 states and 1936 transitions. [2021-06-05 22:27:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:27:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:58,348 INFO L225 Difference]: With dead ends: 794 [2021-06-05 22:27:58,348 INFO L226 Difference]: Without dead ends: 756 [2021-06-05 22:27:58,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:27:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-06-05 22:27:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 692. [2021-06-05 22:27:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 2.467438494934877) internal successors, (1705), 691 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:58,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1705 transitions. [2021-06-05 22:27:58,357 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1705 transitions. Word has length 28 [2021-06-05 22:27:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:58,358 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 1705 transitions. [2021-06-05 22:27:58,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1705 transitions. [2021-06-05 22:27:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:58,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:58,359 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:58,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:58,559 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -641589322, now seen corresponding path program 51 times [2021-06-05 22:27:58,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:58,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807951500] [2021-06-05 22:27:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807951500] [2021-06-05 22:27:58,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807951500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120960650] [2021-06-05 22:27:58,647 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:58,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:27:58,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:58,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:58,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:58,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:58,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120960650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:58,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:58,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:58,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341664186] [2021-06-05 22:27:58,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:58,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:58,940 INFO L87 Difference]: Start difference. First operand 692 states and 1705 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:27:59,413 INFO L93 Difference]: Finished difference Result 842 states and 2052 transitions. [2021-06-05 22:27:59,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:27:59,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:27:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:27:59,414 INFO L225 Difference]: With dead ends: 842 [2021-06-05 22:27:59,414 INFO L226 Difference]: Without dead ends: 796 [2021-06-05 22:27:59,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:27:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-05 22:27:59,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 708. [2021-06-05 22:27:59,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.468175388967468) internal successors, (1745), 707 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:27:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1745 transitions. [2021-06-05 22:27:59,421 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1745 transitions. Word has length 28 [2021-06-05 22:27:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:27:59,421 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 1745 transitions. [2021-06-05 22:27:59,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:27:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1745 transitions. [2021-06-05 22:27:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:27:59,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:27:59,422 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:27:59,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 22:27:59,637 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:27:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:27:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -322191042, now seen corresponding path program 52 times [2021-06-05 22:27:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:27:59,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534423333] [2021-06-05 22:27:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:27:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:27:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:59,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:27:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534423333] [2021-06-05 22:27:59,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534423333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:59,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94995333] [2021-06-05 22:27:59,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:27:59,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:27:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:27:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:27:59,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:27:59,987 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:27:59,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94995333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:27:59,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:27:59,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:27:59,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866901063] [2021-06-05 22:27:59,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:27:59,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:27:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:27:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:27:59,988 INFO L87 Difference]: Start difference. First operand 708 states and 1745 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:00,322 INFO L93 Difference]: Finished difference Result 818 states and 2004 transitions. [2021-06-05 22:28:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:00,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:00,323 INFO L225 Difference]: With dead ends: 818 [2021-06-05 22:28:00,323 INFO L226 Difference]: Without dead ends: 796 [2021-06-05 22:28:00,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-06-05 22:28:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 716. [2021-06-05 22:28:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-06-05 22:28:00,342 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-06-05 22:28:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:00,342 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-06-05 22:28:00,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-06-05 22:28:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:00,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:00,343 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:00,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable568,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:00,557 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash -528129474, now seen corresponding path program 53 times [2021-06-05 22:28:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:00,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362388789] [2021-06-05 22:28:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:00,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:00,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362388789] [2021-06-05 22:28:00,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362388789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:00,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28410305] [2021-06-05 22:28:00,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:00,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28410305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:00,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:00,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:00,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312725041] [2021-06-05 22:28:00,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:00,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:00,957 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:01,296 INFO L93 Difference]: Finished difference Result 850 states and 2080 transitions. [2021-06-05 22:28:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:01,298 INFO L225 Difference]: With dead ends: 850 [2021-06-05 22:28:01,298 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 22:28:01,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:28:01,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 22:28:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 716. [2021-06-05 22:28:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4685314685314683) internal successors, (1765), 715 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1765 transitions. [2021-06-05 22:28:01,308 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1765 transitions. Word has length 28 [2021-06-05 22:28:01,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:01,308 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1765 transitions. [2021-06-05 22:28:01,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:01,308 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1765 transitions. [2021-06-05 22:28:01,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:01,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:01,309 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:01,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,531 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:01,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:01,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1051993022, now seen corresponding path program 54 times [2021-06-05 22:28:01,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:01,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542171607] [2021-06-05 22:28:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:01,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542171607] [2021-06-05 22:28:01,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542171607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857720358] [2021-06-05 22:28:01,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:01,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:28:01,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:01,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857720358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:01,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:01,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:01,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706982069] [2021-06-05 22:28:01,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:01,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:01,915 INFO L87 Difference]: Start difference. First operand 716 states and 1765 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:02,306 INFO L93 Difference]: Finished difference Result 866 states and 2120 transitions. [2021-06-05 22:28:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:02,307 INFO L225 Difference]: With dead ends: 866 [2021-06-05 22:28:02,307 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 22:28:02,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 547.5ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 22:28:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 732. [2021-06-05 22:28:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-06-05 22:28:02,315 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-06-05 22:28:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:02,315 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-06-05 22:28:02,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-06-05 22:28:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:02,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:02,316 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:02,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:02,517 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash -678776710, now seen corresponding path program 55 times [2021-06-05 22:28:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:02,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460802128] [2021-06-05 22:28:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:02,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460802128] [2021-06-05 22:28:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460802128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:02,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125638254] [2021-06-05 22:28:02,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:02,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:02,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125638254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:02,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:02,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:02,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251659407] [2021-06-05 22:28:02,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:02,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:02,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:02,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:02,960 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:03,330 INFO L93 Difference]: Finished difference Result 890 states and 2184 transitions. [2021-06-05 22:28:03,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:03,331 INFO L225 Difference]: With dead ends: 890 [2021-06-05 22:28:03,331 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 22:28:03,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:28:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 22:28:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 732. [2021-06-05 22:28:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.46922024623803) internal successors, (1805), 731 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1805 transitions. [2021-06-05 22:28:03,341 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1805 transitions. Word has length 28 [2021-06-05 22:28:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:03,342 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1805 transitions. [2021-06-05 22:28:03,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1805 transitions. [2021-06-05 22:28:03,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:03,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:03,343 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:03,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,557 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:03,557 INFO L82 PathProgramCache]: Analyzing trace with hash -884715142, now seen corresponding path program 56 times [2021-06-05 22:28:03,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:03,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362539573] [2021-06-05 22:28:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:03,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362539573] [2021-06-05 22:28:03,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362539573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:03,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262742511] [2021-06-05 22:28:03,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:03,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:03,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:03,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:03,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262742511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:03,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:03,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605574495] [2021-06-05 22:28:03,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:03,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:03,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:03,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:03,913 INFO L87 Difference]: Start difference. First operand 732 states and 1805 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:04,209 INFO L93 Difference]: Finished difference Result 882 states and 2156 transitions. [2021-06-05 22:28:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:28:04,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:04,211 INFO L225 Difference]: With dead ends: 882 [2021-06-05 22:28:04,211 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 22:28:04,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:28:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 22:28:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 748. [2021-06-05 22:28:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-06-05 22:28:04,221 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-06-05 22:28:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:04,221 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-06-05 22:28:04,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-06-05 22:28:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:04,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:04,222 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:04,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable624,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:04,437 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:04,437 INFO L82 PathProgramCache]: Analyzing trace with hash -697024842, now seen corresponding path program 57 times [2021-06-05 22:28:04,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:04,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224435849] [2021-06-05 22:28:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:04,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224435849] [2021-06-05 22:28:04,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224435849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008003472] [2021-06-05 22:28:04,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:04,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:28:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008003472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:04,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:04,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:04,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522706696] [2021-06-05 22:28:04,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:04,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:04,887 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:05,284 INFO L93 Difference]: Finished difference Result 898 states and 2192 transitions. [2021-06-05 22:28:05,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:05,286 INFO L225 Difference]: With dead ends: 898 [2021-06-05 22:28:05,286 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:28:05,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:28:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:28:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 748. [2021-06-05 22:28:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.4698795180722892) internal successors, (1845), 747 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1845 transitions. [2021-06-05 22:28:05,295 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1845 transitions. Word has length 28 [2021-06-05 22:28:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:05,296 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1845 transitions. [2021-06-05 22:28:05,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1845 transitions. [2021-06-05 22:28:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:05,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:05,297 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:05,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-06-05 22:28:05,497 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:05,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1967831874, now seen corresponding path program 58 times [2021-06-05 22:28:05,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:05,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974268182] [2021-06-05 22:28:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:05,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:05,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974268182] [2021-06-05 22:28:05,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974268182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:05,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913190012] [2021-06-05 22:28:05,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:05,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:05,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913190012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:05,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:05,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:05,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176442701] [2021-06-05 22:28:05,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:05,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:05,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:05,898 INFO L87 Difference]: Start difference. First operand 748 states and 1845 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:06,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:06,283 INFO L93 Difference]: Finished difference Result 874 states and 2144 transitions. [2021-06-05 22:28:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:06,285 INFO L225 Difference]: With dead ends: 874 [2021-06-05 22:28:06,285 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:28:06,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:28:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 740. [2021-06-05 22:28:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.469553450608931) internal successors, (1825), 739 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1825 transitions. [2021-06-05 22:28:06,294 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1825 transitions. Word has length 28 [2021-06-05 22:28:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:06,295 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1825 transitions. [2021-06-05 22:28:06,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1825 transitions. [2021-06-05 22:28:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:06,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:06,296 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:06,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable660 [2021-06-05 22:28:06,509 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1175607874, now seen corresponding path program 59 times [2021-06-05 22:28:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788613421] [2021-06-05 22:28:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:06,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788613421] [2021-06-05 22:28:06,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788613421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:06,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306398966] [2021-06-05 22:28:06,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:06,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:06,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306398966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:06,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:06,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448229934] [2021-06-05 22:28:06,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:06,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:06,895 INFO L87 Difference]: Start difference. First operand 740 states and 1825 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:07,343 INFO L93 Difference]: Finished difference Result 858 states and 2100 transitions. [2021-06-05 22:28:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:07,345 INFO L225 Difference]: With dead ends: 858 [2021-06-05 22:28:07,345 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 22:28:07,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 22:28:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 716. [2021-06-05 22:28:07,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-06-05 22:28:07,351 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-06-05 22:28:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:07,351 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-06-05 22:28:07,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-06-05 22:28:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:07,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:07,352 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:07,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 22:28:07,562 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:07,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1970549754, now seen corresponding path program 60 times [2021-06-05 22:28:07,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:07,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225906254] [2021-06-05 22:28:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:07,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:07,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225906254] [2021-06-05 22:28:07,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225906254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:07,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832652006] [2021-06-05 22:28:07,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:07,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:28:07,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:07,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832652006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:07,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:07,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:07,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405508706] [2021-06-05 22:28:07,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:07,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:07,947 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:08,343 INFO L93 Difference]: Finished difference Result 918 states and 2183 transitions. [2021-06-05 22:28:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:08,344 INFO L225 Difference]: With dead ends: 918 [2021-06-05 22:28:08,345 INFO L226 Difference]: Without dead ends: 888 [2021-06-05 22:28:08,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-05 22:28:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 716. [2021-06-05 22:28:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.462937062937063) internal successors, (1761), 715 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1761 transitions. [2021-06-05 22:28:08,351 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1761 transitions. Word has length 28 [2021-06-05 22:28:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:08,351 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1761 transitions. [2021-06-05 22:28:08,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1761 transitions. [2021-06-05 22:28:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:08,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:08,352 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:08,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable689,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:08,553 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash 221531890, now seen corresponding path program 61 times [2021-06-05 22:28:08,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:08,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855990766] [2021-06-05 22:28:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:08,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855990766] [2021-06-05 22:28:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855990766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803038762] [2021-06-05 22:28:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:08,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:08,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803038762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:08,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:08,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:08,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225133272] [2021-06-05 22:28:08,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:08,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:08,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:08,864 INFO L87 Difference]: Start difference. First operand 716 states and 1761 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:09,230 INFO L93 Difference]: Finished difference Result 770 states and 1876 transitions. [2021-06-05 22:28:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:09,230 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:09,231 INFO L225 Difference]: With dead ends: 770 [2021-06-05 22:28:09,231 INFO L226 Difference]: Without dead ends: 748 [2021-06-05 22:28:09,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-05 22:28:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 716. [2021-06-05 22:28:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-06-05 22:28:09,237 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-06-05 22:28:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:09,237 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-06-05 22:28:09,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-06-05 22:28:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:09,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:09,238 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:09,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable704 [2021-06-05 22:28:09,439 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1754842430, now seen corresponding path program 62 times [2021-06-05 22:28:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:09,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367882193] [2021-06-05 22:28:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:09,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:09,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367882193] [2021-06-05 22:28:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367882193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:09,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645773715] [2021-06-05 22:28:09,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:09,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:09,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645773715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:09,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:09,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123595657] [2021-06-05 22:28:09,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:09,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:09,790 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:10,364 INFO L93 Difference]: Finished difference Result 874 states and 2132 transitions. [2021-06-05 22:28:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:10,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:10,365 INFO L225 Difference]: With dead ends: 874 [2021-06-05 22:28:10,365 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 22:28:10,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=283, Invalid=1049, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 22:28:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 724. [2021-06-05 22:28:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 2.4578146611341634) internal successors, (1777), 723 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1777 transitions. [2021-06-05 22:28:10,372 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1777 transitions. Word has length 28 [2021-06-05 22:28:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:10,372 INFO L482 AbstractCegarLoop]: Abstraction has 724 states and 1777 transitions. [2021-06-05 22:28:10,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1777 transitions. [2021-06-05 22:28:10,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:10,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:10,373 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:10,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:10,573 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1924284598, now seen corresponding path program 63 times [2021-06-05 22:28:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649134683] [2021-06-05 22:28:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:10,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:10,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649134683] [2021-06-05 22:28:10,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649134683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:10,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591792399] [2021-06-05 22:28:10,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:10,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:10,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591792399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:11,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:11,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341647691] [2021-06-05 22:28:11,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:11,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:11,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:11,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:11,045 INFO L87 Difference]: Start difference. First operand 724 states and 1777 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:11,499 INFO L93 Difference]: Finished difference Result 914 states and 2224 transitions. [2021-06-05 22:28:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:11,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:11,500 INFO L225 Difference]: With dead ends: 914 [2021-06-05 22:28:11,500 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 22:28:11,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:28:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 22:28:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 716. [2021-06-05 22:28:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.4573426573426573) internal successors, (1757), 715 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1757 transitions. [2021-06-05 22:28:11,506 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1757 transitions. Word has length 28 [2021-06-05 22:28:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1757 transitions. [2021-06-05 22:28:11,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1757 transitions. [2021-06-05 22:28:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:11,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:11,507 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:11,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable726 [2021-06-05 22:28:11,708 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:11,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1398256762, now seen corresponding path program 64 times [2021-06-05 22:28:11,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:11,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717830581] [2021-06-05 22:28:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717830581] [2021-06-05 22:28:11,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717830581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:11,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413596368] [2021-06-05 22:28:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:11,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:11,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:12,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413596368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:12,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:12,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:12,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137543232] [2021-06-05 22:28:12,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:12,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:12,003 INFO L87 Difference]: Start difference. First operand 716 states and 1757 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:12,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:12,273 INFO L93 Difference]: Finished difference Result 866 states and 2108 transitions. [2021-06-05 22:28:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:28:12,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:12,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:12,274 INFO L225 Difference]: With dead ends: 866 [2021-06-05 22:28:12,274 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 22:28:12,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:28:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 22:28:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 732. [2021-06-05 22:28:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.4582763337893296) internal successors, (1797), 731 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1797 transitions. [2021-06-05 22:28:12,281 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1797 transitions. Word has length 28 [2021-06-05 22:28:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:12,281 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 1797 transitions. [2021-06-05 22:28:12,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1797 transitions. [2021-06-05 22:28:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:12,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:12,282 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:12,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 22:28:12,482 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1585947062, now seen corresponding path program 65 times [2021-06-05 22:28:12,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:12,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516288033] [2021-06-05 22:28:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:12,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516288033] [2021-06-05 22:28:12,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516288033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:12,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122982508] [2021-06-05 22:28:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:12,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:12,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122982508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:12,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:12,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475580919] [2021-06-05 22:28:12,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:12,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:12,854 INFO L87 Difference]: Start difference. First operand 732 states and 1797 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:13,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:13,264 INFO L93 Difference]: Finished difference Result 930 states and 2264 transitions. [2021-06-05 22:28:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:13,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:13,267 INFO L225 Difference]: With dead ends: 930 [2021-06-05 22:28:13,267 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 22:28:13,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 22:28:13,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 740. [2021-06-05 22:28:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 22:28:13,274 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 22:28:13,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:13,274 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 22:28:13,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 22:28:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:13,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:13,275 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:13,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-06-05 22:28:13,475 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:13,475 INFO L82 PathProgramCache]: Analyzing trace with hash 120870266, now seen corresponding path program 66 times [2021-06-05 22:28:13,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:13,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124786192] [2021-06-05 22:28:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:13,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124786192] [2021-06-05 22:28:13,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124786192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:13,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941284614] [2021-06-05 22:28:13,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:13,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:28:13,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:13,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941284614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:13,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:13,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:13,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208451409] [2021-06-05 22:28:13,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:13,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:13,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:13,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:13,819 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:14,158 INFO L93 Difference]: Finished difference Result 866 states and 2112 transitions. [2021-06-05 22:28:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:14,159 INFO L225 Difference]: With dead ends: 866 [2021-06-05 22:28:14,159 INFO L226 Difference]: Without dead ends: 836 [2021-06-05 22:28:14,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:28:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-06-05 22:28:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 740. [2021-06-05 22:28:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 22:28:14,165 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 22:28:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:14,165 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 22:28:14,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 22:28:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:14,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:14,166 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:14,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:14,367 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:14,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1433877834, now seen corresponding path program 67 times [2021-06-05 22:28:14,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:14,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139909530] [2021-06-05 22:28:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:14,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139909530] [2021-06-05 22:28:14,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139909530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666956777] [2021-06-05 22:28:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:14,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:14,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666956777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:14,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:14,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:14,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789832476] [2021-06-05 22:28:14,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:14,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:14,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:14,701 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:15,089 INFO L93 Difference]: Finished difference Result 882 states and 2148 transitions. [2021-06-05 22:28:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:15,100 INFO L225 Difference]: With dead ends: 882 [2021-06-05 22:28:15,100 INFO L226 Difference]: Without dead ends: 844 [2021-06-05 22:28:15,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-06-05 22:28:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 740. [2021-06-05 22:28:15,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.45872801082544) internal successors, (1817), 739 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1817 transitions. [2021-06-05 22:28:15,107 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1817 transitions. Word has length 28 [2021-06-05 22:28:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:15,107 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1817 transitions. [2021-06-05 22:28:15,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1817 transitions. [2021-06-05 22:28:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:15,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:15,108 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:15,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:15,308 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:15,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1396012666, now seen corresponding path program 68 times [2021-06-05 22:28:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:15,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887547634] [2021-06-05 22:28:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:15,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:15,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887547634] [2021-06-05 22:28:15,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887547634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:15,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141276520] [2021-06-05 22:28:15,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:28:15,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:15,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:15,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141276520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:15,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:15,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569893599] [2021-06-05 22:28:15,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:15,714 INFO L87 Difference]: Start difference. First operand 740 states and 1817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:16,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:16,177 INFO L93 Difference]: Finished difference Result 890 states and 2172 transitions. [2021-06-05 22:28:16,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:16,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:16,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:16,178 INFO L225 Difference]: With dead ends: 890 [2021-06-05 22:28:16,179 INFO L226 Difference]: Without dead ends: 860 [2021-06-05 22:28:16,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=218, Invalid=904, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-06-05 22:28:16,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 748. [2021-06-05 22:28:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.459170013386881) internal successors, (1837), 747 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:16,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1837 transitions. [2021-06-05 22:28:16,185 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1837 transitions. Word has length 28 [2021-06-05 22:28:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:16,185 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 1837 transitions. [2021-06-05 22:28:16,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:16,186 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1837 transitions. [2021-06-05 22:28:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:16,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:16,186 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:16,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:16,387 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:16,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:16,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1639816266, now seen corresponding path program 69 times [2021-06-05 22:28:16,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:16,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080643233] [2021-06-05 22:28:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:16,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:16,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080643233] [2021-06-05 22:28:16,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080643233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:16,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015673492] [2021-06-05 22:28:16,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:16,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:28:16,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:16,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:16,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:16,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015673492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:16,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:16,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:16,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600536390] [2021-06-05 22:28:16,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:16,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:16,709 INFO L87 Difference]: Start difference. First operand 748 states and 1837 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:17,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:17,041 INFO L93 Difference]: Finished difference Result 882 states and 2152 transitions. [2021-06-05 22:28:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:17,042 INFO L225 Difference]: With dead ends: 882 [2021-06-05 22:28:17,042 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 22:28:17,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:28:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 22:28:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 756. [2021-06-05 22:28:17,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.4596026490066225) internal successors, (1857), 755 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1857 transitions. [2021-06-05 22:28:17,049 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1857 transitions. Word has length 28 [2021-06-05 22:28:17,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:17,049 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1857 transitions. [2021-06-05 22:28:17,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1857 transitions. [2021-06-05 22:28:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:17,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:17,050 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:17,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:17,250 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:17,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:17,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1452125966, now seen corresponding path program 70 times [2021-06-05 22:28:17,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:17,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759839256] [2021-06-05 22:28:17,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:17,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759839256] [2021-06-05 22:28:17,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759839256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:17,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783002742] [2021-06-05 22:28:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:28:17,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:17,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:17,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783002742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:17,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:17,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039085469] [2021-06-05 22:28:17,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:17,614 INFO L87 Difference]: Start difference. First operand 756 states and 1857 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:17,918 INFO L93 Difference]: Finished difference Result 834 states and 2032 transitions. [2021-06-05 22:28:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:28:17,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:17,919 INFO L225 Difference]: With dead ends: 834 [2021-06-05 22:28:17,919 INFO L226 Difference]: Without dead ends: 804 [2021-06-05 22:28:17,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:28:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-06-05 22:28:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 764. [2021-06-05 22:28:17,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.4600262123197902) internal successors, (1877), 763 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1877 transitions. [2021-06-05 22:28:17,926 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1877 transitions. Word has length 28 [2021-06-05 22:28:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:17,926 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 1877 transitions. [2021-06-05 22:28:17,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:17,926 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1877 transitions. [2021-06-05 22:28:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:17,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:17,927 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:18,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:18,129 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1978153802, now seen corresponding path program 71 times [2021-06-05 22:28:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:18,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541262780] [2021-06-05 22:28:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:18,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541262780] [2021-06-05 22:28:18,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541262780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:18,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224773196] [2021-06-05 22:28:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:18,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:18,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:18,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224773196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:18,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:18,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:18,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373089790] [2021-06-05 22:28:18,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:18,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:18,417 INFO L87 Difference]: Start difference. First operand 764 states and 1877 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:18,784 INFO L93 Difference]: Finished difference Result 938 states and 2292 transitions. [2021-06-05 22:28:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:18,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:18,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:18,786 INFO L225 Difference]: With dead ends: 938 [2021-06-05 22:28:18,786 INFO L226 Difference]: Without dead ends: 908 [2021-06-05 22:28:18,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:18,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-05 22:28:18,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 780. [2021-06-05 22:28:18,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-06-05 22:28:18,794 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-06-05 22:28:18,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:18,795 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-06-05 22:28:18,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-06-05 22:28:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:28:18,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:18,796 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:18,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:18,996 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash -59693770, now seen corresponding path program 72 times [2021-06-05 22:28:18,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:18,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481662498] [2021-06-05 22:28:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481662498] [2021-06-05 22:28:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481662498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121755252] [2021-06-05 22:28:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:19,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:28:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:28:19,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:19,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121755252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:19,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:19,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 22:28:19,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872072025] [2021-06-05 22:28:19,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:28:19,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:28:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:28:19,444 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:19,882 INFO L93 Difference]: Finished difference Result 890 states and 2176 transitions. [2021-06-05 22:28:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 28 [2021-06-05 22:28:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:19,883 INFO L225 Difference]: With dead ends: 890 [2021-06-05 22:28:19,883 INFO L226 Difference]: Without dead ends: 868 [2021-06-05 22:28:19,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 578.4ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-06-05 22:28:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 780. [2021-06-05 22:28:19,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 2.460847240051348) internal successors, (1917), 779 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1917 transitions. [2021-06-05 22:28:19,891 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1917 transitions. Word has length 28 [2021-06-05 22:28:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 1917 transitions. [2021-06-05 22:28:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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) [2021-06-05 22:28:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1917 transitions. [2021-06-05 22:28:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:19,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:19,892 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:20,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:20,093 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -798364280, now seen corresponding path program 73 times [2021-06-05 22:28:20,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:20,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641245341] [2021-06-05 22:28:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:20,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:20,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641245341] [2021-06-05 22:28:20,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641245341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:20,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342014619] [2021-06-05 22:28:20,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:20,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:20,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:20,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342014619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:20,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:20,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:20,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097564415] [2021-06-05 22:28:20,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:20,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:20,577 INFO L87 Difference]: Start difference. First operand 780 states and 1917 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:21,041 INFO L93 Difference]: Finished difference Result 1016 states and 2430 transitions. [2021-06-05 22:28:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:21,046 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 22:28:21,046 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 22:28:21,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 687.8ms TimeCoverageRelationStatistics Valid=313, Invalid=947, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:21,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 22:28:21,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 824. [2021-06-05 22:28:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 2.4702308626974485) internal successors, (2033), 823 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:21,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2033 transitions. [2021-06-05 22:28:21,053 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2033 transitions. Word has length 30 [2021-06-05 22:28:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:21,053 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2033 transitions. [2021-06-05 22:28:21,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:21,054 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2033 transitions. [2021-06-05 22:28:21,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:21,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:21,054 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:21,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 22:28:21,255 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:21,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:21,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1559894852, now seen corresponding path program 74 times [2021-06-05 22:28:21,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:21,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457391932] [2021-06-05 22:28:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:21,384 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:21,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:21,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457391932] [2021-06-05 22:28:21,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457391932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:21,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142965671] [2021-06-05 22:28:21,385 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 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 [2021-06-05 22:28:21,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:21,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:21,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142965671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:21,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:21,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:21,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001532077] [2021-06-05 22:28:21,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:21,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:21,754 INFO L87 Difference]: Start difference. First operand 824 states and 2033 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:22,200 INFO L93 Difference]: Finished difference Result 974 states and 2388 transitions. [2021-06-05 22:28:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:22,202 INFO L225 Difference]: With dead ends: 974 [2021-06-05 22:28:22,202 INFO L226 Difference]: Without dead ends: 944 [2021-06-05 22:28:22,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:28:22,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-05 22:28:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 840. [2021-06-05 22:28:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.470798569725864) internal successors, (2073), 839 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2073 transitions. [2021-06-05 22:28:22,211 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2073 transitions. Word has length 30 [2021-06-05 22:28:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:22,211 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2073 transitions. [2021-06-05 22:28:22,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2073 transitions. [2021-06-05 22:28:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:22,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:22,213 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:22,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:22,435 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1203309184, now seen corresponding path program 75 times [2021-06-05 22:28:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709772482] [2021-06-05 22:28:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:22,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:22,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709772482] [2021-06-05 22:28:22,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709772482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:22,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813447398] [2021-06-05 22:28:22,546 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 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 [2021-06-05 22:28:22,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:28:22,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:22,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813447398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:22,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:22,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:22,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070253156] [2021-06-05 22:28:22,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:22,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:22,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:22,907 INFO L87 Difference]: Start difference. First operand 840 states and 2073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:23,505 INFO L93 Difference]: Finished difference Result 1054 states and 2584 transitions. [2021-06-05 22:28:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:23,506 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 22:28:23,506 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 22:28:23,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:28:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 22:28:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 856. [2021-06-05 22:28:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:23,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-06-05 22:28:23,515 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-06-05 22:28:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:23,515 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-06-05 22:28:23,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-06-05 22:28:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:23,516 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:23,516 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:23,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:23,717 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1390999484, now seen corresponding path program 76 times [2021-06-05 22:28:23,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:23,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144902250] [2021-06-05 22:28:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:23,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:23,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144902250] [2021-06-05 22:28:23,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144902250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:23,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776523876] [2021-06-05 22:28:23,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:23,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:24,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776523876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:24,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:24,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:24,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149508083] [2021-06-05 22:28:24,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:24,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:24,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:24,223 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:24,662 INFO L93 Difference]: Finished difference Result 990 states and 2432 transitions. [2021-06-05 22:28:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:24,664 INFO L225 Difference]: With dead ends: 990 [2021-06-05 22:28:24,664 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 22:28:24,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 22:28:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 856. [2021-06-05 22:28:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.471345029239766) internal successors, (2113), 855 states have internal predecessors, (2113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2113 transitions. [2021-06-05 22:28:24,673 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2113 transitions. Word has length 30 [2021-06-05 22:28:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:24,673 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2113 transitions. [2021-06-05 22:28:24,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2113 transitions. [2021-06-05 22:28:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:24,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:24,675 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:24,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 22:28:24,875 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1816515712, now seen corresponding path program 77 times [2021-06-05 22:28:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:24,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461271675] [2021-06-05 22:28:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:24,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461271675] [2021-06-05 22:28:24,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461271675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:24,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532659620] [2021-06-05 22:28:24,998 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 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 [2021-06-05 22:28:25,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:28:25,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:25,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532659620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:25,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:25,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:25,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260738998] [2021-06-05 22:28:25,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:25,326 INFO L87 Difference]: Start difference. First operand 856 states and 2113 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:25,887 INFO L93 Difference]: Finished difference Result 1110 states and 2724 transitions. [2021-06-05 22:28:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:28:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:25,888 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 22:28:25,888 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 22:28:25,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 22:28:25,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 888. [2021-06-05 22:28:25,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.4723788049605413) internal successors, (2193), 887 states have internal predecessors, (2193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:25,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2193 transitions. [2021-06-05 22:28:25,896 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2193 transitions. Word has length 30 [2021-06-05 22:28:25,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:25,896 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 2193 transitions. [2021-06-05 22:28:25,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2193 transitions. [2021-06-05 22:28:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:25,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:25,897 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:26,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 22:28:26,098 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1628825412, now seen corresponding path program 78 times [2021-06-05 22:28:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678384618] [2021-06-05 22:28:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:26,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678384618] [2021-06-05 22:28:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678384618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501894992] [2021-06-05 22:28:26,220 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 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 [2021-06-05 22:28:26,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:28:26,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:26,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:26,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501894992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:26,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:26,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:26,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468488217] [2021-06-05 22:28:26,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:26,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:26,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:26,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:26,605 INFO L87 Difference]: Start difference. First operand 888 states and 2193 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:27,086 INFO L93 Difference]: Finished difference Result 1158 states and 2848 transitions. [2021-06-05 22:28:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:27,088 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 22:28:27,088 INFO L226 Difference]: Without dead ends: 1128 [2021-06-05 22:28:27,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-06-05 22:28:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 896. [2021-06-05 22:28:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.4726256983240225) internal successors, (2213), 895 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2213 transitions. [2021-06-05 22:28:27,100 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2213 transitions. Word has length 30 [2021-06-05 22:28:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:27,100 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2213 transitions. [2021-06-05 22:28:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2213 transitions. [2021-06-05 22:28:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:27,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:27,101 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:27,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 22:28:27,323 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash -236393216, now seen corresponding path program 79 times [2021-06-05 22:28:27,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:27,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221731639] [2021-06-05 22:28:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:27,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221731639] [2021-06-05 22:28:27,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221731639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178051218] [2021-06-05 22:28:27,597 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 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 [2021-06-05 22:28:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:27,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178051218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:27,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:27,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240453359] [2021-06-05 22:28:27,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:27,946 INFO L87 Difference]: Start difference. First operand 896 states and 2213 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:28,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:28,479 INFO L93 Difference]: Finished difference Result 1102 states and 2708 transitions. [2021-06-05 22:28:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:28,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:28,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:28,481 INFO L225 Difference]: With dead ends: 1102 [2021-06-05 22:28:28,481 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 22:28:28,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 22:28:28,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 928. [2021-06-05 22:28:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.4735706580366776) internal successors, (2293), 927 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:28,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2293 transitions. [2021-06-05 22:28:28,489 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2293 transitions. Word has length 30 [2021-06-05 22:28:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:28,489 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 2293 transitions. [2021-06-05 22:28:28,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2293 transitions. [2021-06-05 22:28:28,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:28,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:28,491 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:28,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable934 [2021-06-05 22:28:28,693 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:28,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1967162948, now seen corresponding path program 80 times [2021-06-05 22:28:28,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:28,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506566539] [2021-06-05 22:28:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:28,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:28,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506566539] [2021-06-05 22:28:28,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506566539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:28,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975197292] [2021-06-05 22:28:28,851 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 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 [2021-06-05 22:28:28,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:28,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:28,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:29,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975197292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:29,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:29,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:29,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329703012] [2021-06-05 22:28:29,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:29,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:29,219 INFO L87 Difference]: Start difference. First operand 928 states and 2293 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:29,865 INFO L93 Difference]: Finished difference Result 1174 states and 2888 transitions. [2021-06-05 22:28:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:28:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:29,866 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 22:28:29,866 INFO L226 Difference]: Without dead ends: 1144 [2021-06-05 22:28:29,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-06-05 22:28:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 944. [2021-06-05 22:28:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.4740190880169672) internal successors, (2333), 943 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2333 transitions. [2021-06-05 22:28:29,875 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2333 transitions. Word has length 30 [2021-06-05 22:28:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:29,876 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 2333 transitions. [2021-06-05 22:28:29,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2333 transitions. [2021-06-05 22:28:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:29,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:29,877 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:30,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:30,077 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1448111360, now seen corresponding path program 81 times [2021-06-05 22:28:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:30,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994669097] [2021-06-05 22:28:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:30,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:30,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994669097] [2021-06-05 22:28:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994669097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:30,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604260501] [2021-06-05 22:28:30,257 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 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 [2021-06-05 22:28:30,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:30,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:30,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604260501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:30,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:30,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:30,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277602068] [2021-06-05 22:28:30,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:30,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:30,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:30,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:30,603 INFO L87 Difference]: Start difference. First operand 944 states and 2333 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:31,209 INFO L93 Difference]: Finished difference Result 1284 states and 3123 transitions. [2021-06-05 22:28:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:31,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:31,211 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 22:28:31,211 INFO L226 Difference]: Without dead ends: 1254 [2021-06-05 22:28:31,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:31,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-05 22:28:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 992. [2021-06-05 22:28:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 2.4752774974772955) internal successors, (2453), 991 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 2453 transitions. [2021-06-05 22:28:31,220 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 2453 transitions. Word has length 30 [2021-06-05 22:28:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:31,220 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 2453 transitions. [2021-06-05 22:28:31,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 2453 transitions. [2021-06-05 22:28:31,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:31,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:31,221 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:31,421 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1109773824, now seen corresponding path program 82 times [2021-06-05 22:28:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817962064] [2021-06-05 22:28:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:31,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:31,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817962064] [2021-06-05 22:28:31,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817962064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:31,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011456004] [2021-06-05 22:28:31,584 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 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 [2021-06-05 22:28:31,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:31,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011456004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:31,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:31,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518767791] [2021-06-05 22:28:31,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:31,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:31,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:31,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:31,962 INFO L87 Difference]: Start difference. First operand 992 states and 2453 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:32,586 INFO L93 Difference]: Finished difference Result 1222 states and 3008 transitions. [2021-06-05 22:28:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:32,587 INFO L225 Difference]: With dead ends: 1222 [2021-06-05 22:28:32,587 INFO L226 Difference]: Without dead ends: 1192 [2021-06-05 22:28:32,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 874.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1007, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-06-05 22:28:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1016. [2021-06-05 22:28:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.475862068965517) internal successors, (2513), 1015 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2513 transitions. [2021-06-05 22:28:32,596 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2513 transitions. Word has length 30 [2021-06-05 22:28:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:32,596 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 2513 transitions. [2021-06-05 22:28:32,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2513 transitions. [2021-06-05 22:28:32,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:32,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:32,597 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:32,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable982,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:32,798 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:32,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:32,798 INFO L82 PathProgramCache]: Analyzing trace with hash -620995908, now seen corresponding path program 83 times [2021-06-05 22:28:32,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:32,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453294789] [2021-06-05 22:28:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:32,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453294789] [2021-06-05 22:28:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453294789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:32,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610625192] [2021-06-05 22:28:32,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:28:33,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:28:33,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:33,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610625192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:33,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:33,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:33,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862230447] [2021-06-05 22:28:33,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:33,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:33,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:33,361 INFO L87 Difference]: Start difference. First operand 1016 states and 2513 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:33,921 INFO L93 Difference]: Finished difference Result 1302 states and 3208 transitions. [2021-06-05 22:28:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:33,923 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 22:28:33,923 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 22:28:33,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 837.5ms TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:33,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 22:28:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1040. [2021-06-05 22:28:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1039 states have (on average 2.4764196342637153) internal successors, (2573), 1039 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 2573 transitions. [2021-06-05 22:28:33,932 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 2573 transitions. Word has length 30 [2021-06-05 22:28:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:33,932 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 2573 transitions. [2021-06-05 22:28:33,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 2573 transitions. [2021-06-05 22:28:33,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:33,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:33,933 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:34,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable999,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:34,134 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:34,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash -810930304, now seen corresponding path program 84 times [2021-06-05 22:28:34,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:34,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335035784] [2021-06-05 22:28:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:34,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335035784] [2021-06-05 22:28:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335035784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587608634] [2021-06-05 22:28:34,298 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 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 [2021-06-05 22:28:34,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:28:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587608634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:34,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:34,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:34,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913782616] [2021-06-05 22:28:34,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:34,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:34,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:34,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:34,653 INFO L87 Difference]: Start difference. First operand 1040 states and 2573 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:35,282 INFO L93 Difference]: Finished difference Result 1318 states and 3248 transitions. [2021-06-05 22:28:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:35,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:35,284 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 22:28:35,284 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 22:28:35,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:28:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 22:28:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1048. [2021-06-05 22:28:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.4765998089780323) internal successors, (2593), 1047 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2593 transitions. [2021-06-05 22:28:35,294 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2593 transitions. Word has length 30 [2021-06-05 22:28:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:35,294 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 2593 transitions. [2021-06-05 22:28:35,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2593 transitions. [2021-06-05 22:28:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:35,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:35,295 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:35,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 22:28:35,495 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2010082424, now seen corresponding path program 85 times [2021-06-05 22:28:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:35,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274590229] [2021-06-05 22:28:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:35,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:35,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274590229] [2021-06-05 22:28:35,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274590229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:35,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757270148] [2021-06-05 22:28:35,611 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 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 [2021-06-05 22:28:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:36,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757270148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:36,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:36,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:36,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720959096] [2021-06-05 22:28:36,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:36,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:36,074 INFO L87 Difference]: Start difference. First operand 1048 states and 2593 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:36,997 INFO L93 Difference]: Finished difference Result 1492 states and 3643 transitions. [2021-06-05 22:28:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:28:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:36,998 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 22:28:36,998 INFO L226 Difference]: Without dead ends: 1462 [2021-06-05 22:28:36,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1161.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:28:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-06-05 22:28:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1152. [2021-06-05 22:28:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.4787141615986097) internal successors, (2853), 1151 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2853 transitions. [2021-06-05 22:28:37,008 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2853 transitions. Word has length 30 [2021-06-05 22:28:37,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:37,008 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2853 transitions. [2021-06-05 22:28:37,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:37,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2853 transitions. [2021-06-05 22:28:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:37,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:37,010 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:37,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:37,210 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:37,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:37,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1947238460, now seen corresponding path program 86 times [2021-06-05 22:28:37,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:37,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344903255] [2021-06-05 22:28:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:37,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344903255] [2021-06-05 22:28:37,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344903255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844641540] [2021-06-05 22:28:37,308 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 22:28:37,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844641540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:37,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402205056] [2021-06-05 22:28:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:37,620 INFO L87 Difference]: Start difference. First operand 1152 states and 2853 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:38,096 INFO L93 Difference]: Finished difference Result 1286 states and 3168 transitions. [2021-06-05 22:28:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:28:38,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:38,097 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 22:28:38,097 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 22:28:38,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 542.7ms TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 22:28:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1168. [2021-06-05 22:28:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.479005998286204) internal successors, (2893), 1167 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2893 transitions. [2021-06-05 22:28:38,107 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2893 transitions. Word has length 30 [2021-06-05 22:28:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:38,107 INFO L482 AbstractCegarLoop]: Abstraction has 1168 states and 2893 transitions. [2021-06-05 22:28:38,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2893 transitions. [2021-06-05 22:28:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:38,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:38,109 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:38,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1050 [2021-06-05 22:28:38,309 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1965486592, now seen corresponding path program 87 times [2021-06-05 22:28:38,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:38,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012552605] [2021-06-05 22:28:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:38,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012552605] [2021-06-05 22:28:38,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012552605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341532382] [2021-06-05 22:28:38,482 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 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 [2021-06-05 22:28:38,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:38,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:38,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:28:38,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:38,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341532382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:38,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:38,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570074432] [2021-06-05 22:28:38,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:38,768 INFO L87 Difference]: Start difference. First operand 1168 states and 2893 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:39,230 INFO L93 Difference]: Finished difference Result 1468 states and 3583 transitions. [2021-06-05 22:28:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:39,230 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:39,231 INFO L225 Difference]: With dead ends: 1468 [2021-06-05 22:28:39,231 INFO L226 Difference]: Without dead ends: 1438 [2021-06-05 22:28:39,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-06-05 22:28:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1192. [2021-06-05 22:28:39,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.479429051217464) internal successors, (2953), 1191 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:39,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2953 transitions. [2021-06-05 22:28:39,241 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2953 transitions. Word has length 30 [2021-06-05 22:28:39,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:39,241 INFO L482 AbstractCegarLoop]: Abstraction has 1192 states and 2953 transitions. [2021-06-05 22:28:39,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:39,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2953 transitions. [2021-06-05 22:28:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:39,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:39,242 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:39,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:39,443 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:39,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:39,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1991143168, now seen corresponding path program 88 times [2021-06-05 22:28:39,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280328027] [2021-06-05 22:28:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:39,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:39,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280328027] [2021-06-05 22:28:39,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280328027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:39,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813354272] [2021-06-05 22:28:39,619 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 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 [2021-06-05 22:28:39,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:39,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813354272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:39,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:39,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:39,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000581771] [2021-06-05 22:28:39,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:39,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:39,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:39,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:39,967 INFO L87 Difference]: Start difference. First operand 1192 states and 2953 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:40,469 INFO L93 Difference]: Finished difference Result 1350 states and 3332 transitions. [2021-06-05 22:28:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:40,470 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 22:28:40,470 INFO L226 Difference]: Without dead ends: 1328 [2021-06-05 22:28:40,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 762.7ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-06-05 22:28:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1208. [2021-06-05 22:28:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-06-05 22:28:40,480 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-06-05 22:28:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:40,480 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-06-05 22:28:40,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-06-05 22:28:40,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:40,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:40,481 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:40,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 22:28:40,682 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash 260373436, now seen corresponding path program 89 times [2021-06-05 22:28:40,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:40,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524200027] [2021-06-05 22:28:40,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:40,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:40,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524200027] [2021-06-05 22:28:40,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524200027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:40,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946595250] [2021-06-05 22:28:40,821 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 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 [2021-06-05 22:28:40,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:28:40,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:40,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:41,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946595250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:41,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:41,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:41,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93807440] [2021-06-05 22:28:41,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:41,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:41,222 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:41,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:41,674 INFO L93 Difference]: Finished difference Result 1342 states and 3312 transitions. [2021-06-05 22:28:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:41,675 INFO L225 Difference]: With dead ends: 1342 [2021-06-05 22:28:41,675 INFO L226 Difference]: Without dead ends: 1320 [2021-06-05 22:28:41,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-06-05 22:28:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1200. [2021-06-05 22:28:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.479566305254379) internal successors, (2973), 1199 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2973 transitions. [2021-06-05 22:28:41,687 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2973 transitions. Word has length 30 [2021-06-05 22:28:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:41,687 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 2973 transitions. [2021-06-05 22:28:41,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:41,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2973 transitions. [2021-06-05 22:28:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:41,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:41,688 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 22:28:41,890 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1204703360, now seen corresponding path program 90 times [2021-06-05 22:28:41,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:41,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316613148] [2021-06-05 22:28:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:41,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:41,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316613148] [2021-06-05 22:28:41,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316613148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:41,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359514860] [2021-06-05 22:28:41,979 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 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 [2021-06-05 22:28:42,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:28:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:42,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359514860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:42,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:42,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:42,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922409171] [2021-06-05 22:28:42,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:42,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:42,287 INFO L87 Difference]: Start difference. First operand 1200 states and 2973 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:42,876 INFO L93 Difference]: Finished difference Result 1398 states and 3448 transitions. [2021-06-05 22:28:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:28:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:42,877 INFO L225 Difference]: With dead ends: 1398 [2021-06-05 22:28:42,877 INFO L226 Difference]: Without dead ends: 1368 [2021-06-05 22:28:42,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:28:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-06-05 22:28:42,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1208. [2021-06-05 22:28:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.47970173985087) internal successors, (2993), 1207 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 2993 transitions. [2021-06-05 22:28:42,893 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 2993 transitions. Word has length 30 [2021-06-05 22:28:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:42,893 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 2993 transitions. [2021-06-05 22:28:42,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:42,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 2993 transitions. [2021-06-05 22:28:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:42,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:42,894 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:43,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1108,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:43,095 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash 70439040, now seen corresponding path program 91 times [2021-06-05 22:28:43,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921905204] [2021-06-05 22:28:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921905204] [2021-06-05 22:28:43,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921905204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:43,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282801528] [2021-06-05 22:28:43,260 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 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 [2021-06-05 22:28:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282801528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:43,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:43,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:43,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109390830] [2021-06-05 22:28:43,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:43,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:43,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:43,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:43,584 INFO L87 Difference]: Start difference. First operand 1208 states and 2993 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:44,247 INFO L93 Difference]: Finished difference Result 1462 states and 3608 transitions. [2021-06-05 22:28:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:28:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:44,248 INFO L225 Difference]: With dead ends: 1462 [2021-06-05 22:28:44,248 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 22:28:44,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 827.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:28:44,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 22:28:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1240. [2021-06-05 22:28:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 2.480225988700565) internal successors, (3073), 1239 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 3073 transitions. [2021-06-05 22:28:44,259 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 3073 transitions. Word has length 30 [2021-06-05 22:28:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:44,259 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 3073 transitions. [2021-06-05 22:28:44,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 3073 transitions. [2021-06-05 22:28:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:44,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:44,260 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:44,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:44,460 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:44,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1329577404, now seen corresponding path program 92 times [2021-06-05 22:28:44,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:44,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362592230] [2021-06-05 22:28:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362592230] [2021-06-05 22:28:44,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362592230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217576697] [2021-06-05 22:28:44,585 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 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 [2021-06-05 22:28:44,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:44,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:44,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217576697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:44,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:44,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038829700] [2021-06-05 22:28:44,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:44,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:44,989 INFO L87 Difference]: Start difference. First operand 1240 states and 3073 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:45,517 INFO L93 Difference]: Finished difference Result 1834 states and 4484 transitions. [2021-06-05 22:28:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:45,519 INFO L225 Difference]: With dead ends: 1834 [2021-06-05 22:28:45,519 INFO L226 Difference]: Without dead ends: 1776 [2021-06-05 22:28:45,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 746.8ms TimeCoverageRelationStatistics Valid=325, Invalid=1081, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:28:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-06-05 22:28:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1360. [2021-06-05 22:28:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.487858719646799) internal successors, (3381), 1359 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3381 transitions. [2021-06-05 22:28:45,531 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3381 transitions. Word has length 30 [2021-06-05 22:28:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:45,531 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3381 transitions. [2021-06-05 22:28:45,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3381 transitions. [2021-06-05 22:28:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:45,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:45,532 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:45,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 22:28:45,733 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1619222852, now seen corresponding path program 93 times [2021-06-05 22:28:45,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626369517] [2021-06-05 22:28:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626369517] [2021-06-05 22:28:45,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626369517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:45,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208933141] [2021-06-05 22:28:45,891 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 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 [2021-06-05 22:28:45,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:45,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:45,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208933141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:46,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:46,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:46,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580940317] [2021-06-05 22:28:46,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:46,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:46,221 INFO L87 Difference]: Start difference. First operand 1360 states and 3381 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,621 INFO L93 Difference]: Finished difference Result 1574 states and 3896 transitions. [2021-06-05 22:28:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:28:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,623 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 22:28:46,623 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 22:28:46,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 661.1ms TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:28:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 22:28:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1376. [2021-06-05 22:28:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.488) internal successors, (3421), 1375 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 3421 transitions. [2021-06-05 22:28:46,644 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 3421 transitions. Word has length 30 [2021-06-05 22:28:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,644 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 3421 transitions. [2021-06-05 22:28:46,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 3421 transitions. [2021-06-05 22:28:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:46,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,645 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1156 [2021-06-05 22:28:46,853 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1975808520, now seen corresponding path program 94 times [2021-06-05 22:28:46,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426689327] [2021-06-05 22:28:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426689327] [2021-06-05 22:28:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426689327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899871129] [2021-06-05 22:28:46,959 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 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 [2021-06-05 22:28:46,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:46,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899871129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:47,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:47,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:47,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352058269] [2021-06-05 22:28:47,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:47,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:47,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:47,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:47,301 INFO L87 Difference]: Start difference. First operand 1376 states and 3421 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:47,879 INFO L93 Difference]: Finished difference Result 1646 states and 4072 transitions. [2021-06-05 22:28:47,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:47,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:47,881 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 22:28:47,881 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 22:28:47,881 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 733.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:28:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 22:28:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1384. [2021-06-05 22:28:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.488069414316703) internal successors, (3441), 1383 states have internal predecessors, (3441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3441 transitions. [2021-06-05 22:28:47,892 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3441 transitions. Word has length 30 [2021-06-05 22:28:47,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:47,892 INFO L482 AbstractCegarLoop]: Abstraction has 1384 states and 3441 transitions. [2021-06-05 22:28:47,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3441 transitions. [2021-06-05 22:28:47,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:47,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:47,894 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:48,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 22:28:48,095 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:48,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:48,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1217793912, now seen corresponding path program 95 times [2021-06-05 22:28:48,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:48,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947230789] [2021-06-05 22:28:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:48,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:48,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947230789] [2021-06-05 22:28:48,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947230789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:48,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957265169] [2021-06-05 22:28:48,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:28:48,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:28:48,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:48,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:48,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957265169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:48,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:48,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:48,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143573804] [2021-06-05 22:28:48,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:48,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:48,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:48,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:48,567 INFO L87 Difference]: Start difference. First operand 1384 states and 3441 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:49,010 INFO L93 Difference]: Finished difference Result 1630 states and 4032 transitions. [2021-06-05 22:28:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:28:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:49,011 INFO L225 Difference]: With dead ends: 1630 [2021-06-05 22:28:49,011 INFO L226 Difference]: Without dead ends: 1592 [2021-06-05 22:28:49,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 645.7ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:28:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2021-06-05 22:28:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1392. [2021-06-05 22:28:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.488138030194105) internal successors, (3461), 1391 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 3461 transitions. [2021-06-05 22:28:49,023 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 3461 transitions. Word has length 30 [2021-06-05 22:28:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:49,023 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 3461 transitions. [2021-06-05 22:28:49,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 3461 transitions. [2021-06-05 22:28:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:49,024 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:49,024 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:49,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:49,229 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash 879456376, now seen corresponding path program 96 times [2021-06-05 22:28:49,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:49,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501769684] [2021-06-05 22:28:49,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:49,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501769684] [2021-06-05 22:28:49,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501769684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298040575] [2021-06-05 22:28:49,406 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 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 [2021-06-05 22:28:49,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:28:49,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:49,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:49,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298040575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:49,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:49,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263442052] [2021-06-05 22:28:49,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:49,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:49,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:49,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:49,719 INFO L87 Difference]: Start difference. First operand 1392 states and 3461 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:50,137 INFO L93 Difference]: Finished difference Result 1664 states and 4071 transitions. [2021-06-05 22:28:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:28:50,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:50,139 INFO L225 Difference]: With dead ends: 1664 [2021-06-05 22:28:50,139 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 22:28:50,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:50,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 22:28:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1424. [2021-06-05 22:28:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.488404778636683) internal successors, (3541), 1423 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3541 transitions. [2021-06-05 22:28:50,152 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3541 transitions. Word has length 30 [2021-06-05 22:28:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:50,152 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 3541 transitions. [2021-06-05 22:28:50,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3541 transitions. [2021-06-05 22:28:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:50,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:50,153 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:50,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1206 [2021-06-05 22:28:50,353 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -851313356, now seen corresponding path program 97 times [2021-06-05 22:28:50,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:50,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821843469] [2021-06-05 22:28:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:50,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:50,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821843469] [2021-06-05 22:28:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821843469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:50,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363088207] [2021-06-05 22:28:50,507 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 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 [2021-06-05 22:28:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:50,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:50,861 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:50,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363088207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:50,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:50,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:50,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179178363] [2021-06-05 22:28:50,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:50,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:50,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:50,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:50,862 INFO L87 Difference]: Start difference. First operand 1424 states and 3541 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:51,434 INFO L93 Difference]: Finished difference Result 1774 states and 4360 transitions. [2021-06-05 22:28:51,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:51,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:51,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:51,435 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 22:28:51,436 INFO L226 Difference]: Without dead ends: 1744 [2021-06-05 22:28:51,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 759.0ms TimeCoverageRelationStatistics Valid=305, Invalid=1027, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-06-05 22:28:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1432. [2021-06-05 22:28:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 2.488469601677149) internal successors, (3561), 1431 states have internal predecessors, (3561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 3561 transitions. [2021-06-05 22:28:51,447 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 3561 transitions. Word has length 30 [2021-06-05 22:28:51,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:51,448 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 3561 transitions. [2021-06-05 22:28:51,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 3561 transitions. [2021-06-05 22:28:51,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:51,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:51,449 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:51,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1218 [2021-06-05 22:28:51,649 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1486093244, now seen corresponding path program 98 times [2021-06-05 22:28:51,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:51,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559167341] [2021-06-05 22:28:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:51,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:51,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559167341] [2021-06-05 22:28:51,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559167341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:51,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305892678] [2021-06-05 22:28:51,788 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 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 [2021-06-05 22:28:51,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:51,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:52,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305892678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:52,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:52,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:52,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30188944] [2021-06-05 22:28:52,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:52,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:52,112 INFO L87 Difference]: Start difference. First operand 1432 states and 3561 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:52,593 INFO L93 Difference]: Finished difference Result 1646 states and 4076 transitions. [2021-06-05 22:28:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:52,593 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:52,595 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 22:28:52,595 INFO L226 Difference]: Without dead ends: 1616 [2021-06-05 22:28:52,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 686.4ms TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-05 22:28:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1464. [2021-06-05 22:28:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-06-05 22:28:52,606 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-06-05 22:28:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:52,606 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-06-05 22:28:52,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-06-05 22:28:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:52,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:52,607 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1235 [2021-06-05 22:28:52,808 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:52,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1416441856, now seen corresponding path program 99 times [2021-06-05 22:28:52,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:52,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876805585] [2021-06-05 22:28:52,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876805585] [2021-06-05 22:28:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876805585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007643549] [2021-06-05 22:28:52,920 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 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 [2021-06-05 22:28:52,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:28:52,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:53,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007643549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:53,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:53,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:53,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029124911] [2021-06-05 22:28:53,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:53,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:53,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:53,277 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:53,650 INFO L93 Difference]: Finished difference Result 1686 states and 4176 transitions. [2021-06-05 22:28:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:28:53,650 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:53,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:53,652 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 22:28:53,652 INFO L226 Difference]: Without dead ends: 1656 [2021-06-05 22:28:53,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:28:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-06-05 22:28:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1464. [2021-06-05 22:28:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 2.488721804511278) internal successors, (3641), 1463 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 3641 transitions. [2021-06-05 22:28:53,663 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 3641 transitions. Word has length 30 [2021-06-05 22:28:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:53,663 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 3641 transitions. [2021-06-05 22:28:53,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 3641 transitions. [2021-06-05 22:28:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:53,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:53,664 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:53,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:53,865 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1872069188, now seen corresponding path program 100 times [2021-06-05 22:28:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:53,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65033669] [2021-06-05 22:28:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:54,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:54,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65033669] [2021-06-05 22:28:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65033669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:54,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745861972] [2021-06-05 22:28:54,036 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 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 [2021-06-05 22:28:54,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:54,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745861972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:54,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:54,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177242748] [2021-06-05 22:28:54,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:54,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:54,437 INFO L87 Difference]: Start difference. First operand 1464 states and 3641 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:54,970 INFO L93 Difference]: Finished difference Result 1678 states and 4156 transitions. [2021-06-05 22:28:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:28:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:54,972 INFO L225 Difference]: With dead ends: 1678 [2021-06-05 22:28:54,972 INFO L226 Difference]: Without dead ends: 1648 [2021-06-05 22:28:54,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2021-06-05 22:28:54,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1472. [2021-06-05 22:28:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.488783140720598) internal successors, (3661), 1471 states have internal predecessors, (3661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 3661 transitions. [2021-06-05 22:28:54,984 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 3661 transitions. Word has length 30 [2021-06-05 22:28:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:54,984 INFO L482 AbstractCegarLoop]: Abstraction has 1472 states and 3661 transitions. [2021-06-05 22:28:54,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 3661 transitions. [2021-06-05 22:28:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:54,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:54,986 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-06-05 22:28:55,189 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 848281916, now seen corresponding path program 101 times [2021-06-05 22:28:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067135886] [2021-06-05 22:28:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:55,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:55,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067135886] [2021-06-05 22:28:55,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067135886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:55,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750627672] [2021-06-05 22:28:55,336 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 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 [2021-06-05 22:28:55,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:28:55,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:55,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750627672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:55,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:55,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:55,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344001607] [2021-06-05 22:28:55,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:55,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:55,694 INFO L87 Difference]: Start difference. First operand 1472 states and 3661 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:56,262 INFO L93 Difference]: Finished difference Result 1844 states and 4531 transitions. [2021-06-05 22:28:56,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:56,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:56,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:56,264 INFO L225 Difference]: With dead ends: 1844 [2021-06-05 22:28:56,264 INFO L226 Difference]: Without dead ends: 1814 [2021-06-05 22:28:56,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:28:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-06-05 22:28:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1496. [2021-06-05 22:28:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.488963210702341) internal successors, (3721), 1495 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3721 transitions. [2021-06-05 22:28:56,279 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3721 transitions. Word has length 30 [2021-06-05 22:28:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:56,279 INFO L482 AbstractCegarLoop]: Abstraction has 1496 states and 3721 transitions. [2021-06-05 22:28:56,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3721 transitions. [2021-06-05 22:28:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:56,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:56,280 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:56,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:56,480 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 204964284, now seen corresponding path program 102 times [2021-06-05 22:28:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83556451] [2021-06-05 22:28:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:56,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83556451] [2021-06-05 22:28:56,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83556451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362929170] [2021-06-05 22:28:56,578 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 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 [2021-06-05 22:28:56,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:28:56,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:56,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:56,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362929170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:56,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:56,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235285351] [2021-06-05 22:28:56,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:56,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:56,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:56,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:56,835 INFO L87 Difference]: Start difference. First operand 1496 states and 3721 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:57,290 INFO L93 Difference]: Finished difference Result 1782 states and 4372 transitions. [2021-06-05 22:28:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:28:57,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:57,291 INFO L225 Difference]: With dead ends: 1782 [2021-06-05 22:28:57,291 INFO L226 Difference]: Without dead ends: 1744 [2021-06-05 22:28:57,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 515.5ms TimeCoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:28:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2021-06-05 22:28:57,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 1536. [2021-06-05 22:28:57,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 22:28:57,304 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 22:28:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:57,304 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 22:28:57,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 22:28:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:57,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:57,305 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:57,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-05 22:28:57,506 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:57,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1072422212, now seen corresponding path program 103 times [2021-06-05 22:28:57,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:57,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690150820] [2021-06-05 22:28:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690150820] [2021-06-05 22:28:57,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690150820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2549875] [2021-06-05 22:28:57,624 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 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 [2021-06-05 22:28:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:57,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2549875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:57,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:57,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463026691] [2021-06-05 22:28:57,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:57,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:57,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:57,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:57,923 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:58,467 INFO L93 Difference]: Finished difference Result 1670 states and 4136 transitions. [2021-06-05 22:28:58,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:28:58,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:58,470 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 22:28:58,470 INFO L226 Difference]: Without dead ends: 1640 [2021-06-05 22:28:58,470 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:28:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-06-05 22:28:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1536. [2021-06-05 22:28:58,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 22:28:58,482 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 22:28:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:58,482 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 22:28:58,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 22:28:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:58,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:58,484 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:58,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-05 22:28:58,684 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:58,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:58,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176184, now seen corresponding path program 104 times [2021-06-05 22:28:58,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:58,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117638089] [2021-06-05 22:28:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:58,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:58,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117638089] [2021-06-05 22:28:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117638089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:58,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601956643] [2021-06-05 22:28:58,788 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 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 [2021-06-05 22:28:58,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:28:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:59,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601956643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:59,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:59,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:28:59,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120949785] [2021-06-05 22:28:59,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:28:59,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:28:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:28:59,156 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:59,691 INFO L93 Difference]: Finished difference Result 1862 states and 4616 transitions. [2021-06-05 22:28:59,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:28:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:28:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:59,693 INFO L225 Difference]: With dead ends: 1862 [2021-06-05 22:28:59,693 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 22:28:59,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:28:59,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 22:28:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1528. [2021-06-05 22:28:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 2.4891944990176817) internal successors, (3801), 1527 states have internal predecessors, (3801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 3801 transitions. [2021-06-05 22:28:59,705 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 3801 transitions. Word has length 30 [2021-06-05 22:28:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:59,706 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 3801 transitions. [2021-06-05 22:28:59,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 3801 transitions. [2021-06-05 22:28:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:28:59,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:59,707 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:59,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1339 [2021-06-05 22:28:59,908 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash -207056904, now seen corresponding path program 105 times [2021-06-05 22:28:59,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:59,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997621694] [2021-06-05 22:28:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:00,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997621694] [2021-06-05 22:29:00,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997621694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:00,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856208660] [2021-06-05 22:29:00,033 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 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 [2021-06-05 22:29:00,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:29:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:00,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:00,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856208660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:00,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:00,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:00,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848089781] [2021-06-05 22:29:00,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:00,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:00,367 INFO L87 Difference]: Start difference. First operand 1528 states and 3801 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:00,990 INFO L93 Difference]: Finished difference Result 1806 states and 4476 transitions. [2021-06-05 22:29:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:00,991 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 22:29:00,991 INFO L226 Difference]: Without dead ends: 1776 [2021-06-05 22:29:00,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:00,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-06-05 22:29:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1536. [2021-06-05 22:29:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.4892508143322476) internal successors, (3821), 1535 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3821 transitions. [2021-06-05 22:29:01,003 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3821 transitions. Word has length 30 [2021-06-05 22:29:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:01,004 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 3821 transitions. [2021-06-05 22:29:01,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3821 transitions. [2021-06-05 22:29:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:01,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:01,005 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:01,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-06-05 22:29:01,206 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:01,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:01,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1255775796, now seen corresponding path program 106 times [2021-06-05 22:29:01,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:01,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814230045] [2021-06-05 22:29:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:01,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:01,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814230045] [2021-06-05 22:29:01,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814230045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094009754] [2021-06-05 22:29:01,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 22:29:01,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:01,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:01,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:01,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094009754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:01,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:01,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713662234] [2021-06-05 22:29:01,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:01,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:01,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:01,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:01,743 INFO L87 Difference]: Start difference. First operand 1536 states and 3821 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:02,254 INFO L93 Difference]: Finished difference Result 1942 states and 4776 transitions. [2021-06-05 22:29:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:02,255 INFO L225 Difference]: With dead ends: 1942 [2021-06-05 22:29:02,255 INFO L226 Difference]: Without dead ends: 1912 [2021-06-05 22:29:02,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 710.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1055, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:29:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-05 22:29:02,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1560. [2021-06-05 22:29:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1559 states have (on average 2.4894162924951893) internal successors, (3881), 1559 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 3881 transitions. [2021-06-05 22:29:02,269 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 3881 transitions. Word has length 30 [2021-06-05 22:29:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:02,269 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 3881 transitions. [2021-06-05 22:29:02,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 3881 transitions. [2021-06-05 22:29:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:02,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:02,270 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:02,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:02,471 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1646759304, now seen corresponding path program 107 times [2021-06-05 22:29:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:02,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561285689] [2021-06-05 22:29:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:02,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:02,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561285689] [2021-06-05 22:29:02,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561285689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222667703] [2021-06-05 22:29:02,598 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 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 [2021-06-05 22:29:02,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:29:02,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:02,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:02,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222667703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:02,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:02,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:02,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706558330] [2021-06-05 22:29:02,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:02,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:02,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:02,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:02,947 INFO L87 Difference]: Start difference. First operand 1560 states and 3881 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:03,370 INFO L93 Difference]: Finished difference Result 1782 states and 4420 transitions. [2021-06-05 22:29:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:03,372 INFO L225 Difference]: With dead ends: 1782 [2021-06-05 22:29:03,372 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 22:29:03,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:29:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 22:29:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1576. [2021-06-05 22:29:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-06-05 22:29:03,390 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-06-05 22:29:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:03,390 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-06-05 22:29:03,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-06-05 22:29:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:03,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:03,391 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:03,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:03,613 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:03,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:03,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1862466628, now seen corresponding path program 108 times [2021-06-05 22:29:03,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:03,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838317833] [2021-06-05 22:29:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:03,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838317833] [2021-06-05 22:29:03,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838317833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205548067] [2021-06-05 22:29:03,708 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 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 [2021-06-05 22:29:03,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:29:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205548067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:03,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:03,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:03,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166903375] [2021-06-05 22:29:03,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:03,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:03,971 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:04,286 INFO L93 Difference]: Finished difference Result 1702 states and 4216 transitions. [2021-06-05 22:29:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:04,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:04,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:04,287 INFO L225 Difference]: With dead ends: 1702 [2021-06-05 22:29:04,287 INFO L226 Difference]: Without dead ends: 1672 [2021-06-05 22:29:04,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:29:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-05 22:29:04,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1576. [2021-06-05 22:29:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 2.4895238095238095) internal successors, (3921), 1575 states have internal predecessors, (3921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 3921 transitions. [2021-06-05 22:29:04,300 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 3921 transitions. Word has length 30 [2021-06-05 22:29:04,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:04,301 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 3921 transitions. [2021-06-05 22:29:04,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 3921 transitions. [2021-06-05 22:29:04,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:04,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:04,302 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1416 [2021-06-05 22:29:04,525 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:04,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1880714760, now seen corresponding path program 109 times [2021-06-05 22:29:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086403896] [2021-06-05 22:29:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:04,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086403896] [2021-06-05 22:29:04,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086403896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510403100] [2021-06-05 22:29:04,643 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 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 [2021-06-05 22:29:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:04,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:04,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510403100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:04,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:04,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540026302] [2021-06-05 22:29:04,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:04,941 INFO L87 Difference]: Start difference. First operand 1576 states and 3921 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:05,494 INFO L93 Difference]: Finished difference Result 1798 states and 4456 transitions. [2021-06-05 22:29:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:05,496 INFO L225 Difference]: With dead ends: 1798 [2021-06-05 22:29:05,496 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 22:29:05,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 22:29:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1584. [2021-06-05 22:29:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 2.4895767530006316) internal successors, (3941), 1583 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 3941 transitions. [2021-06-05 22:29:05,509 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 3941 transitions. Word has length 30 [2021-06-05 22:29:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:05,510 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 3941 transitions. [2021-06-05 22:29:05,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 3941 transitions. [2021-06-05 22:29:05,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:05,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:05,511 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:05,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1429,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:05,712 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:05,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:05,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024460, now seen corresponding path program 110 times [2021-06-05 22:29:05,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:05,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319819994] [2021-06-05 22:29:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:05,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:05,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319819994] [2021-06-05 22:29:05,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319819994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:05,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530895141] [2021-06-05 22:29:05,803 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 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 [2021-06-05 22:29:05,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:05,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:06,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530895141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:06,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:06,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:06,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643391504] [2021-06-05 22:29:06,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:06,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:06,167 INFO L87 Difference]: Start difference. First operand 1584 states and 3941 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:06,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:06,810 INFO L93 Difference]: Finished difference Result 1894 states and 4656 transitions. [2021-06-05 22:29:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:06,812 INFO L225 Difference]: With dead ends: 1894 [2021-06-05 22:29:06,812 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 22:29:06,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:29:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 22:29:06,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1600. [2021-06-05 22:29:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4896810506566602) internal successors, (3981), 1599 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3981 transitions. [2021-06-05 22:29:06,827 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3981 transitions. Word has length 30 [2021-06-05 22:29:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:06,827 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 3981 transitions. [2021-06-05 22:29:06,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:06,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3981 transitions. [2021-06-05 22:29:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:06,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:06,828 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:07,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1442 [2021-06-05 22:29:07,029 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -300592264, now seen corresponding path program 111 times [2021-06-05 22:29:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:07,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475901904] [2021-06-05 22:29:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:07,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475901904] [2021-06-05 22:29:07,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475901904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:07,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174718752] [2021-06-05 22:29:07,131 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 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 [2021-06-05 22:29:07,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:29:07,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:07,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174718752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:07,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:07,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:07,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090396762] [2021-06-05 22:29:07,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:07,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:07,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:07,464 INFO L87 Difference]: Start difference. First operand 1600 states and 3981 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:07,933 INFO L93 Difference]: Finished difference Result 2008 states and 4927 transitions. [2021-06-05 22:29:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:07,935 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 22:29:07,935 INFO L226 Difference]: Without dead ends: 1958 [2021-06-05 22:29:07,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:29:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-06-05 22:29:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1640. [2021-06-05 22:29:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 2.48993288590604) internal successors, (4081), 1639 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 4081 transitions. [2021-06-05 22:29:07,962 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 4081 transitions. Word has length 30 [2021-06-05 22:29:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:07,963 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 4081 transitions. [2021-06-05 22:29:07,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 4081 transitions. [2021-06-05 22:29:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:07,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:07,965 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:08,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 22:29:08,183 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2031361996, now seen corresponding path program 112 times [2021-06-05 22:29:08,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:08,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566331593] [2021-06-05 22:29:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:08,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566331593] [2021-06-05 22:29:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566331593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832482048] [2021-06-05 22:29:08,278 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:08,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832482048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:08,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67445142] [2021-06-05 22:29:08,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:08,607 INFO L87 Difference]: Start difference. First operand 1640 states and 4081 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:09,109 INFO L93 Difference]: Finished difference Result 2030 states and 5000 transitions. [2021-06-05 22:29:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:09,113 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:09,115 INFO L225 Difference]: With dead ends: 2030 [2021-06-05 22:29:09,115 INFO L226 Difference]: Without dead ends: 2000 [2021-06-05 22:29:09,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=276, Invalid=984, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:29:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-06-05 22:29:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1648. [2021-06-05 22:29:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 2.4899817850637525) internal successors, (4101), 1647 states have internal predecessors, (4101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 4101 transitions. [2021-06-05 22:29:09,130 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 4101 transitions. Word has length 30 [2021-06-05 22:29:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:09,130 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 4101 transitions. [2021-06-05 22:29:09,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 4101 transitions. [2021-06-05 22:29:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:09,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:09,131 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:09,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-06-05 22:29:09,332 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -756219596, now seen corresponding path program 113 times [2021-06-05 22:29:09,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:09,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118563842] [2021-06-05 22:29:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:09,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:09,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118563842] [2021-06-05 22:29:09,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118563842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:09,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457034409] [2021-06-05 22:29:09,436 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:09,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:29:09,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:09,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:29:09,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:09,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457034409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:09,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:09,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073158410] [2021-06-05 22:29:09,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:09,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:09,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:09,772 INFO L87 Difference]: Start difference. First operand 1648 states and 4101 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:10,331 INFO L93 Difference]: Finished difference Result 2030 states and 4996 transitions. [2021-06-05 22:29:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:29:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:10,334 INFO L225 Difference]: With dead ends: 2030 [2021-06-05 22:29:10,334 INFO L226 Difference]: Without dead ends: 2000 [2021-06-05 22:29:10,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 743.2ms TimeCoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2000 states. [2021-06-05 22:29:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2000 to 1672. [2021-06-05 22:29:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 2.490125673249551) internal successors, (4161), 1671 states have internal predecessors, (4161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 4161 transitions. [2021-06-05 22:29:10,348 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 4161 transitions. Word has length 30 [2021-06-05 22:29:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:10,348 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 4161 transitions. [2021-06-05 22:29:10,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 4161 transitions. [2021-06-05 22:29:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:29:10,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:10,350 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:10,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1495 [2021-06-05 22:29:10,550 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:10,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1490022136, now seen corresponding path program 4 times [2021-06-05 22:29:10,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:10,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875350157] [2021-06-05 22:29:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:10,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875350157] [2021-06-05 22:29:10,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875350157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:10,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569381657] [2021-06-05 22:29:10,902 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:10,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:10,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 22:29:10,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:11,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569381657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:11,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:11,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 22:29:11,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784962701] [2021-06-05 22:29:11,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:29:11,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:11,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:29:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:11,205 INFO L87 Difference]: Start difference. First operand 1672 states and 4161 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:11,665 INFO L93 Difference]: Finished difference Result 1774 states and 4388 transitions. [2021-06-05 22:29:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:11,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:29:11,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:11,667 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 22:29:11,667 INFO L226 Difference]: Without dead ends: 1728 [2021-06-05 22:29:11,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 677.9ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:29:11,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-06-05 22:29:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1696. [2021-06-05 22:29:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.4902654867256637) internal successors, (4221), 1695 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4221 transitions. [2021-06-05 22:29:11,688 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4221 transitions. Word has length 30 [2021-06-05 22:29:11,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:11,688 INFO L482 AbstractCegarLoop]: Abstraction has 1696 states and 4221 transitions. [2021-06-05 22:29:11,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4221 transitions. [2021-06-05 22:29:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:11,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:11,689 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:11,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-05 22:29:11,890 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:11,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1989405762, now seen corresponding path program 114 times [2021-06-05 22:29:11,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:11,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260116666] [2021-06-05 22:29:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:12,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:12,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260116666] [2021-06-05 22:29:12,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260116666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836178706] [2021-06-05 22:29:12,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:12,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:29:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:12,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836178706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:12,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296439491] [2021-06-05 22:29:12,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:12,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:12,361 INFO L87 Difference]: Start difference. First operand 1696 states and 4221 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:12,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:12,883 INFO L93 Difference]: Finished difference Result 1846 states and 4580 transitions. [2021-06-05 22:29:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:12,885 INFO L225 Difference]: With dead ends: 1846 [2021-06-05 22:29:12,885 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 22:29:12,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 22:29:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1704. [2021-06-05 22:29:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-06-05 22:29:12,899 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-06-05 22:29:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:12,899 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-06-05 22:29:12,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-06-05 22:29:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:12,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:12,901 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:13,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:13,101 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:13,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1783467330, now seen corresponding path program 115 times [2021-06-05 22:29:13,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:13,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279265297] [2021-06-05 22:29:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:13,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279265297] [2021-06-05 22:29:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279265297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761337222] [2021-06-05 22:29:13,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:13,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:13,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761337222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:13,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:13,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716683594] [2021-06-05 22:29:13,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:13,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:13,723 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:14,503 INFO L93 Difference]: Finished difference Result 1926 states and 4776 transitions. [2021-06-05 22:29:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:14,505 INFO L225 Difference]: With dead ends: 1926 [2021-06-05 22:29:14,505 INFO L226 Difference]: Without dead ends: 1896 [2021-06-05 22:29:14,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1004.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:29:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-05 22:29:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1704. [2021-06-05 22:29:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1703 states have (on average 2.490311215502055) internal successors, (4241), 1703 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 4241 transitions. [2021-06-05 22:29:14,520 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 4241 transitions. Word has length 32 [2021-06-05 22:29:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:14,520 INFO L482 AbstractCegarLoop]: Abstraction has 1704 states and 4241 transitions. [2021-06-05 22:29:14,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 4241 transitions. [2021-06-05 22:29:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:14,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:14,522 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-06-05 22:29:14,737 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash 700350598, now seen corresponding path program 116 times [2021-06-05 22:29:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991419749] [2021-06-05 22:29:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:15,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991419749] [2021-06-05 22:29:15,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991419749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:15,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316031683] [2021-06-05 22:29:15,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:15,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:15,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:15,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:15,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316031683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:15,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:15,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:15,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39573303] [2021-06-05 22:29:15,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:15,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:15,467 INFO L87 Difference]: Start difference. First operand 1704 states and 4241 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:16,048 INFO L93 Difference]: Finished difference Result 1870 states and 4636 transitions. [2021-06-05 22:29:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:16,050 INFO L225 Difference]: With dead ends: 1870 [2021-06-05 22:29:16,050 INFO L226 Difference]: Without dead ends: 1840 [2021-06-05 22:29:16,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 971.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:29:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-06-05 22:29:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1720. [2021-06-05 22:29:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 2.4904013961605584) internal successors, (4281), 1719 states have internal predecessors, (4281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 4281 transitions. [2021-06-05 22:29:16,069 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 4281 transitions. Word has length 32 [2021-06-05 22:29:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:16,069 INFO L482 AbstractCegarLoop]: Abstraction has 1720 states and 4281 transitions. [2021-06-05 22:29:16,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:16,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 4281 transitions. [2021-06-05 22:29:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:16,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:16,072 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:16,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1550 [2021-06-05 22:29:16,291 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:16,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471366, now seen corresponding path program 117 times [2021-06-05 22:29:16,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:16,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106200867] [2021-06-05 22:29:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:16,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106200867] [2021-06-05 22:29:16,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106200867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:16,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994262599] [2021-06-05 22:29:16,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:16,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:29:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:16,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:16,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:17,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994262599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:17,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:17,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:17,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714675917] [2021-06-05 22:29:17,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:17,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:17,053 INFO L87 Difference]: Start difference. First operand 1720 states and 4281 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:17,684 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-06-05 22:29:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:17,686 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 22:29:17,686 INFO L226 Difference]: Without dead ends: 1984 [2021-06-05 22:29:17,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 812.1ms TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:29:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-05 22:29:17,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1744. [2021-06-05 22:29:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 2.4905335628227196) internal successors, (4341), 1743 states have internal predecessors, (4341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 4341 transitions. [2021-06-05 22:29:17,703 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 4341 transitions. Word has length 32 [2021-06-05 22:29:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:17,704 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 4341 transitions. [2021-06-05 22:29:17,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 4341 transitions. [2021-06-05 22:29:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:17,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:17,705 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:17,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1565 [2021-06-05 22:29:17,907 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1236357566, now seen corresponding path program 118 times [2021-06-05 22:29:17,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:17,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127276304] [2021-06-05 22:29:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:18,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:18,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127276304] [2021-06-05 22:29:18,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127276304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:18,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506280351] [2021-06-05 22:29:18,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:18,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:18,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506280351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:18,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:18,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810570244] [2021-06-05 22:29:18,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:18,631 INFO L87 Difference]: Start difference. First operand 1744 states and 4341 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:19,214 INFO L93 Difference]: Finished difference Result 1910 states and 4736 transitions. [2021-06-05 22:29:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:19,217 INFO L225 Difference]: With dead ends: 1910 [2021-06-05 22:29:19,217 INFO L226 Difference]: Without dead ends: 1880 [2021-06-05 22:29:19,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 985.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:29:19,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-06-05 22:29:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1752. [2021-06-05 22:29:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-06-05 22:29:19,233 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-06-05 22:29:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:19,233 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-06-05 22:29:19,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-06-05 22:29:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:19,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:19,234 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:19,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-06-05 22:29:19,435 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:19,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:19,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1048667266, now seen corresponding path program 119 times [2021-06-05 22:29:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:19,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308942911] [2021-06-05 22:29:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308942911] [2021-06-05 22:29:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308942911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308861740] [2021-06-05 22:29:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:19,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:29:19,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:19,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:20,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308861740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:20,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:20,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:20,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804524258] [2021-06-05 22:29:20,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:20,067 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:20,611 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-06-05 22:29:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:20,613 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 22:29:20,613 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 22:29:20,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 816.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 22:29:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1752. [2021-06-05 22:29:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.4905768132495716) internal successors, (4361), 1751 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 4361 transitions. [2021-06-05 22:29:20,632 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 4361 transitions. Word has length 32 [2021-06-05 22:29:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:20,632 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 4361 transitions. [2021-06-05 22:29:20,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 4361 transitions. [2021-06-05 22:29:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:20,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:20,634 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:20,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-05 22:29:20,835 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 343764930, now seen corresponding path program 120 times [2021-06-05 22:29:20,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:20,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281214781] [2021-06-05 22:29:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:21,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:21,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281214781] [2021-06-05 22:29:21,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281214781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:21,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188997711] [2021-06-05 22:29:21,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:21,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:29:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:21,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188997711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:21,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:21,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:21,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8342441] [2021-06-05 22:29:21,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:21,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:21,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:21,575 INFO L87 Difference]: Start difference. First operand 1752 states and 4361 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:22,537 INFO L93 Difference]: Finished difference Result 1950 states and 4840 transitions. [2021-06-05 22:29:22,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:29:22,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:22,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:22,539 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 22:29:22,539 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 22:29:22,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1241.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1485, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:29:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 22:29:22,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1776. [2021-06-05 22:29:22,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-06-05 22:29:22,555 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-06-05 22:29:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:22,555 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-06-05 22:29:22,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-06-05 22:29:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:22,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:22,557 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:22,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1625 [2021-06-05 22:29:22,773 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1387004802, now seen corresponding path program 121 times [2021-06-05 22:29:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:22,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754011065] [2021-06-05 22:29:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:22,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:22,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754011065] [2021-06-05 22:29:22,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754011065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:22,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539944065] [2021-06-05 22:29:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:22,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:23,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539944065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:23,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:23,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:23,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99361908] [2021-06-05 22:29:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:23,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:23,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:23,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:23,445 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:24,220 INFO L93 Difference]: Finished difference Result 1942 states and 4820 transitions. [2021-06-05 22:29:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:24,223 INFO L225 Difference]: With dead ends: 1942 [2021-06-05 22:29:24,223 INFO L226 Difference]: Without dead ends: 1920 [2021-06-05 22:29:24,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1113.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-05 22:29:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1776. [2021-06-05 22:29:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 2.4907042253521126) internal successors, (4421), 1775 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 4421 transitions. [2021-06-05 22:29:24,247 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 4421 transitions. Word has length 32 [2021-06-05 22:29:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:24,247 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 4421 transitions. [2021-06-05 22:29:24,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 4421 transitions. [2021-06-05 22:29:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:24,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:24,249 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:24,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1647 [2021-06-05 22:29:24,465 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1405252934, now seen corresponding path program 122 times [2021-06-05 22:29:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:24,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502800345] [2021-06-05 22:29:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502800345] [2021-06-05 22:29:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502800345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066077537] [2021-06-05 22:29:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:24,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:24,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066077537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:25,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:25,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059301839] [2021-06-05 22:29:25,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:25,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:25,094 INFO L87 Difference]: Start difference. First operand 1776 states and 4421 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:25,854 INFO L93 Difference]: Finished difference Result 1966 states and 4872 transitions. [2021-06-05 22:29:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:25,856 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 22:29:25,856 INFO L226 Difference]: Without dead ends: 1928 [2021-06-05 22:29:25,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1054.0ms TimeCoverageRelationStatistics Valid=316, Invalid=1576, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:29:25,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-06-05 22:29:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1792. [2021-06-05 22:29:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 2.490787269681742) internal successors, (4461), 1791 states have internal predecessors, (4461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 4461 transitions. [2021-06-05 22:29:25,877 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 4461 transitions. Word has length 32 [2021-06-05 22:29:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:25,877 INFO L482 AbstractCegarLoop]: Abstraction has 1792 states and 4461 transitions. [2021-06-05 22:29:25,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:25,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 4461 transitions. [2021-06-05 22:29:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:25,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:25,879 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:26,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,081 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:26,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2028269506, now seen corresponding path program 123 times [2021-06-05 22:29:26,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:26,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427124876] [2021-06-05 22:29:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427124876] [2021-06-05 22:29:26,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427124876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390276608] [2021-06-05 22:29:26,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:29:26,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:26,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:26,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390276608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:26,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:26,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672940252] [2021-06-05 22:29:26,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:26,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:26,767 INFO L87 Difference]: Start difference. First operand 1792 states and 4461 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:27,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:27,369 INFO L93 Difference]: Finished difference Result 1966 states and 4876 transitions. [2021-06-05 22:29:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:27,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:27,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:27,372 INFO L225 Difference]: With dead ends: 1966 [2021-06-05 22:29:27,372 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 22:29:27,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 923.2ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 22:29:27,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1800. [2021-06-05 22:29:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 2.49082823790995) internal successors, (4481), 1799 states have internal predecessors, (4481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 4481 transitions. [2021-06-05 22:29:27,388 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 4481 transitions. Word has length 32 [2021-06-05 22:29:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:27,388 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 4481 transitions. [2021-06-05 22:29:27,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 4481 transitions. [2021-06-05 22:29:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:27,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:27,390 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:27,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 22:29:27,605 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1689931970, now seen corresponding path program 124 times [2021-06-05 22:29:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:27,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025174865] [2021-06-05 22:29:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:27,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025174865] [2021-06-05 22:29:27,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025174865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587050744] [2021-06-05 22:29:27,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:27,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:27,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587050744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:28,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:28,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045533207] [2021-06-05 22:29:28,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:28,285 INFO L87 Difference]: Start difference. First operand 1800 states and 4481 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:29,017 INFO L93 Difference]: Finished difference Result 2102 states and 5216 transitions. [2021-06-05 22:29:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:29,019 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 22:29:29,019 INFO L226 Difference]: Without dead ends: 2072 [2021-06-05 22:29:29,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1024.5ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-05 22:29:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1816. [2021-06-05 22:29:29,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 2.4909090909090907) internal successors, (4521), 1815 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 4521 transitions. [2021-06-05 22:29:29,034 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 4521 transitions. Word has length 32 [2021-06-05 22:29:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:29,034 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 4521 transitions. [2021-06-05 22:29:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 4521 transitions. [2021-06-05 22:29:29,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:29,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:29,036 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:29,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-05 22:29:29,236 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:29,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:29,237 INFO L82 PathProgramCache]: Analyzing trace with hash -59085894, now seen corresponding path program 125 times [2021-06-05 22:29:29,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:29,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525832665] [2021-06-05 22:29:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:29,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525832665] [2021-06-05 22:29:29,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525832665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151247549] [2021-06-05 22:29:29,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:29,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:29:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151247549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:29,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:29,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002143834] [2021-06-05 22:29:29,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:29,910 INFO L87 Difference]: Start difference. First operand 1816 states and 4521 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:30,621 INFO L93 Difference]: Finished difference Result 2070 states and 5140 transitions. [2021-06-05 22:29:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:30,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:30,623 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 22:29:30,623 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 22:29:30,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1064.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:29:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 22:29:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1840. [2021-06-05 22:29:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 2.4910277324632952) internal successors, (4581), 1839 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 4581 transitions. [2021-06-05 22:29:30,637 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 4581 transitions. Word has length 32 [2021-06-05 22:29:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:30,637 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 4581 transitions. [2021-06-05 22:29:30,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 4581 transitions. [2021-06-05 22:29:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:30,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:30,639 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:30,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-06-05 22:29:30,839 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1216056506, now seen corresponding path program 126 times [2021-06-05 22:29:30,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:30,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157747067] [2021-06-05 22:29:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:31,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157747067] [2021-06-05 22:29:31,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157747067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044902829] [2021-06-05 22:29:31,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:29:31,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:31,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044902829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:31,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094230923] [2021-06-05 22:29:31,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:31,560 INFO L87 Difference]: Start difference. First operand 1840 states and 4581 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:32,283 INFO L93 Difference]: Finished difference Result 2150 states and 5328 transitions. [2021-06-05 22:29:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:32,285 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 22:29:32,285 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 22:29:32,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1124.6ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 22:29:32,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1864. [2021-06-05 22:29:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.4911433172302737) internal successors, (4641), 1863 states have internal predecessors, (4641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4641 transitions. [2021-06-05 22:29:32,300 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4641 transitions. Word has length 32 [2021-06-05 22:29:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:32,300 INFO L482 AbstractCegarLoop]: Abstraction has 1864 states and 4641 transitions. [2021-06-05 22:29:32,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4641 transitions. [2021-06-05 22:29:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:32,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:32,302 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:32,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,502 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:32,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:32,502 INFO L82 PathProgramCache]: Analyzing trace with hash 690028670, now seen corresponding path program 127 times [2021-06-05 22:29:32,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:32,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814729094] [2021-06-05 22:29:32,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814729094] [2021-06-05 22:29:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814729094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976117308] [2021-06-05 22:29:32,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976117308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95773833] [2021-06-05 22:29:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:33,049 INFO L87 Difference]: Start difference. First operand 1864 states and 4641 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:33,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:33,483 INFO L93 Difference]: Finished difference Result 2022 states and 5012 transitions. [2021-06-05 22:29:33,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:33,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:33,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:33,485 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 22:29:33,485 INFO L226 Difference]: Without dead ends: 1984 [2021-06-05 22:29:33,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:29:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-06-05 22:29:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1880. [2021-06-05 22:29:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 2.491218733368813) internal successors, (4681), 1879 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 4681 transitions. [2021-06-05 22:29:33,500 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 4681 transitions. Word has length 32 [2021-06-05 22:29:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:33,500 INFO L482 AbstractCegarLoop]: Abstraction has 1880 states and 4681 transitions. [2021-06-05 22:29:33,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 4681 transitions. [2021-06-05 22:29:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:33,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:33,501 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:33,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 22:29:33,702 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash 877718970, now seen corresponding path program 128 times [2021-06-05 22:29:33,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:33,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022513918] [2021-06-05 22:29:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:33,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022513918] [2021-06-05 22:29:33,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022513918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903153831] [2021-06-05 22:29:33,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:33,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:33,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903153831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:34,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:34,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818950936] [2021-06-05 22:29:34,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:34,365 INFO L87 Difference]: Start difference. First operand 1880 states and 4681 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:34,955 INFO L93 Difference]: Finished difference Result 2126 states and 5272 transitions. [2021-06-05 22:29:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:34,957 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 22:29:34,957 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 22:29:34,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 22:29:34,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1920. [2021-06-05 22:29:34,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 2.4914017717561228) internal successors, (4781), 1919 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 4781 transitions. [2021-06-05 22:29:34,973 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 4781 transitions. Word has length 32 [2021-06-05 22:29:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:34,973 INFO L482 AbstractCegarLoop]: Abstraction has 1920 states and 4781 transitions. [2021-06-05 22:29:34,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 4781 transitions. [2021-06-05 22:29:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:34,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:34,974 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:35,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1784 [2021-06-05 22:29:35,175 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:35,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:35,175 INFO L82 PathProgramCache]: Analyzing trace with hash -587357826, now seen corresponding path program 129 times [2021-06-05 22:29:35,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:35,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376645141] [2021-06-05 22:29:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:35,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:35,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376645141] [2021-06-05 22:29:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376645141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209403988] [2021-06-05 22:29:35,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:35,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:29:35,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:35,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:35,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:35,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209403988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:35,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:35,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83140518] [2021-06-05 22:29:35,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:35,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:35,719 INFO L87 Difference]: Start difference. First operand 1920 states and 4781 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:36,334 INFO L93 Difference]: Finished difference Result 2078 states and 5152 transitions. [2021-06-05 22:29:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:36,336 INFO L225 Difference]: With dead ends: 2078 [2021-06-05 22:29:36,336 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 22:29:36,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:29:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 22:29:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1912. [2021-06-05 22:29:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-06-05 22:29:36,351 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-06-05 22:29:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:36,352 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-06-05 22:29:36,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-06-05 22:29:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:36,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:36,353 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:36,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1801 [2021-06-05 22:29:36,554 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:36,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:36,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1197117250, now seen corresponding path program 130 times [2021-06-05 22:29:36,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:36,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144183986] [2021-06-05 22:29:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144183986] [2021-06-05 22:29:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144183986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390939408] [2021-06-05 22:29:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:36,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:36,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:37,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390939408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:37,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:37,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:37,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435652994] [2021-06-05 22:29:37,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:37,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:37,194 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:37,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:37,763 INFO L93 Difference]: Finished difference Result 2070 states and 5132 transitions. [2021-06-05 22:29:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:29:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:37,765 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 22:29:37,765 INFO L226 Difference]: Without dead ends: 2032 [2021-06-05 22:29:37,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 883.8ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:29:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-05 22:29:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1912. [2021-06-05 22:29:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 2.491365777080063) internal successors, (4761), 1911 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 4761 transitions. [2021-06-05 22:29:37,781 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 4761 transitions. Word has length 32 [2021-06-05 22:29:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 1912 states and 4761 transitions. [2021-06-05 22:29:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 4761 transitions. [2021-06-05 22:29:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:37,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:37,783 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:37,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-06-05 22:29:37,983 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:37,984 INFO L82 PathProgramCache]: Analyzing trace with hash 991178818, now seen corresponding path program 131 times [2021-06-05 22:29:37,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:37,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800091947] [2021-06-05 22:29:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800091947] [2021-06-05 22:29:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800091947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212145278] [2021-06-05 22:29:38,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:38,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:29:38,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:38,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212145278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:38,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:38,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215902819] [2021-06-05 22:29:38,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:38,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:38,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:38,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:38,615 INFO L87 Difference]: Start difference. First operand 1912 states and 4761 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:39,228 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-06-05 22:29:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:39,230 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 22:29:39,230 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 22:29:39,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 954.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:39,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 22:29:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1928. [2021-06-05 22:29:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 2.4914374675661652) internal successors, (4801), 1927 states have internal predecessors, (4801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 4801 transitions. [2021-06-05 22:29:39,254 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 4801 transitions. Word has length 32 [2021-06-05 22:29:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:39,254 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 4801 transitions. [2021-06-05 22:29:39,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 4801 transitions. [2021-06-05 22:29:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:39,255 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:39,255 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:39,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1832 [2021-06-05 22:29:39,456 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash 652841282, now seen corresponding path program 132 times [2021-06-05 22:29:39,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:39,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392374748] [2021-06-05 22:29:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:39,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:39,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392374748] [2021-06-05 22:29:39,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392374748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:39,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595988136] [2021-06-05 22:29:39,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:39,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:29:39,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:39,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595988136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:40,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:40,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287056915] [2021-06-05 22:29:40,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:40,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:40,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:40,049 INFO L87 Difference]: Start difference. First operand 1928 states and 4801 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:40,692 INFO L93 Difference]: Finished difference Result 2142 states and 5316 transitions. [2021-06-05 22:29:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:40,695 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 22:29:40,695 INFO L226 Difference]: Without dead ends: 2112 [2021-06-05 22:29:40,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-05 22:29:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1944. [2021-06-05 22:29:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 2.4915079773546065) internal successors, (4841), 1943 states have internal predecessors, (4841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 4841 transitions. [2021-06-05 22:29:40,710 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 4841 transitions. Word has length 32 [2021-06-05 22:29:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:40,710 INFO L482 AbstractCegarLoop]: Abstraction has 1944 states and 4841 transitions. [2021-06-05 22:29:40,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 4841 transitions. [2021-06-05 22:29:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:40,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:40,711 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,912 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash 634593150, now seen corresponding path program 133 times [2021-06-05 22:29:40,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325497916] [2021-06-05 22:29:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:41,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325497916] [2021-06-05 22:29:41,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325497916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999542272] [2021-06-05 22:29:41,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999542272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:41,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:41,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760522583] [2021-06-05 22:29:41,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:41,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:41,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:41,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:41,480 INFO L87 Difference]: Start difference. First operand 1944 states and 4841 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:41,987 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-06-05 22:29:41,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:41,989 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 22:29:41,989 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 22:29:41,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 22:29:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1976. [2021-06-05 22:29:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 2.4916455696202533) internal successors, (4921), 1975 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 4921 transitions. [2021-06-05 22:29:42,007 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 4921 transitions. Word has length 32 [2021-06-05 22:29:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:42,007 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 4921 transitions. [2021-06-05 22:29:42,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 4921 transitions. [2021-06-05 22:29:42,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:42,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:42,009 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:42,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1866 [2021-06-05 22:29:42,210 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:42,210 INFO L82 PathProgramCache]: Analyzing trace with hash 343700418, now seen corresponding path program 134 times [2021-06-05 22:29:42,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:42,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047638575] [2021-06-05 22:29:42,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:42,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047638575] [2021-06-05 22:29:42,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047638575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732184484] [2021-06-05 22:29:42,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:42,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:42,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:42,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732184484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:42,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:42,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115059580] [2021-06-05 22:29:42,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:42,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:42,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:42,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:42,788 INFO L87 Difference]: Start difference. First operand 1976 states and 4921 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:43,627 INFO L93 Difference]: Finished difference Result 2278 states and 5656 transitions. [2021-06-05 22:29:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:29:43,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:43,629 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 22:29:43,629 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 22:29:43,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:29:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 22:29:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1992. [2021-06-05 22:29:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 2.4917127071823204) internal successors, (4961), 1991 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 4961 transitions. [2021-06-05 22:29:43,645 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 4961 transitions. Word has length 32 [2021-06-05 22:29:43,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:43,645 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 4961 transitions. [2021-06-05 22:29:43,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 4961 transitions. [2021-06-05 22:29:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:43,646 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:43,646 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:43,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-06-05 22:29:43,847 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:43,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1571398014, now seen corresponding path program 135 times [2021-06-05 22:29:43,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:43,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378338706] [2021-06-05 22:29:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:44,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:44,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378338706] [2021-06-05 22:29:44,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378338706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:44,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419207] [2021-06-05 22:29:44,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:44,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:29:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:44,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:44,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:44,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:44,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:44,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748977954] [2021-06-05 22:29:44,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:44,499 INFO L87 Difference]: Start difference. First operand 1992 states and 4961 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:45,123 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-06-05 22:29:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:45,123 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:45,125 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 22:29:45,125 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 22:29:45,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:45,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 22:29:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2008. [2021-06-05 22:29:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 2.491778774289985) internal successors, (5001), 2007 states have internal predecessors, (5001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 5001 transitions. [2021-06-05 22:29:45,143 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 5001 transitions. Word has length 32 [2021-06-05 22:29:45,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:45,143 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 5001 transitions. [2021-06-05 22:29:45,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 5001 transitions. [2021-06-05 22:29:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:45,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:45,145 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:45,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1891 [2021-06-05 22:29:45,349 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1759088314, now seen corresponding path program 136 times [2021-06-05 22:29:45,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:45,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931422175] [2021-06-05 22:29:45,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:45,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931422175] [2021-06-05 22:29:45,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931422175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822052694] [2021-06-05 22:29:45,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:45,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822052694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:46,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:46,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420868016] [2021-06-05 22:29:46,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:46,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:46,030 INFO L87 Difference]: Start difference. First operand 2008 states and 5001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:46,681 INFO L93 Difference]: Finished difference Result 2230 states and 5532 transitions. [2021-06-05 22:29:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:46,683 INFO L225 Difference]: With dead ends: 2230 [2021-06-05 22:29:46,683 INFO L226 Difference]: Without dead ends: 2192 [2021-06-05 22:29:46,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 973.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:29:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-06-05 22:29:46,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2024. [2021-06-05 22:29:46,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 22:29:46,701 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 22:29:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:46,701 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 22:29:46,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:46,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 22:29:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:46,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:46,703 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:46,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-06-05 22:29:46,903 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1039064706, now seen corresponding path program 137 times [2021-06-05 22:29:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023171849] [2021-06-05 22:29:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023171849] [2021-06-05 22:29:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023171849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540718400] [2021-06-05 22:29:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:47,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:29:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:47,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540718400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:47,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:47,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497419871] [2021-06-05 22:29:47,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:47,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:47,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:47,717 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:48,396 INFO L93 Difference]: Finished difference Result 2238 states and 5552 transitions. [2021-06-05 22:29:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:48,398 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 22:29:48,398 INFO L226 Difference]: Without dead ends: 2200 [2021-06-05 22:29:48,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1166.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-06-05 22:29:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2032. [2021-06-05 22:29:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.4918759231905465) internal successors, (5061), 2031 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5061 transitions. [2021-06-05 22:29:48,414 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5061 transitions. Word has length 32 [2021-06-05 22:29:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5061 transitions. [2021-06-05 22:29:48,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5061 transitions. [2021-06-05 22:29:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:48,416 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:48,416 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:48,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1921,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:48,616 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:48,616 INFO L82 PathProgramCache]: Analyzing trace with hash -851374406, now seen corresponding path program 138 times [2021-06-05 22:29:48,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:48,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773889508] [2021-06-05 22:29:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:48,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773889508] [2021-06-05 22:29:48,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773889508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433355833] [2021-06-05 22:29:48,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:48,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:29:48,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:48,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433355833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:49,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271618254] [2021-06-05 22:29:49,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:49,466 INFO L87 Difference]: Start difference. First operand 2032 states and 5061 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:50,266 INFO L93 Difference]: Finished difference Result 2286 states and 5680 transitions. [2021-06-05 22:29:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:29:50,266 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:50,268 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 22:29:50,268 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 22:29:50,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1320.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1361, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 22:29:50,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2024. [2021-06-05 22:29:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 22:29:50,286 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 22:29:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:50,287 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 22:29:50,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 22:29:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:50,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:50,288 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:50,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:50,491 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1377402242, now seen corresponding path program 139 times [2021-06-05 22:29:50,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:50,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061685366] [2021-06-05 22:29:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:50,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061685366] [2021-06-05 22:29:50,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061685366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:50,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080117077] [2021-06-05 22:29:50,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:50,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080117077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:51,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052628024] [2021-06-05 22:29:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:51,115 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:51,772 INFO L93 Difference]: Finished difference Result 2174 states and 5392 transitions. [2021-06-05 22:29:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:51,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:51,775 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 22:29:51,775 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 22:29:51,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:29:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 22:29:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2024. [2021-06-05 22:29:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 22:29:51,791 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 22:29:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,791 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 22:29:51,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 22:29:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:51,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,793 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:51,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1959,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:51,993 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:51,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1189711942, now seen corresponding path program 140 times [2021-06-05 22:29:51,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:51,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678471280] [2021-06-05 22:29:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678471280] [2021-06-05 22:29:52,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678471280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595877465] [2021-06-05 22:29:52,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:52,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:52,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595877465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:52,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261531817] [2021-06-05 22:29:52,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:52,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:52,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:52,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:52,710 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:53,517 INFO L93 Difference]: Finished difference Result 2286 states and 5676 transitions. [2021-06-05 22:29:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:53,519 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 22:29:53,519 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 22:29:53,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1189.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 22:29:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2024. [2021-06-05 22:29:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.4918437963420663) internal successors, (5041), 2023 states have internal predecessors, (5041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5041 transitions. [2021-06-05 22:29:53,537 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5041 transitions. Word has length 32 [2021-06-05 22:29:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:53,537 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5041 transitions. [2021-06-05 22:29:53,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5041 transitions. [2021-06-05 22:29:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:53,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:53,538 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:53,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1976,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,739 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:53,739 INFO L82 PathProgramCache]: Analyzing trace with hash 85430458, now seen corresponding path program 141 times [2021-06-05 22:29:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:53,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753389580] [2021-06-05 22:29:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:53,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753389580] [2021-06-05 22:29:53,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753389580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065027641] [2021-06-05 22:29:53,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:29:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065027641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:54,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:54,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854216357] [2021-06-05 22:29:54,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:54,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:54,418 INFO L87 Difference]: Start difference. First operand 2024 states and 5041 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:55,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:55,183 INFO L93 Difference]: Finished difference Result 2206 states and 5476 transitions. [2021-06-05 22:29:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:55,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:55,186 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 22:29:55,186 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 22:29:55,186 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:29:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 22:29:55,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2048. [2021-06-05 22:29:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 2.4919394235466537) internal successors, (5101), 2047 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 5101 transitions. [2021-06-05 22:29:55,203 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 5101 transitions. Word has length 32 [2021-06-05 22:29:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:55,203 INFO L482 AbstractCegarLoop]: Abstraction has 2048 states and 5101 transitions. [2021-06-05 22:29:55,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 5101 transitions. [2021-06-05 22:29:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:55,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:55,204 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:55,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 22:29:55,405 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash -120507974, now seen corresponding path program 142 times [2021-06-05 22:29:55,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:55,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195096918] [2021-06-05 22:29:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:55,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195096918] [2021-06-05 22:29:55,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195096918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840656671] [2021-06-05 22:29:55,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:55,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840656671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:56,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:56,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783158496] [2021-06-05 22:29:56,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:56,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:56,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:56,072 INFO L87 Difference]: Start difference. First operand 2048 states and 5101 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:56,771 INFO L93 Difference]: Finished difference Result 2278 states and 5660 transitions. [2021-06-05 22:29:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:56,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:56,773 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 22:29:56,773 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 22:29:56,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=338, Invalid=1554, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:29:56,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 22:29:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2056. [2021-06-05 22:29:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.491970802919708) internal successors, (5121), 2055 states have internal predecessors, (5121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5121 transitions. [2021-06-05 22:29:56,789 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5121 transitions. Word has length 32 [2021-06-05 22:29:56,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:56,789 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5121 transitions. [2021-06-05 22:29:56,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5121 transitions. [2021-06-05 22:29:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:56,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:56,791 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:56,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 22:29:56,991 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:56,991 INFO L82 PathProgramCache]: Analyzing trace with hash 67182326, now seen corresponding path program 143 times [2021-06-05 22:29:56,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:56,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669206320] [2021-06-05 22:29:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669206320] [2021-06-05 22:29:57,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669206320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37192875] [2021-06-05 22:29:57,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:57,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:29:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:29:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37192875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:57,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:57,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175027100] [2021-06-05 22:29:57,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:57,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:57,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:57,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:57,741 INFO L87 Difference]: Start difference. First operand 2056 states and 5121 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:58,440 INFO L93 Difference]: Finished difference Result 2238 states and 5556 transitions. [2021-06-05 22:29:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:58,441 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:58,443 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 22:29:58,443 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 22:29:58,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1092.7ms TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:29:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 22:29:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2080. [2021-06-05 22:29:58,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.492063492063492) internal successors, (5181), 2079 states have internal predecessors, (5181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5181 transitions. [2021-06-05 22:29:58,459 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5181 transitions. Word has length 32 [2021-06-05 22:29:58,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:58,459 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5181 transitions. [2021-06-05 22:29:58,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:58,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5181 transitions. [2021-06-05 22:29:58,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:58,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:58,461 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:58,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-06-05 22:29:58,661 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2084499522, now seen corresponding path program 144 times [2021-06-05 22:29:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:58,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032832396] [2021-06-05 22:29:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032832396] [2021-06-05 22:29:58,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032832396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198871867] [2021-06-05 22:29:58,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:58,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:29:58,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:29:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198871867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:59,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:29:59,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083141986] [2021-06-05 22:29:59,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:29:59,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:29:59,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:59,141 INFO L87 Difference]: Start difference. First operand 2080 states and 5181 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:59,476 INFO L93 Difference]: Finished difference Result 2198 states and 5456 transitions. [2021-06-05 22:29:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:29:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:59,478 INFO L225 Difference]: With dead ends: 2198 [2021-06-05 22:29:59,478 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 22:29:59,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:29:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 22:29:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2064. [2021-06-05 22:29:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.49006301502666) internal successors, (5137), 2063 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5137 transitions. [2021-06-05 22:29:59,495 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5137 transitions. Word has length 32 [2021-06-05 22:29:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:59,495 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5137 transitions. [2021-06-05 22:29:59,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:29:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5137 transitions. [2021-06-05 22:29:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:29:59,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:59,497 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:59,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:59,697 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash 619422726, now seen corresponding path program 145 times [2021-06-05 22:29:59,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:59,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205272867] [2021-06-05 22:29:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,964 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 13 [2021-06-05 22:30:00,121 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 7 [2021-06-05 22:30:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:00,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205272867] [2021-06-05 22:30:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205272867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316062447] [2021-06-05 22:30:00,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:00,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316062447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:00,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743016357] [2021-06-05 22:30:00,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:00,510 INFO L87 Difference]: Start difference. First operand 2064 states and 5137 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:00,893 INFO L93 Difference]: Finished difference Result 2230 states and 5536 transitions. [2021-06-05 22:30:00,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:00,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:00,895 INFO L225 Difference]: With dead ends: 2230 [2021-06-05 22:30:00,895 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 22:30:00,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 564.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 22:30:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2072. [2021-06-05 22:30:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-06-05 22:30:00,911 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-06-05 22:30:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:00,911 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-06-05 22:30:00,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-06-05 22:30:00,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:00,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:00,913 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:01,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:01,113 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1540223554, now seen corresponding path program 146 times [2021-06-05 22:30:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:01,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630456785] [2021-06-05 22:30:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:01,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630456785] [2021-06-05 22:30:01,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630456785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222659284] [2021-06-05 22:30:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:01,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:01,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222659284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:01,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064841448] [2021-06-05 22:30:01,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:01,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:01,898 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:02,452 INFO L93 Difference]: Finished difference Result 2246 states and 5572 transitions. [2021-06-05 22:30:02,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:02,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:02,455 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 22:30:02,455 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 22:30:02,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 897.6ms TimeCoverageRelationStatistics Valid=286, Invalid=1196, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 22:30:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2072. [2021-06-05 22:30:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.4901014002897153) internal successors, (5157), 2071 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 5157 transitions. [2021-06-05 22:30:02,472 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 5157 transitions. Word has length 32 [2021-06-05 22:30:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:02,472 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 5157 transitions. [2021-06-05 22:30:02,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 5157 transitions. [2021-06-05 22:30:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:02,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:02,474 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:02,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2071 [2021-06-05 22:30:02,676 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:02,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:02,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1737475334, now seen corresponding path program 147 times [2021-06-05 22:30:02,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:02,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56017423] [2021-06-05 22:30:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:04,315 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 56 DAG size of output: 7 [2021-06-05 22:30:08,579 WARN L205 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 69 DAG size of output: 12 [2021-06-05 22:30:14,052 WARN L205 SmtUtils]: Spent 5.46 s on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2021-06-05 22:30:14,366 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2021-06-05 22:30:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56017423] [2021-06-05 22:30:14,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56017423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886278551] [2021-06-05 22:30:14,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:30:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886278551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:14,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:14,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942989947] [2021-06-05 22:30:14,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:14,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:14,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:14,772 INFO L87 Difference]: Start difference. First operand 2072 states and 5157 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:15,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:15,582 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-06-05 22:30:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:30:15,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:15,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:15,585 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 22:30:15,585 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 22:30:15,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 993.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1608, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:30:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 22:30:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2096. [2021-06-05 22:30:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 22:30:15,604 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 22:30:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:15,604 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 22:30:15,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 22:30:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:15,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:15,606 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:15,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,807 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1497849474, now seen corresponding path program 148 times [2021-06-05 22:30:15,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:15,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226136011] [2021-06-05 22:30:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:16,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226136011] [2021-06-05 22:30:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226136011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:16,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863516649] [2021-06-05 22:30:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:16,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:16,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:16,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863516649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:16,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:16,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:16,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509441725] [2021-06-05 22:30:16,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:16,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:16,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:16,448 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:17,017 INFO L93 Difference]: Finished difference Result 2406 states and 5972 transitions. [2021-06-05 22:30:17,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:17,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:17,019 INFO L225 Difference]: With dead ends: 2406 [2021-06-05 22:30:17,020 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 22:30:17,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 22:30:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2080. [2021-06-05 22:30:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-06-05 22:30:17,036 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-06-05 22:30:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:17,036 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-06-05 22:30:17,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-06-05 22:30:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:17,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:17,038 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:17,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:17,239 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:17,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:17,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1310159174, now seen corresponding path program 149 times [2021-06-05 22:30:17,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:17,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696235070] [2021-06-05 22:30:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:17,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:17,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696235070] [2021-06-05 22:30:17,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696235070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544119363] [2021-06-05 22:30:17,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:17,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:30:17,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544119363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:17,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:17,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099861681] [2021-06-05 22:30:17,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:17,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:17,910 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:18,637 INFO L93 Difference]: Finished difference Result 2414 states and 5996 transitions. [2021-06-05 22:30:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,639 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 22:30:18,639 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 22:30:18,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1101.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:30:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 22:30:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2080. [2021-06-05 22:30:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 2.49013949013949) internal successors, (5177), 2079 states have internal predecessors, (5177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 5177 transitions. [2021-06-05 22:30:18,660 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 5177 transitions. Word has length 32 [2021-06-05 22:30:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:18,660 INFO L482 AbstractCegarLoop]: Abstraction has 2080 states and 5177 transitions. [2021-06-05 22:30:18,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 5177 transitions. [2021-06-05 22:30:18,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:18,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:18,662 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:18,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-06-05 22:30:18,862 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:18,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1836187010, now seen corresponding path program 150 times [2021-06-05 22:30:18,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:18,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16478175] [2021-06-05 22:30:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16478175] [2021-06-05 22:30:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16478175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248159920] [2021-06-05 22:30:19,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:30:19,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:19,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248159920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:19,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:19,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145224324] [2021-06-05 22:30:19,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:19,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:19,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:19,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:19,428 INFO L87 Difference]: Start difference. First operand 2080 states and 5177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:20,060 INFO L93 Difference]: Finished difference Result 2214 states and 5488 transitions. [2021-06-05 22:30:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:20,062 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 22:30:20,062 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 22:30:20,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 770.8ms TimeCoverageRelationStatistics Valid=264, Invalid=1458, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:30:20,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 22:30:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 2096. [2021-06-05 22:30:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 22:30:20,078 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 22:30:20,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:20,078 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 22:30:20,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 22:30:20,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:20,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:20,080 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:20,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-06-05 22:30:20,280 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:20,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1648496710, now seen corresponding path program 151 times [2021-06-05 22:30:20,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:20,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277637688] [2021-06-05 22:30:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277637688] [2021-06-05 22:30:20,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277637688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254612098] [2021-06-05 22:30:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:20,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254612098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:20,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:20,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631842027] [2021-06-05 22:30:20,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:20,887 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:21,477 INFO L93 Difference]: Finished difference Result 2366 states and 5864 transitions. [2021-06-05 22:30:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:21,480 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 22:30:21,480 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 22:30:21,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 22:30:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2096. [2021-06-05 22:30:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 22:30:21,497 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 22:30:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:21,497 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 22:30:21,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 22:30:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:21,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:21,498 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:21,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2175,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,699 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:21,699 INFO L82 PathProgramCache]: Analyzing trace with hash 54255998, now seen corresponding path program 152 times [2021-06-05 22:30:21,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:21,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626201296] [2021-06-05 22:30:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626201296] [2021-06-05 22:30:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626201296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976756147] [2021-06-05 22:30:21,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:22,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976756147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:22,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:22,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733438031] [2021-06-05 22:30:22,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:22,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:22,514 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:23,219 INFO L93 Difference]: Finished difference Result 2278 states and 5652 transitions. [2021-06-05 22:30:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:23,221 INFO L225 Difference]: With dead ends: 2278 [2021-06-05 22:30:23,221 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 22:30:23,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1197.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1257, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 22:30:23,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2096. [2021-06-05 22:30:23,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 2.490214797136038) internal successors, (5217), 2095 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 5217 transitions. [2021-06-05 22:30:23,238 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 5217 transitions. Word has length 32 [2021-06-05 22:30:23,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:23,238 INFO L482 AbstractCegarLoop]: Abstraction has 2096 states and 5217 transitions. [2021-06-05 22:30:23,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:23,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 5217 transitions. [2021-06-05 22:30:23,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:23,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:23,239 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:23,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2192 [2021-06-05 22:30:23,440 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:23,440 INFO L82 PathProgramCache]: Analyzing trace with hash 36007866, now seen corresponding path program 153 times [2021-06-05 22:30:23,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:23,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809930192] [2021-06-05 22:30:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809930192] [2021-06-05 22:30:23,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809930192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928048880] [2021-06-05 22:30:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:23,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:30:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:23,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:23,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928048880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:24,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:24,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081493225] [2021-06-05 22:30:24,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:24,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:24,204 INFO L87 Difference]: Start difference. First operand 2096 states and 5217 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:25,079 INFO L93 Difference]: Finished difference Result 2414 states and 5992 transitions. [2021-06-05 22:30:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:25,081 INFO L225 Difference]: With dead ends: 2414 [2021-06-05 22:30:25,081 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 22:30:25,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1292.8ms TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 22:30:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2104. [2021-06-05 22:30:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 2.4902520209224916) internal successors, (5237), 2103 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 5237 transitions. [2021-06-05 22:30:25,102 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 5237 transitions. Word has length 32 [2021-06-05 22:30:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,102 INFO L482 AbstractCegarLoop]: Abstraction has 2104 states and 5237 transitions. [2021-06-05 22:30:25,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 5237 transitions. [2021-06-05 22:30:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:25,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,104 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:25,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2210 [2021-06-05 22:30:25,305 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:25,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1767406466, now seen corresponding path program 154 times [2021-06-05 22:30:25,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:25,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765010190] [2021-06-05 22:30:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:25,570 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 23 [2021-06-05 22:30:25,848 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 20 [2021-06-05 22:30:26,127 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 24 [2021-06-05 22:30:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765010190] [2021-06-05 22:30:26,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765010190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997978082] [2021-06-05 22:30:26,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:26,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997978082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:26,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:26,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585670951] [2021-06-05 22:30:26,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:26,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:26,719 INFO L87 Difference]: Start difference. First operand 2104 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:27,422 INFO L93 Difference]: Finished difference Result 2390 states and 5932 transitions. [2021-06-05 22:30:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:27,425 INFO L225 Difference]: With dead ends: 2390 [2021-06-05 22:30:27,425 INFO L226 Difference]: Without dead ends: 2360 [2021-06-05 22:30:27,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1116.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:27,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-06-05 22:30:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2144. [2021-06-05 22:30:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 2.490433971068595) internal successors, (5337), 2143 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 5337 transitions. [2021-06-05 22:30:27,441 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 5337 transitions. Word has length 32 [2021-06-05 22:30:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:27,441 INFO L482 AbstractCegarLoop]: Abstraction has 2144 states and 5337 transitions. [2021-06-05 22:30:27,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 5337 transitions. [2021-06-05 22:30:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:27,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:27,443 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:27,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-05 22:30:27,644 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash -320577802, now seen corresponding path program 155 times [2021-06-05 22:30:27,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:27,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601578497] [2021-06-05 22:30:27,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:28,118 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-06-05 22:30:28,550 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 27 [2021-06-05 22:30:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:28,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601578497] [2021-06-05 22:30:28,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601578497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308122749] [2021-06-05 22:30:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:30:28,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308122749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:29,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:29,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292930312] [2021-06-05 22:30:29,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:29,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:29,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:29,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:29,168 INFO L87 Difference]: Start difference. First operand 2144 states and 5337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:29,835 INFO L93 Difference]: Finished difference Result 2326 states and 5772 transitions. [2021-06-05 22:30:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:29,838 INFO L225 Difference]: With dead ends: 2326 [2021-06-05 22:30:29,838 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 22:30:29,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1089.4ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:30:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 22:30:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2160. [2021-06-05 22:30:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 2159 states have (on average 2.490504863362668) internal successors, (5377), 2159 states have internal predecessors, (5377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 5377 transitions. [2021-06-05 22:30:29,854 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 5377 transitions. Word has length 32 [2021-06-05 22:30:29,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:29,855 INFO L482 AbstractCegarLoop]: Abstraction has 2160 states and 5377 transitions. [2021-06-05 22:30:29,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 5377 transitions. [2021-06-05 22:30:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:29,856 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:29,856 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:30,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-06-05 22:30:30,057 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 972812730, now seen corresponding path program 156 times [2021-06-05 22:30:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:30,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144430187] [2021-06-05 22:30:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:30,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144430187] [2021-06-05 22:30:30,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144430187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697548919] [2021-06-05 22:30:30,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:30,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:30:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:30,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:30,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697548919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:30,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:30,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436771167] [2021-06-05 22:30:30,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:30,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:30,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:30,774 INFO L87 Difference]: Start difference. First operand 2160 states and 5377 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:31,560 INFO L93 Difference]: Finished difference Result 2374 states and 5888 transitions. [2021-06-05 22:30:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:31,562 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 22:30:31,562 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 22:30:31,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1157.3ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:30:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 22:30:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2168. [2021-06-05 22:30:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 2.490539916935856) internal successors, (5397), 2167 states have internal predecessors, (5397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 5397 transitions. [2021-06-05 22:30:31,582 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 5397 transitions. Word has length 32 [2021-06-05 22:30:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:31,582 INFO L482 AbstractCegarLoop]: Abstraction has 2168 states and 5397 transitions. [2021-06-05 22:30:31,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 5397 transitions. [2021-06-05 22:30:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:31,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:31,584 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:31,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2268 [2021-06-05 22:30:31,785 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash -492264066, now seen corresponding path program 157 times [2021-06-05 22:30:31,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:31,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161087931] [2021-06-05 22:30:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:31,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161087931] [2021-06-05 22:30:31,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161087931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918586135] [2021-06-05 22:30:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918586135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:32,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:32,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092616646] [2021-06-05 22:30:32,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:32,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:32,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:32,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:32,397 INFO L87 Difference]: Start difference. First operand 2168 states and 5397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:33,178 INFO L93 Difference]: Finished difference Result 2470 states and 6128 transitions. [2021-06-05 22:30:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:33,181 INFO L225 Difference]: With dead ends: 2470 [2021-06-05 22:30:33,181 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 22:30:33,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1080.1ms TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 22:30:33,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2176. [2021-06-05 22:30:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 2.4905747126436784) internal successors, (5417), 2175 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 5417 transitions. [2021-06-05 22:30:33,200 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 5417 transitions. Word has length 32 [2021-06-05 22:30:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:33,200 INFO L482 AbstractCegarLoop]: Abstraction has 2176 states and 5417 transitions. [2021-06-05 22:30:33,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 5417 transitions. [2021-06-05 22:30:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:33,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:33,201 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:33,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2291,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,402 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:33,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:33,402 INFO L82 PathProgramCache]: Analyzing trace with hash 954564598, now seen corresponding path program 158 times [2021-06-05 22:30:33,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:33,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78625613] [2021-06-05 22:30:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78625613] [2021-06-05 22:30:33,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78625613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264565747] [2021-06-05 22:30:33,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:33,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:33,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264565747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:34,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282897569] [2021-06-05 22:30:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:34,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:34,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:34,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:34,068 INFO L87 Difference]: Start difference. First operand 2176 states and 5417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:34,784 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-06-05 22:30:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:34,786 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 22:30:34,786 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 22:30:34,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1054.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:34,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 22:30:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2192. [2021-06-05 22:30:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-06-05 22:30:34,806 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-06-05 22:30:34,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,806 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-06-05 22:30:34,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:34,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-06-05 22:30:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:34,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:34,807 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:35,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2312 [2021-06-05 22:30:35,008 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1947970502, now seen corresponding path program 159 times [2021-06-05 22:30:35,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:35,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037389202] [2021-06-05 22:30:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:35,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037389202] [2021-06-05 22:30:35,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037389202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586952747] [2021-06-05 22:30:35,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:30:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586952747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:35,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046781156] [2021-06-05 22:30:35,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:35,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:35,764 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:36,570 INFO L93 Difference]: Finished difference Result 2486 states and 6168 transitions. [2021-06-05 22:30:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:36,572 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 22:30:36,572 INFO L226 Difference]: Without dead ends: 2448 [2021-06-05 22:30:36,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:30:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-06-05 22:30:36,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2216. [2021-06-05 22:30:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2215 states have (on average 2.490744920993228) internal successors, (5517), 2215 states have internal predecessors, (5517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 5517 transitions. [2021-06-05 22:30:36,590 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 5517 transitions. Word has length 32 [2021-06-05 22:30:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:36,590 INFO L482 AbstractCegarLoop]: Abstraction has 2216 states and 5517 transitions. [2021-06-05 22:30:36,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 5517 transitions. [2021-06-05 22:30:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:36,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:36,591 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:36,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2330,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:36,792 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:36,792 INFO L82 PathProgramCache]: Analyzing trace with hash 616227062, now seen corresponding path program 160 times [2021-06-05 22:30:36,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:36,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435864541] [2021-06-05 22:30:36,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:37,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:37,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435864541] [2021-06-05 22:30:37,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435864541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:37,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597726773] [2021-06-05 22:30:37,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:37,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597726773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:37,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:37,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:37,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124226515] [2021-06-05 22:30:37,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:37,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:37,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:37,554 INFO L87 Difference]: Start difference. First operand 2216 states and 5517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:38,277 INFO L93 Difference]: Finished difference Result 2382 states and 5916 transitions. [2021-06-05 22:30:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:38,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:38,279 INFO L225 Difference]: With dead ends: 2382 [2021-06-05 22:30:38,280 INFO L226 Difference]: Without dead ends: 2360 [2021-06-05 22:30:38,280 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:30:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-06-05 22:30:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 2200. [2021-06-05 22:30:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 22:30:38,299 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 22:30:38,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:38,299 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 22:30:38,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 22:30:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:38,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:38,301 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:38,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2355 [2021-06-05 22:30:38,501 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash 747935042, now seen corresponding path program 161 times [2021-06-05 22:30:38,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:38,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54687356] [2021-06-05 22:30:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:38,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54687356] [2021-06-05 22:30:38,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54687356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220781798] [2021-06-05 22:30:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:38,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 22:30:38,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:38,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:39,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220781798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:39,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:39,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:39,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299279804] [2021-06-05 22:30:39,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:39,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:39,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:39,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:39,089 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:39,723 INFO L93 Difference]: Finished difference Result 2294 states and 5692 transitions. [2021-06-05 22:30:39,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:39,723 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:39,725 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 22:30:39,725 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 22:30:39,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 872.9ms TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:30:39,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 22:30:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2200. [2021-06-05 22:30:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 22:30:39,743 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 22:30:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:39,743 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 22:30:39,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 22:30:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:39,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:39,744 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:39,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2374,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:39,945 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:39,945 INFO L82 PathProgramCache]: Analyzing trace with hash -836348222, now seen corresponding path program 162 times [2021-06-05 22:30:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:39,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315086150] [2021-06-05 22:30:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:40,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315086150] [2021-06-05 22:30:40,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315086150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856111298] [2021-06-05 22:30:40,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:40,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:30:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856111298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:40,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:40,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31506388] [2021-06-05 22:30:40,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:40,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:40,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:40,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:40,486 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:41,227 INFO L93 Difference]: Finished difference Result 2366 states and 5872 transitions. [2021-06-05 22:30:41,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:41,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:41,230 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 22:30:41,230 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 22:30:41,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1002.5ms TimeCoverageRelationStatistics Valid=357, Invalid=1449, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 22:30:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2200. [2021-06-05 22:30:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2200 states, 2199 states have (on average 2.490677580718508) internal successors, (5477), 2199 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:41,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2200 states to 2200 states and 5477 transitions. [2021-06-05 22:30:41,247 INFO L78 Accepts]: Start accepts. Automaton has 2200 states and 5477 transitions. Word has length 32 [2021-06-05 22:30:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:41,247 INFO L482 AbstractCegarLoop]: Abstraction has 2200 states and 5477 transitions. [2021-06-05 22:30:41,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2200 states and 5477 transitions. [2021-06-05 22:30:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:41,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:41,249 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:41,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2384,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:41,450 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash 579039674, now seen corresponding path program 163 times [2021-06-05 22:30:41,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:41,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579680028] [2021-06-05 22:30:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:41,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579680028] [2021-06-05 22:30:41,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579680028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088882427] [2021-06-05 22:30:41,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:41,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:42,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088882427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:42,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:42,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:42,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774005501] [2021-06-05 22:30:42,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:42,142 INFO L87 Difference]: Start difference. First operand 2200 states and 5477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:42,796 INFO L93 Difference]: Finished difference Result 2510 states and 6228 transitions. [2021-06-05 22:30:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:42,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:42,798 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 22:30:42,798 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 22:30:42,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1055.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 22:30:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2192. [2021-06-05 22:30:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 2.4906435417617527) internal successors, (5457), 2191 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 5457 transitions. [2021-06-05 22:30:42,820 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 5457 transitions. Word has length 32 [2021-06-05 22:30:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:42,820 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 5457 transitions. [2021-06-05 22:30:42,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 5457 transitions. [2021-06-05 22:30:42,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:42,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:42,821 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:43,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2404,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:43,022 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:43,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1854182074, now seen corresponding path program 164 times [2021-06-05 22:30:43,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:43,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443982844] [2021-06-05 22:30:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:43,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443982844] [2021-06-05 22:30:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443982844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:43,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598658568] [2021-06-05 22:30:43,213 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:43,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598658568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111506254] [2021-06-05 22:30:43,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:43,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:43,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:43,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:43,730 INFO L87 Difference]: Start difference. First operand 2192 states and 5457 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:44,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:44,498 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-06-05 22:30:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:44,500 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 22:30:44,500 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 22:30:44,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1186.9ms TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 22:30:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2208. [2021-06-05 22:30:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.490711372904395) internal successors, (5497), 2207 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5497 transitions. [2021-06-05 22:30:44,519 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5497 transitions. Word has length 32 [2021-06-05 22:30:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:44,519 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 5497 transitions. [2021-06-05 22:30:44,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5497 transitions. [2021-06-05 22:30:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:44,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:44,521 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:44,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,721 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:44,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:44,722 INFO L82 PathProgramCache]: Analyzing trace with hash 389105278, now seen corresponding path program 165 times [2021-06-05 22:30:44,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:44,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005499840] [2021-06-05 22:30:44,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005499840] [2021-06-05 22:30:44,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005499840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47246935] [2021-06-05 22:30:44,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:30:44,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:30:44,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:45,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47246935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:45,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:45,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842308897] [2021-06-05 22:30:45,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:45,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:45,289 INFO L87 Difference]: Start difference. First operand 2208 states and 5497 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:46,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:46,024 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-06-05 22:30:46,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:30:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:46,026 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 22:30:46,026 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 22:30:46,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:30:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 22:30:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2240. [2021-06-05 22:30:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 22:30:46,046 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 22:30:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:46,046 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 22:30:46,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 22:30:46,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:46,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:46,047 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:46,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-06-05 22:30:46,248 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:46,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:46,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1648243642, now seen corresponding path program 166 times [2021-06-05 22:30:46,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:46,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824505570] [2021-06-05 22:30:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:46,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824505570] [2021-06-05 22:30:46,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824505570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:46,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18291192] [2021-06-05 22:30:46,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:46,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18291192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:47,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:47,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844898938] [2021-06-05 22:30:47,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:47,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:47,082 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:47,797 INFO L93 Difference]: Finished difference Result 2470 states and 6132 transitions. [2021-06-05 22:30:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:47,800 INFO L225 Difference]: With dead ends: 2470 [2021-06-05 22:30:47,800 INFO L226 Difference]: Without dead ends: 2440 [2021-06-05 22:30:47,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1188.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:30:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-06-05 22:30:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2248. [2021-06-05 22:30:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:47,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-06-05 22:30:47,819 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-06-05 22:30:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:47,819 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-06-05 22:30:47,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-06-05 22:30:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:47,821 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:47,821 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:48,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2457 [2021-06-05 22:30:48,021 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:48,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:48,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1835933942, now seen corresponding path program 167 times [2021-06-05 22:30:48,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:48,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308132654] [2021-06-05 22:30:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308132654] [2021-06-05 22:30:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308132654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084154737] [2021-06-05 22:30:48,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:48,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:30:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084154737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275312160] [2021-06-05 22:30:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:48,724 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:49,333 INFO L93 Difference]: Finished difference Result 2502 states and 6216 transitions. [2021-06-05 22:30:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:49,335 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 22:30:49,335 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 22:30:49,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1014.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:30:49,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 22:30:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2224. [2021-06-05 22:30:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-06-05 22:30:49,353 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-06-05 22:30:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:49,353 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-06-05 22:30:49,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-06-05 22:30:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:49,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:49,355 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:49,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2471,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:49,556 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1066601158, now seen corresponding path program 168 times [2021-06-05 22:30:49,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:49,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398784443] [2021-06-05 22:30:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:49,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398784443] [2021-06-05 22:30:49,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398784443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:49,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242541299] [2021-06-05 22:30:49,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:49,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:30:49,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:50,187 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-06-05 22:30:50,320 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-06-05 22:30:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242541299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:50,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154948891] [2021-06-05 22:30:50,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:50,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:50,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:50,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:50,482 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:50,778 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-05 22:30:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:51,430 INFO L93 Difference]: Finished difference Result 2478 states and 6156 transitions. [2021-06-05 22:30:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:51,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:51,432 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 22:30:51,432 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 22:30:51,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1476.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:30:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 22:30:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2232. [2021-06-05 22:30:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 22:30:51,451 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 22:30:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:51,451 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 22:30:51,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:51,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 22:30:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:51,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:51,453 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:51,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2487 [2021-06-05 22:30:51,654 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1497596406, now seen corresponding path program 169 times [2021-06-05 22:30:51,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:51,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188620672] [2021-06-05 22:30:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:51,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:51,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188620672] [2021-06-05 22:30:51,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188620672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:51,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483973415] [2021-06-05 22:30:51,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:52,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483973415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:52,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:52,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:52,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063515483] [2021-06-05 22:30:52,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:52,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:52,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:52,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:52,458 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:53,141 INFO L93 Difference]: Finished difference Result 2406 states and 5976 transitions. [2021-06-05 22:30:53,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:53,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:53,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:53,143 INFO L225 Difference]: With dead ends: 2406 [2021-06-05 22:30:53,143 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 22:30:53,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1116.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 22:30:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2224. [2021-06-05 22:30:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.490778227620333) internal successors, (5537), 2223 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5537 transitions. [2021-06-05 22:30:53,161 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5537 transitions. Word has length 32 [2021-06-05 22:30:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:53,161 INFO L482 AbstractCegarLoop]: Abstraction has 2224 states and 5537 transitions. [2021-06-05 22:30:53,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5537 transitions. [2021-06-05 22:30:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:53,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:53,163 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:53,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-05 22:30:53,364 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash 617903418, now seen corresponding path program 170 times [2021-06-05 22:30:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:53,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641254560] [2021-06-05 22:30:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641254560] [2021-06-05 22:30:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641254560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960773283] [2021-06-05 22:30:53,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:53,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:53,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:53,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:54,097 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-06-05 22:30:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960773283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:54,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:54,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151662142] [2021-06-05 22:30:54,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:54,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:54,228 INFO L87 Difference]: Start difference. First operand 2224 states and 5537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:54,902 INFO L93 Difference]: Finished difference Result 2366 states and 5868 transitions. [2021-06-05 22:30:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:54,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:54,905 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 22:30:54,905 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 22:30:54,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1073.2ms TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 22:30:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2232. [2021-06-05 22:30:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 22:30:54,924 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 22:30:54,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:54,924 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 22:30:54,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 22:30:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:54,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:54,925 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:55,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,126 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:55,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1638894150, now seen corresponding path program 171 times [2021-06-05 22:30:55,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:55,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786116898] [2021-06-05 22:30:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:55,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786116898] [2021-06-05 22:30:55,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786116898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176642119] [2021-06-05 22:30:55,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:30:55,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:55,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176642119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:55,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:55,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102875519] [2021-06-05 22:30:55,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:55,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:55,802 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:56,599 INFO L93 Difference]: Finished difference Result 2422 states and 6016 transitions. [2021-06-05 22:30:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:30:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:56,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:56,602 INFO L225 Difference]: With dead ends: 2422 [2021-06-05 22:30:56,602 INFO L226 Difference]: Without dead ends: 2392 [2021-06-05 22:30:56,602 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1019.7ms TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:30:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2021-06-05 22:30:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2232. [2021-06-05 22:30:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 2.4908112953832364) internal successors, (5557), 2231 states have internal predecessors, (5557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 5557 transitions. [2021-06-05 22:30:56,619 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 5557 transitions. Word has length 32 [2021-06-05 22:30:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:56,619 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 5557 transitions. [2021-06-05 22:30:56,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 5557 transitions. [2021-06-05 22:30:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:56,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:56,620 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:56,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-06-05 22:30:56,821 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1657142282, now seen corresponding path program 172 times [2021-06-05 22:30:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:56,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652537338] [2021-06-05 22:30:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652537338] [2021-06-05 22:30:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652537338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100339663] [2021-06-05 22:30:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:57,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:57,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:57,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100339663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148135177] [2021-06-05 22:30:57,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:57,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:57,493 INFO L87 Difference]: Start difference. First operand 2232 states and 5557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:58,016 INFO L93 Difference]: Finished difference Result 2430 states and 6032 transitions. [2021-06-05 22:30:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:58,018 INFO L225 Difference]: With dead ends: 2430 [2021-06-05 22:30:58,018 INFO L226 Difference]: Without dead ends: 2400 [2021-06-05 22:30:58,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:30:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-06-05 22:30:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2240. [2021-06-05 22:30:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 22:30:58,035 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 22:30:58,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:58,035 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 22:30:58,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 22:30:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:58,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:58,037 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:58,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-06-05 22:30:58,238 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:58,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1948035014, now seen corresponding path program 173 times [2021-06-05 22:30:58,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:58,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160833301] [2021-06-05 22:30:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:58,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160833301] [2021-06-05 22:30:58,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160833301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686365104] [2021-06-05 22:30:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:58,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:30:58,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:30:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:58,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686365104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:30:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336653259] [2021-06-05 22:30:58,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:58,824 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:59,261 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-06-05 22:30:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:59,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:30:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:59,263 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 22:30:59,264 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 22:30:59,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 753.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:30:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 22:30:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2240. [2021-06-05 22:30:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 22:30:59,282 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 22:30:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:59,282 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 22:30:59,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:30:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 22:30:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:30:59,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:59,283 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:59,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2582,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:59,484 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1198122614, now seen corresponding path program 174 times [2021-06-05 22:30:59,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:59,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108363274] [2021-06-05 22:30:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:59,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108363274] [2021-06-05 22:30:59,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108363274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108087415] [2021-06-05 22:30:59,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:59,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:30:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:30:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:00,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108087415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:00,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:00,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:00,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218741377] [2021-06-05 22:31:00,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:00,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:00,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:00,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:00,101 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:00,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:00,632 INFO L93 Difference]: Finished difference Result 2334 states and 5792 transitions. [2021-06-05 22:31:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:00,634 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 22:31:00,634 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 22:31:00,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 22:31:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2248. [2021-06-05 22:31:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.490876724521584) internal successors, (5597), 2247 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 5597 transitions. [2021-06-05 22:31:00,651 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 5597 transitions. Word has length 32 [2021-06-05 22:31:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:00,651 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 5597 transitions. [2021-06-05 22:31:00,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 5597 transitions. [2021-06-05 22:31:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:00,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:00,653 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:00,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2590 [2021-06-05 22:31:00,854 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1997723914, now seen corresponding path program 175 times [2021-06-05 22:31:00,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:00,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579673304] [2021-06-05 22:31:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:01,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:01,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579673304] [2021-06-05 22:31:01,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579673304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:01,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035083044] [2021-06-05 22:31:01,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:01,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035083044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:01,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:01,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680018738] [2021-06-05 22:31:01,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:01,427 INFO L87 Difference]: Start difference. First operand 2248 states and 5597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:01,952 INFO L93 Difference]: Finished difference Result 2358 states and 5852 transitions. [2021-06-05 22:31:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:01,954 INFO L225 Difference]: With dead ends: 2358 [2021-06-05 22:31:01,954 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 22:31:01,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 822.8ms TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 22:31:01,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2240. [2021-06-05 22:31:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.4908441268423402) internal successors, (5577), 2239 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5577 transitions. [2021-06-05 22:31:01,972 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5577 transitions. Word has length 32 [2021-06-05 22:31:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:01,972 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5577 transitions. [2021-06-05 22:31:01,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:01,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5577 transitions. [2021-06-05 22:31:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:01,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:01,973 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:02,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2614,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:02,174 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 142122878, now seen corresponding path program 176 times [2021-06-05 22:31:02,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:02,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7498772] [2021-06-05 22:31:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:02,479 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 15 [2021-06-05 22:31:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:02,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7498772] [2021-06-05 22:31:02,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7498772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785843795] [2021-06-05 22:31:02,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:02,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:02,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:02,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785843795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:03,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:03,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032600010] [2021-06-05 22:31:03,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:03,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:03,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:03,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:03,006 INFO L87 Difference]: Start difference. First operand 2240 states and 5577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:03,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:03,548 INFO L93 Difference]: Finished difference Result 2350 states and 5836 transitions. [2021-06-05 22:31:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:03,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:03,551 INFO L225 Difference]: With dead ends: 2350 [2021-06-05 22:31:03,551 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 22:31:03,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:03,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 22:31:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2256. [2021-06-05 22:31:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.4909090909090907) internal successors, (5617), 2255 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 5617 transitions. [2021-06-05 22:31:03,569 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 5617 transitions. Word has length 32 [2021-06-05 22:31:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:03,569 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 5617 transitions. [2021-06-05 22:31:03,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 5617 transitions. [2021-06-05 22:31:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:03,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:03,571 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:03,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-05 22:31:03,780 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash -383904958, now seen corresponding path program 177 times [2021-06-05 22:31:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81875081] [2021-06-05 22:31:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:03,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:03,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81875081] [2021-06-05 22:31:03,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81875081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:03,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868412658] [2021-06-05 22:31:03,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:04,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:31:04,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868412658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:04,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:04,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859746439] [2021-06-05 22:31:04,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:04,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:04,345 INFO L87 Difference]: Start difference. First operand 2256 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:04,943 INFO L93 Difference]: Finished difference Result 2398 states and 5952 transitions. [2021-06-05 22:31:04,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:04,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:04,946 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 22:31:04,946 INFO L226 Difference]: Without dead ends: 2368 [2021-06-05 22:31:04,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-05 22:31:04,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 2272. [2021-06-05 22:31:04,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.4909731395860852) internal successors, (5657), 2271 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 5657 transitions. [2021-06-05 22:31:04,964 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 5657 transitions. Word has length 32 [2021-06-05 22:31:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:04,964 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 5657 transitions. [2021-06-05 22:31:04,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:04,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 5657 transitions. [2021-06-05 22:31:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:04,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:04,966 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:05,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,166 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:05,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:05,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1534555074, now seen corresponding path program 178 times [2021-06-05 22:31:05,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:05,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778146715] [2021-06-05 22:31:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778146715] [2021-06-05 22:31:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778146715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511974833] [2021-06-05 22:31:05,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:05,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:05,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511974833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:05,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949907058] [2021-06-05 22:31:05,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:05,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:05,873 INFO L87 Difference]: Start difference. First operand 2272 states and 5657 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:06,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:06,615 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-06-05 22:31:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:06,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:06,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:06,618 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 22:31:06,618 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 22:31:06,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1130.8ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 22:31:06,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2280. [2021-06-05 22:31:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-06-05 22:31:06,638 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-06-05 22:31:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:06,638 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-06-05 22:31:06,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-06-05 22:31:06,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:06,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:06,640 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:06,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2662 [2021-06-05 22:31:06,840 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:06,841 INFO L82 PathProgramCache]: Analyzing trace with hash -196214658, now seen corresponding path program 179 times [2021-06-05 22:31:06,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:06,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241508039] [2021-06-05 22:31:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241508039] [2021-06-05 22:31:07,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241508039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011830752] [2021-06-05 22:31:07,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:07,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:31:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:31:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011830752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:07,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:07,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360288439] [2021-06-05 22:31:07,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:07,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:07,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:07,491 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:08,050 INFO L93 Difference]: Finished difference Result 2438 states and 6056 transitions. [2021-06-05 22:31:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:08,052 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 22:31:08,052 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 22:31:08,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 22:31:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2280. [2021-06-05 22:31:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.4910048266783678) internal successors, (5677), 2279 states have internal predecessors, (5677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 5677 transitions. [2021-06-05 22:31:08,070 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 5677 transitions. Word has length 32 [2021-06-05 22:31:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:08,071 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 5677 transitions. [2021-06-05 22:31:08,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 5677 transitions. [2021-06-05 22:31:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:08,072 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:08,072 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:08,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:08,273 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:08,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:08,273 INFO L82 PathProgramCache]: Analyzing trace with hash 872989310, now seen corresponding path program 180 times [2021-06-05 22:31:08,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:08,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484686799] [2021-06-05 22:31:08,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484686799] [2021-06-05 22:31:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484686799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969382843] [2021-06-05 22:31:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:08,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:31:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:08,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969382843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:08,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:08,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:08,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168211838] [2021-06-05 22:31:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:08,848 INFO L87 Difference]: Start difference. First operand 2280 states and 5677 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:09,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:09,455 INFO L93 Difference]: Finished difference Result 2534 states and 6288 transitions. [2021-06-05 22:31:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:09,457 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 22:31:09,458 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 22:31:09,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 871.0ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 22:31:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2304. [2021-06-05 22:31:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 2.491098567086409) internal successors, (5737), 2303 states have internal predecessors, (5737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 5737 transitions. [2021-06-05 22:31:09,477 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 5737 transitions. Word has length 32 [2021-06-05 22:31:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:09,477 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 5737 transitions. [2021-06-05 22:31:09,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 5737 transitions. [2021-06-05 22:31:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:09,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:09,478 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:09,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:09,680 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1060679610, now seen corresponding path program 181 times [2021-06-05 22:31:09,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:09,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495171769] [2021-06-05 22:31:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:09,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495171769] [2021-06-05 22:31:09,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495171769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:09,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595936375] [2021-06-05 22:31:09,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:09,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595936375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:10,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:10,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385778822] [2021-06-05 22:31:10,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:10,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:10,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:10,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:10,339 INFO L87 Difference]: Start difference. First operand 2304 states and 5737 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:11,022 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-06-05 22:31:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:11,024 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 22:31:11,024 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 22:31:11,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1000.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:11,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 22:31:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2296. [2021-06-05 22:31:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 2.491067538126362) internal successors, (5717), 2295 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:11,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 5717 transitions. [2021-06-05 22:31:11,044 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 5717 transitions. Word has length 32 [2021-06-05 22:31:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:11,044 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 5717 transitions. [2021-06-05 22:31:11,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:11,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 5717 transitions. [2021-06-05 22:31:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:11,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:11,046 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:11,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2710 [2021-06-05 22:31:11,249 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash 534651774, now seen corresponding path program 182 times [2021-06-05 22:31:11,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:11,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443599237] [2021-06-05 22:31:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:11,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:11,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443599237] [2021-06-05 22:31:11,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443599237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:11,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451956210] [2021-06-05 22:31:11,456 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:11,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:11,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:31:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:11,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451956210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:11,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:11,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:11,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155798879] [2021-06-05 22:31:11,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:11,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:11,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:11,780 INFO L87 Difference]: Start difference. First operand 2296 states and 5717 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:12,204 INFO L93 Difference]: Finished difference Result 2446 states and 6068 transitions. [2021-06-05 22:31:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:12,204 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:12,206 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 22:31:12,206 INFO L226 Difference]: Without dead ends: 2408 [2021-06-05 22:31:12,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:12,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-05 22:31:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2312. [2021-06-05 22:31:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2311 states have (on average 2.491129381220251) internal successors, (5757), 2311 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 5757 transitions. [2021-06-05 22:31:12,224 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 5757 transitions. Word has length 32 [2021-06-05 22:31:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:12,224 INFO L482 AbstractCegarLoop]: Abstraction has 2312 states and 5757 transitions. [2021-06-05 22:31:12,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 5757 transitions. [2021-06-05 22:31:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:12,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:12,226 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:12,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2739,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:12,426 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:12,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:12,427 INFO L82 PathProgramCache]: Analyzing trace with hash 722342074, now seen corresponding path program 183 times [2021-06-05 22:31:12,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:12,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092991555] [2021-06-05 22:31:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:12,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092991555] [2021-06-05 22:31:12,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092991555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:12,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324547352] [2021-06-05 22:31:12,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:12,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:31:12,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324547352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:13,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233441236] [2021-06-05 22:31:13,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:13,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:13,038 INFO L87 Difference]: Start difference. First operand 2312 states and 5757 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:13,627 INFO L93 Difference]: Finished difference Result 2558 states and 6344 transitions. [2021-06-05 22:31:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:13,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:13,630 INFO L225 Difference]: With dead ends: 2558 [2021-06-05 22:31:13,630 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 22:31:13,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 22:31:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2320. [2021-06-05 22:31:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 2.491159982751186) internal successors, (5777), 2319 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 5777 transitions. [2021-06-05 22:31:13,649 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 5777 transitions. Word has length 32 [2021-06-05 22:31:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:13,649 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 5777 transitions. [2021-06-05 22:31:13,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 5777 transitions. [2021-06-05 22:31:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:13,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:13,651 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:13,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2749,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:13,851 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash -742734722, now seen corresponding path program 184 times [2021-06-05 22:31:13,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:13,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697281018] [2021-06-05 22:31:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697281018] [2021-06-05 22:31:13,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697281018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400586182] [2021-06-05 22:31:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:14,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:14,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:14,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:14,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400586182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:14,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:14,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:14,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345181121] [2021-06-05 22:31:14,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:14,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:14,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:14,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:14,447 INFO L87 Difference]: Start difference. First operand 2320 states and 5777 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:15,325 INFO L93 Difference]: Finished difference Result 2502 states and 6212 transitions. [2021-06-05 22:31:15,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:15,328 INFO L225 Difference]: With dead ends: 2502 [2021-06-05 22:31:15,328 INFO L226 Difference]: Without dead ends: 2472 [2021-06-05 22:31:15,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1066.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:31:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-06-05 22:31:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2328. [2021-06-05 22:31:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.4911903738719383) internal successors, (5797), 2327 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5797 transitions. [2021-06-05 22:31:15,348 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5797 transitions. Word has length 32 [2021-06-05 22:31:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:15,348 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 5797 transitions. [2021-06-05 22:31:15,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5797 transitions. [2021-06-05 22:31:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:15,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:15,350 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:15,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2774 [2021-06-05 22:31:15,550 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1888120646, now seen corresponding path program 185 times [2021-06-05 22:31:15,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:15,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256208052] [2021-06-05 22:31:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:15,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:15,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256208052] [2021-06-05 22:31:15,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256208052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:15,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626477006] [2021-06-05 22:31:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:15,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:31:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626477006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:16,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:16,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463778193] [2021-06-05 22:31:16,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:16,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:16,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:16,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:16,322 INFO L87 Difference]: Start difference. First operand 2328 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:17,161 INFO L93 Difference]: Finished difference Result 2686 states and 6664 transitions. [2021-06-05 22:31:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:17,164 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 22:31:17,164 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 22:31:17,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1245.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 22:31:17,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2336. [2021-06-05 22:31:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.491220556745182) internal successors, (5817), 2335 states have internal predecessors, (5817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 5817 transitions. [2021-06-05 22:31:17,183 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 5817 transitions. Word has length 32 [2021-06-05 22:31:17,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:17,183 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 5817 transitions. [2021-06-05 22:31:17,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 5817 transitions. [2021-06-05 22:31:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:17,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:17,185 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:17,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2789,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:17,387 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1880818814, now seen corresponding path program 186 times [2021-06-05 22:31:17,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:17,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918124843] [2021-06-05 22:31:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:17,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918124843] [2021-06-05 22:31:17,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918124843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787278689] [2021-06-05 22:31:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:17,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:31:17,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:17,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:17,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787278689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:17,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:17,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:17,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759612043] [2021-06-05 22:31:17,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:17,980 INFO L87 Difference]: Start difference. First operand 2336 states and 5817 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:18,463 INFO L93 Difference]: Finished difference Result 2526 states and 6268 transitions. [2021-06-05 22:31:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:31:18,463 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:18,465 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 22:31:18,465 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 22:31:18,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:31:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 22:31:18,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2352. [2021-06-05 22:31:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.4912803062526585) internal successors, (5857), 2351 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 5857 transitions. [2021-06-05 22:31:18,484 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 5857 transitions. Word has length 32 [2021-06-05 22:31:18,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:18,484 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 5857 transitions. [2021-06-05 22:31:18,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 5857 transitions. [2021-06-05 22:31:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:18,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:18,486 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:18,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2807,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:18,686 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:18,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2068509114, now seen corresponding path program 187 times [2021-06-05 22:31:18,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:18,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596853356] [2021-06-05 22:31:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:18,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596853356] [2021-06-05 22:31:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596853356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869850983] [2021-06-05 22:31:18,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:18,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:19,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869850983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:19,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:19,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:19,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133104374] [2021-06-05 22:31:19,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:19,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:19,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:19,441 INFO L87 Difference]: Start difference. First operand 2352 states and 5857 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:20,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:20,079 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-06-05 22:31:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:20,081 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 22:31:20,081 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 22:31:20,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1084.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 22:31:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-06-05 22:31:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-06-05 22:31:20,101 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-06-05 22:31:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:20,101 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-06-05 22:31:20,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:20,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-06-05 22:31:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:20,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:20,103 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:20,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2823,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:20,303 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 603432318, now seen corresponding path program 188 times [2021-06-05 22:31:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:20,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506493922] [2021-06-05 22:31:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:20,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:20,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506493922] [2021-06-05 22:31:20,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506493922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:20,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554962084] [2021-06-05 22:31:20,474 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:20,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:20,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:20,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554962084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:20,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:20,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233501826] [2021-06-05 22:31:20,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:20,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:20,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:20,933 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:21,619 INFO L93 Difference]: Finished difference Result 2702 states and 6712 transitions. [2021-06-05 22:31:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:21,621 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 22:31:21,621 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 22:31:21,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 980.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 22:31:21,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2360. [2021-06-05 22:31:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.491309877066554) internal successors, (5877), 2359 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 5877 transitions. [2021-06-05 22:31:21,641 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 5877 transitions. Word has length 32 [2021-06-05 22:31:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:21,641 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 5877 transitions. [2021-06-05 22:31:21,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 5877 transitions. [2021-06-05 22:31:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:21,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:21,643 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:21,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2848 [2021-06-05 22:31:21,843 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash -951315782, now seen corresponding path program 189 times [2021-06-05 22:31:21,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:21,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210294328] [2021-06-05 22:31:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:22,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210294328] [2021-06-05 22:31:22,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210294328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759127232] [2021-06-05 22:31:22,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:22,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 22:31:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:22,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:22,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759127232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:22,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:22,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116139775] [2021-06-05 22:31:22,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:22,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:22,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:22,603 INFO L87 Difference]: Start difference. First operand 2360 states and 5877 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:23,241 INFO L93 Difference]: Finished difference Result 2510 states and 6232 transitions. [2021-06-05 22:31:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:23,243 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 22:31:23,243 INFO L226 Difference]: Without dead ends: 2480 [2021-06-05 22:31:23,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-06-05 22:31:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2392. [2021-06-05 22:31:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:23,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 22:31:23,262 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 22:31:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:23,262 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 22:31:23,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:23,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 22:31:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:23,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:23,264 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:23,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-05 22:31:23,465 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:23,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1878574718, now seen corresponding path program 190 times [2021-06-05 22:31:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82365713] [2021-06-05 22:31:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82365713] [2021-06-05 22:31:23,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82365713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317208238] [2021-06-05 22:31:23,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:23,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:24,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317208238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:24,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:24,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:24,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665133075] [2021-06-05 22:31:24,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:24,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:24,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:24,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:24,121 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:24,964 INFO L93 Difference]: Finished difference Result 2622 states and 6512 transitions. [2021-06-05 22:31:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:24,966 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 22:31:24,966 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 22:31:24,966 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1183.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 22:31:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2392. [2021-06-05 22:31:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:24,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 22:31:24,987 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 22:31:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:24,987 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 22:31:24,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 22:31:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:24,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:24,989 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:25,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:25,189 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1157254214, now seen corresponding path program 191 times [2021-06-05 22:31:25,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:25,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630409378] [2021-06-05 22:31:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:25,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630409378] [2021-06-05 22:31:25,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630409378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:25,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119759425] [2021-06-05 22:31:25,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:25,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:31:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:25,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:25,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119759425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:25,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:25,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:25,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798707662] [2021-06-05 22:31:25,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:25,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:25,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:25,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:25,845 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:26,570 INFO L93 Difference]: Finished difference Result 2710 states and 6692 transitions. [2021-06-05 22:31:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:26,572 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 22:31:26,573 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 22:31:26,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1086.0ms TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:31:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 22:31:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2408. [2021-06-05 22:31:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.493144993768176) internal successors, (6001), 2407 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 6001 transitions. [2021-06-05 22:31:26,592 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 6001 transitions. Word has length 32 [2021-06-05 22:31:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:26,592 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 6001 transitions. [2021-06-05 22:31:26,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:26,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 6001 transitions. [2021-06-05 22:31:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:26,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:26,594 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:26,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2907,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:26,795 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:26,795 INFO L82 PathProgramCache]: Analyzing trace with hash -969563914, now seen corresponding path program 192 times [2021-06-05 22:31:26,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:26,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346209291] [2021-06-05 22:31:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:26,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346209291] [2021-06-05 22:31:26,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346209291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981356009] [2021-06-05 22:31:26,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:26,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:31:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:27,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981356009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:27,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:27,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:27,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414140978] [2021-06-05 22:31:27,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:27,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:27,430 INFO L87 Difference]: Start difference. First operand 2408 states and 6001 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:28,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:28,017 INFO L93 Difference]: Finished difference Result 2614 states and 6496 transitions. [2021-06-05 22:31:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:28,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:28,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:28,019 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 22:31:28,019 INFO L226 Difference]: Without dead ends: 2584 [2021-06-05 22:31:28,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 933.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-05 22:31:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2400. [2021-06-05 22:31:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.4931221342225927) internal successors, (5981), 2399 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5981 transitions. [2021-06-05 22:31:28,040 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5981 transitions. Word has length 32 [2021-06-05 22:31:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:28,040 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5981 transitions. [2021-06-05 22:31:28,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5981 transitions. [2021-06-05 22:31:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:28,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:28,042 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:28,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:28,242 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:28,242 INFO L82 PathProgramCache]: Analyzing trace with hash 422868282, now seen corresponding path program 193 times [2021-06-05 22:31:28,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:28,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897300369] [2021-06-05 22:31:28,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897300369] [2021-06-05 22:31:28,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897300369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717757738] [2021-06-05 22:31:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:28,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717757738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:28,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:28,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971693608] [2021-06-05 22:31:28,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:28,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:28,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:28,965 INFO L87 Difference]: Start difference. First operand 2400 states and 5981 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:29,721 INFO L93 Difference]: Finished difference Result 2670 states and 6632 transitions. [2021-06-05 22:31:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:29,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:29,724 INFO L225 Difference]: With dead ends: 2670 [2021-06-05 22:31:29,724 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 22:31:29,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1197.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 22:31:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2400. [2021-06-05 22:31:29,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-06-05 22:31:29,744 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-06-05 22:31:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:29,744 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-06-05 22:31:29,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-06-05 22:31:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:29,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:29,746 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:29,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-06-05 22:31:29,946 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1307901450, now seen corresponding path program 194 times [2021-06-05 22:31:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:29,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032521325] [2021-06-05 22:31:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:30,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032521325] [2021-06-05 22:31:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032521325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:30,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636390200] [2021-06-05 22:31:30,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:30,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:30,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:30,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636390200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:30,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:30,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:30,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941101008] [2021-06-05 22:31:30,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:30,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:30,687 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:31,393 INFO L93 Difference]: Finished difference Result 2566 states and 6376 transitions. [2021-06-05 22:31:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:31,396 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 22:31:31,396 INFO L226 Difference]: Without dead ends: 2544 [2021-06-05 22:31:31,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1097.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-05 22:31:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2392. [2021-06-05 22:31:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 22:31:31,415 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 22:31:31,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:31,415 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 22:31:31,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 22:31:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:31,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:31,417 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:31,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2974,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:31,617 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:31,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:31,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1176193470, now seen corresponding path program 195 times [2021-06-05 22:31:31,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:31,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121254641] [2021-06-05 22:31:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121254641] [2021-06-05 22:31:31,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121254641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97579774] [2021-06-05 22:31:31,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:31,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:31:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97579774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012595728] [2021-06-05 22:31:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:32,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:32,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:32,153 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:33,106 INFO L93 Difference]: Finished difference Result 2526 states and 6272 transitions. [2021-06-05 22:31:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:33,109 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 22:31:33,109 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 22:31:33,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1186.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:31:33,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 22:31:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2400. [2021-06-05 22:31:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.491454772822009) internal successors, (5977), 2399 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 5977 transitions. [2021-06-05 22:31:33,127 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 5977 transitions. Word has length 32 [2021-06-05 22:31:33,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:33,127 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 5977 transitions. [2021-06-05 22:31:33,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 5977 transitions. [2021-06-05 22:31:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:33,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:33,129 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:33,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 22:31:33,329 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash -988503170, now seen corresponding path program 196 times [2021-06-05 22:31:33,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:33,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672159734] [2021-06-05 22:31:33,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:33,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672159734] [2021-06-05 22:31:33,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672159734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:33,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184785545] [2021-06-05 22:31:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:33,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:33,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:34,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184785545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:34,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:34,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:34,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421672099] [2021-06-05 22:31:34,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:34,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:34,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:34,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:34,071 INFO L87 Difference]: Start difference. First operand 2400 states and 5977 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:34,845 INFO L93 Difference]: Finished difference Result 2534 states and 6292 transitions. [2021-06-05 22:31:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:34,847 INFO L225 Difference]: With dead ends: 2534 [2021-06-05 22:31:34,847 INFO L226 Difference]: Without dead ends: 2504 [2021-06-05 22:31:34,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1173.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:31:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-06-05 22:31:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2392. [2021-06-05 22:31:34,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.491426181514011) internal successors, (5957), 2391 states have internal predecessors, (5957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 5957 transitions. [2021-06-05 22:31:34,868 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 5957 transitions. Word has length 32 [2021-06-05 22:31:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:34,868 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 5957 transitions. [2021-06-05 22:31:34,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 5957 transitions. [2021-06-05 22:31:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:34,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:34,870 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:35,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:35,071 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:35,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1534490562, now seen corresponding path program 197 times [2021-06-05 22:31:35,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:35,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244468347] [2021-06-05 22:31:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:35,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244468347] [2021-06-05 22:31:35,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244468347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207835474] [2021-06-05 22:31:35,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:35,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:31:35,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:35,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207835474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:35,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:35,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503350256] [2021-06-05 22:31:35,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:35,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:35,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:35,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:35,755 INFO L87 Difference]: Start difference. First operand 2392 states and 5957 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:36,580 INFO L93 Difference]: Finished difference Result 2646 states and 6572 transitions. [2021-06-05 22:31:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:31:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:36,583 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 22:31:36,583 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 22:31:36,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1083.9ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:31:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 22:31:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2408. [2021-06-05 22:31:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.4914831740756127) internal successors, (5997), 2407 states have internal predecessors, (5997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 5997 transitions. [2021-06-05 22:31:36,603 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 5997 transitions. Word has length 32 [2021-06-05 22:31:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:36,604 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 5997 transitions. [2021-06-05 22:31:36,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 5997 transitions. [2021-06-05 22:31:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:36,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:36,605 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:36,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:36,806 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1532779138, now seen corresponding path program 198 times [2021-06-05 22:31:36,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:36,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804215727] [2021-06-05 22:31:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:36,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804215727] [2021-06-05 22:31:36,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804215727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403753107] [2021-06-05 22:31:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:37,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:31:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:37,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:37,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403753107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:37,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:37,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:37,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109588427] [2021-06-05 22:31:37,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:37,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:37,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:37,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:37,375 INFO L87 Difference]: Start difference. First operand 2408 states and 5997 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:37,830 INFO L93 Difference]: Finished difference Result 2590 states and 6428 transitions. [2021-06-05 22:31:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:31:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:37,833 INFO L225 Difference]: With dead ends: 2590 [2021-06-05 22:31:37,833 INFO L226 Difference]: Without dead ends: 2552 [2021-06-05 22:31:37,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:31:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-05 22:31:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2416. [2021-06-05 22:31:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-06-05 22:31:37,852 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-06-05 22:31:37,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:37,852 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-06-05 22:31:37,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:37,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-06-05 22:31:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:37,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:37,854 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:38,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 22:31:38,055 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1345088838, now seen corresponding path program 199 times [2021-06-05 22:31:38,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:38,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326730256] [2021-06-05 22:31:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326730256] [2021-06-05 22:31:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326730256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699846099] [2021-06-05 22:31:38,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:38,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699846099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:38,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:38,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850244478] [2021-06-05 22:31:38,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:38,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:38,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:38,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:38,793 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:39,511 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-06-05 22:31:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:39,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:39,513 INFO L225 Difference]: With dead ends: 2774 [2021-06-05 22:31:39,514 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 22:31:39,514 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1137.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 22:31:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2416. [2021-06-05 22:31:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 2415 states have (on average 2.4915113871635612) internal successors, (6017), 2415 states have internal predecessors, (6017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 6017 transitions. [2021-06-05 22:31:39,533 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 6017 transitions. Word has length 32 [2021-06-05 22:31:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:39,533 INFO L482 AbstractCegarLoop]: Abstraction has 2416 states and 6017 transitions. [2021-06-05 22:31:39,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 6017 transitions. [2021-06-05 22:31:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:39,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:39,535 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:39,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:39,736 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:39,736 INFO L82 PathProgramCache]: Analyzing trace with hash -69946438, now seen corresponding path program 200 times [2021-06-05 22:31:39,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:39,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687764594] [2021-06-05 22:31:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:39,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687764594] [2021-06-05 22:31:39,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687764594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:39,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383981415] [2021-06-05 22:31:39,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:39,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:39,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:40,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383981415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:40,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:40,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:40,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408618100] [2021-06-05 22:31:40,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:40,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:40,444 INFO L87 Difference]: Start difference. First operand 2416 states and 6017 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:41,311 INFO L93 Difference]: Finished difference Result 2622 states and 6516 transitions. [2021-06-05 22:31:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:41,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:41,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:41,313 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 22:31:41,313 INFO L226 Difference]: Without dead ends: 2600 [2021-06-05 22:31:41,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1261.7ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:31:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-06-05 22:31:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2440. [2021-06-05 22:31:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 2.4915949159491593) internal successors, (6077), 2439 states have internal predecessors, (6077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 6077 transitions. [2021-06-05 22:31:41,332 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 6077 transitions. Word has length 32 [2021-06-05 22:31:41,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:41,332 INFO L482 AbstractCegarLoop]: Abstraction has 2440 states and 6077 transitions. [2021-06-05 22:31:41,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 6077 transitions. [2021-06-05 22:31:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:41,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:41,334 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:41,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 22:31:41,535 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:41,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1535023234, now seen corresponding path program 201 times [2021-06-05 22:31:41,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:41,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026737644] [2021-06-05 22:31:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026737644] [2021-06-05 22:31:41,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026737644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337970701] [2021-06-05 22:31:41,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:41,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:31:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337970701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:42,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:42,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:42,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940969464] [2021-06-05 22:31:42,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:42,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:42,208 INFO L87 Difference]: Start difference. First operand 2440 states and 6077 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:43,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:43,112 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-06-05 22:31:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:31:43,113 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:43,115 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 22:31:43,115 INFO L226 Difference]: Without dead ends: 2688 [2021-06-05 22:31:43,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1232.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:31:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-05 22:31:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2448. [2021-06-05 22:31:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 22:31:43,134 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 22:31:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:43,134 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 22:31:43,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 22:31:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:43,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:43,136 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:43,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 22:31:43,337 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash -275884870, now seen corresponding path program 202 times [2021-06-05 22:31:43,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:43,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496266140] [2021-06-05 22:31:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:43,585 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:43,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496266140] [2021-06-05 22:31:43,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496266140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155908438] [2021-06-05 22:31:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:43,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:43,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:43,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155908438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:44,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119420816] [2021-06-05 22:31:44,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:44,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:44,035 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:44,734 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 22:31:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:44,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:44,736 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 22:31:44,736 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 22:31:44,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1078.8ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 22:31:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2456. [2021-06-05 22:31:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 22:31:44,754 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 22:31:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:44,754 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 22:31:44,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 22:31:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:44,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:44,756 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:44,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3111 [2021-06-05 22:31:44,957 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:44,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:44,957 INFO L82 PathProgramCache]: Analyzing trace with hash -88194570, now seen corresponding path program 203 times [2021-06-05 22:31:44,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:44,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957755637] [2021-06-05 22:31:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957755637] [2021-06-05 22:31:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957755637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371071690] [2021-06-05 22:31:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:45,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:31:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 22:31:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:45,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371071690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:45,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:45,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:45,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634976019] [2021-06-05 22:31:45,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:45,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:45,487 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:45,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:45,985 INFO L93 Difference]: Finished difference Result 2710 states and 6732 transitions. [2021-06-05 22:31:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:31:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:45,987 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 22:31:45,988 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 22:31:45,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 739.1ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:31:45,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 22:31:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2424. [2021-06-05 22:31:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 22:31:46,008 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 22:31:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:46,008 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 22:31:46,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 22:31:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:46,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:46,010 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:46,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3128,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:46,210 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:46,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1304237626, now seen corresponding path program 204 times [2021-06-05 22:31:46,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:46,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482215808] [2021-06-05 22:31:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482215808] [2021-06-05 22:31:46,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482215808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209718862] [2021-06-05 22:31:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:46,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 22:31:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:46,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:46,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:46,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209718862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:46,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:46,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:46,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129428234] [2021-06-05 22:31:46,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:46,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:46,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:46,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:46,941 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:47,776 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 22:31:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:31:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:47,779 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 22:31:47,779 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 22:31:47,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1247.3ms TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:31:47,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 22:31:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2432. [2021-06-05 22:31:47,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 2.4915672562731386) internal successors, (6057), 2431 states have internal predecessors, (6057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:47,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6057 transitions. [2021-06-05 22:31:47,799 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6057 transitions. Word has length 32 [2021-06-05 22:31:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:47,799 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 6057 transitions. [2021-06-05 22:31:47,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6057 transitions. [2021-06-05 22:31:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:47,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:47,801 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:48,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3143,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:48,002 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash -426532106, now seen corresponding path program 205 times [2021-06-05 22:31:48,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:48,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035921837] [2021-06-05 22:31:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:48,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035921837] [2021-06-05 22:31:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035921837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112814402] [2021-06-05 22:31:48,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:48,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112814402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:48,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:48,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:48,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578217341] [2021-06-05 22:31:48,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:48,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:48,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:48,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:48,746 INFO L87 Difference]: Start difference. First operand 2432 states and 6057 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:49,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:49,518 INFO L93 Difference]: Finished difference Result 2662 states and 6616 transitions. [2021-06-05 22:31:49,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:49,518 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:49,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:49,520 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 22:31:49,520 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 22:31:49,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1193.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 22:31:49,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2424. [2021-06-05 22:31:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 22:31:49,560 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 22:31:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:49,560 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 22:31:49,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 22:31:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:49,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:49,562 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:49,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3161 [2021-06-05 22:31:49,762 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1644562630, now seen corresponding path program 206 times [2021-06-05 22:31:49,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:49,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785399360] [2021-06-05 22:31:49,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:50,157 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 17 [2021-06-05 22:31:50,419 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-06-05 22:31:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:50,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785399360] [2021-06-05 22:31:50,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785399360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623128295] [2021-06-05 22:31:50,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:50,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:50,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:50,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623128295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:50,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:50,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886780936] [2021-06-05 22:31:50,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:50,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:50,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:50,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:50,944 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:51,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:51,652 INFO L93 Difference]: Finished difference Result 2742 states and 6808 transitions. [2021-06-05 22:31:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:51,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:51,654 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 22:31:51,654 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 22:31:51,655 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1021.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:51,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 22:31:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2424. [2021-06-05 22:31:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.491539413949649) internal successors, (6037), 2423 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6037 transitions. [2021-06-05 22:31:51,675 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6037 transitions. Word has length 32 [2021-06-05 22:31:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 2424 states and 6037 transitions. [2021-06-05 22:31:51,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6037 transitions. [2021-06-05 22:31:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:51,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:51,677 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:51,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:51,878 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash -369420230, now seen corresponding path program 207 times [2021-06-05 22:31:51,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:51,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115691607] [2021-06-05 22:31:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:52,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:52,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115691607] [2021-06-05 22:31:52,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115691607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:52,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126054030] [2021-06-05 22:31:52,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:52,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:31:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:52,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126054030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:52,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:52,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:52,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193861014] [2021-06-05 22:31:52,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:52,458 INFO L87 Difference]: Start difference. First operand 2424 states and 6037 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:53,082 INFO L93 Difference]: Finished difference Result 2678 states and 6644 transitions. [2021-06-05 22:31:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:31:53,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:53,084 INFO L225 Difference]: With dead ends: 2678 [2021-06-05 22:31:53,084 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 22:31:53,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 909.7ms TimeCoverageRelationStatistics Valid=295, Invalid=1427, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:31:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 22:31:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2456. [2021-06-05 22:31:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 22:31:53,105 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 22:31:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:53,105 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 22:31:53,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 22:31:53,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:53,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:53,107 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:53,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3198 [2021-06-05 22:31:53,308 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:53,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2100189962, now seen corresponding path program 208 times [2021-06-05 22:31:53,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:53,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709596155] [2021-06-05 22:31:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:53,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709596155] [2021-06-05 22:31:53,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709596155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532033028] [2021-06-05 22:31:53,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:53,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:53,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:53,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532033028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:53,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:53,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537687000] [2021-06-05 22:31:53,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:53,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:53,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:53,876 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:54,436 INFO L93 Difference]: Finished difference Result 2646 states and 6576 transitions. [2021-06-05 22:31:54,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:54,437 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:54,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:54,438 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 22:31:54,439 INFO L226 Difference]: Without dead ends: 2624 [2021-06-05 22:31:54,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2021-06-05 22:31:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 2448. [2021-06-05 22:31:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 22:31:54,459 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 22:31:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:54,459 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 22:31:54,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 22:31:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:54,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:54,461 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:54,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:54,663 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:54,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1988838902, now seen corresponding path program 209 times [2021-06-05 22:31:54,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:54,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049712365] [2021-06-05 22:31:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:54,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:54,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049712365] [2021-06-05 22:31:54,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049712365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:54,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517231970] [2021-06-05 22:31:54,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:54,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:31:54,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:54,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:54,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517231970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:55,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:55,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:55,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950633934] [2021-06-05 22:31:55,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:55,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:55,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:55,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:55,205 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:55,713 INFO L93 Difference]: Finished difference Result 2702 states and 6708 transitions. [2021-06-05 22:31:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:55,713 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:55,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:55,715 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 22:31:55,715 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 22:31:55,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 22:31:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2456. [2021-06-05 22:31:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 22:31:55,735 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 22:31:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:55,735 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 22:31:55,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 22:31:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:55,736 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:55,736 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:55,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:55,937 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2118438094, now seen corresponding path program 210 times [2021-06-05 22:31:55,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:55,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929156444] [2021-06-05 22:31:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:56,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929156444] [2021-06-05 22:31:56,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929156444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35557404] [2021-06-05 22:31:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:56,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:31:56,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:56,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:56,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35557404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:56,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:56,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400121890] [2021-06-05 22:31:56,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:56,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:56,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:56,599 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:57,249 INFO L93 Difference]: Finished difference Result 2718 states and 6744 transitions. [2021-06-05 22:31:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:31:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:57,252 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 22:31:57,252 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 22:31:57,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1026.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 22:31:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2448. [2021-06-05 22:31:57,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 22:31:57,273 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 22:31:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:57,273 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 22:31:57,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 22:31:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:57,275 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:57,275 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:57,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3246 [2021-06-05 22:31:57,476 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash 373114870, now seen corresponding path program 211 times [2021-06-05 22:31:57,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:57,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791242539] [2021-06-05 22:31:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:57,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:57,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791242539] [2021-06-05 22:31:57,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791242539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:57,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041752870] [2021-06-05 22:31:57,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:57,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041752870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:57,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:57,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:31:57,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523217707] [2021-06-05 22:31:57,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:57,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:57,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:57,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:57,992 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:58,501 INFO L93 Difference]: Finished difference Result 2606 states and 6468 transitions. [2021-06-05 22:31:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:31:58,501 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:31:58,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:58,503 INFO L225 Difference]: With dead ends: 2606 [2021-06-05 22:31:58,503 INFO L226 Difference]: Without dead ends: 2568 [2021-06-05 22:31:58,504 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=304, Invalid=1256, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-06-05 22:31:58,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 2448. [2021-06-05 22:31:58,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.491622394769105) internal successors, (6097), 2447 states have internal predecessors, (6097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:58,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6097 transitions. [2021-06-05 22:31:58,522 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6097 transitions. Word has length 32 [2021-06-05 22:31:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:58,522 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6097 transitions. [2021-06-05 22:31:58,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:31:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6097 transitions. [2021-06-05 22:31:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:31:58,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:58,524 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:58,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-06-05 22:31:58,724 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1629648834, now seen corresponding path program 212 times [2021-06-05 22:31:58,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:58,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676488958] [2021-06-05 22:31:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:59,303 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-06-05 22:31:59,505 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 19 [2021-06-05 22:31:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:59,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:59,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676488958] [2021-06-05 22:31:59,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676488958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:59,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704103960] [2021-06-05 22:31:59,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:59,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:59,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:59,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:31:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704103960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:00,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:00,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:00,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239207357] [2021-06-05 22:32:00,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:00,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:00,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:00,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:00,071 INFO L87 Difference]: Start difference. First operand 2448 states and 6097 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:00,896 INFO L93 Difference]: Finished difference Result 2598 states and 6448 transitions. [2021-06-05 22:32:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:00,898 INFO L225 Difference]: With dead ends: 2598 [2021-06-05 22:32:00,898 INFO L226 Difference]: Without dead ends: 2560 [2021-06-05 22:32:00,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1214.6ms TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-06-05 22:32:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2456. [2021-06-05 22:32:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2456 states, 2455 states have (on average 2.4916496945010183) internal successors, (6117), 2455 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 6117 transitions. [2021-06-05 22:32:00,918 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 6117 transitions. Word has length 32 [2021-06-05 22:32:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:00,918 INFO L482 AbstractCegarLoop]: Abstraction has 2456 states and 6117 transitions. [2021-06-05 22:32:00,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 6117 transitions. [2021-06-05 22:32:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:00,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:00,920 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:01,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:01,120 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1611400702, now seen corresponding path program 213 times [2021-06-05 22:32:01,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:01,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739760662] [2021-06-05 22:32:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:02,124 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 16 [2021-06-05 22:32:02,608 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 10 [2021-06-05 22:32:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:02,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739760662] [2021-06-05 22:32:02,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739760662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866414506] [2021-06-05 22:32:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:02,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:32:02,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:02,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:03,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866414506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:03,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:03,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:03,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005035167] [2021-06-05 22:32:03,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:03,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:03,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:03,172 INFO L87 Difference]: Start difference. First operand 2456 states and 6117 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:03,836 INFO L93 Difference]: Finished difference Result 2694 states and 6688 transitions. [2021-06-05 22:32:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:03,839 INFO L225 Difference]: With dead ends: 2694 [2021-06-05 22:32:03,839 INFO L226 Difference]: Without dead ends: 2656 [2021-06-05 22:32:03,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1016.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:32:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-06-05 22:32:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2480. [2021-06-05 22:32:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2479 states have (on average 2.491730536506656) internal successors, (6177), 2479 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 6177 transitions. [2021-06-05 22:32:03,858 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 6177 transitions. Word has length 32 [2021-06-05 22:32:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:03,858 INFO L482 AbstractCegarLoop]: Abstraction has 2480 states and 6177 transitions. [2021-06-05 22:32:03,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 6177 transitions. [2021-06-05 22:32:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:03,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:03,860 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:04,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:04,061 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash -645396866, now seen corresponding path program 214 times [2021-06-05 22:32:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:04,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790999379] [2021-06-05 22:32:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:04,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790999379] [2021-06-05 22:32:04,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790999379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104091724] [2021-06-05 22:32:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:04,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:04,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:04,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:04,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104091724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:04,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:04,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579632464] [2021-06-05 22:32:04,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:04,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:04,728 INFO L87 Difference]: Start difference. First operand 2480 states and 6177 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:05,264 INFO L93 Difference]: Finished difference Result 2622 states and 6508 transitions. [2021-06-05 22:32:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:32:05,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:05,266 INFO L225 Difference]: With dead ends: 2622 [2021-06-05 22:32:05,266 INFO L226 Difference]: Without dead ends: 2584 [2021-06-05 22:32:05,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:32:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2021-06-05 22:32:05,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 2488. [2021-06-05 22:32:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-06-05 22:32:05,285 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-06-05 22:32:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:05,285 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-06-05 22:32:05,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-06-05 22:32:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:05,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:05,287 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:05,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:05,487 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash -457706566, now seen corresponding path program 215 times [2021-06-05 22:32:05,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:05,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383965530] [2021-06-05 22:32:05,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:05,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383965530] [2021-06-05 22:32:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383965530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588864625] [2021-06-05 22:32:05,693 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:05,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:32:05,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:05,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:05,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:06,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588864625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:06,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:06,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:06,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849940980] [2021-06-05 22:32:06,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:06,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:06,182 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:06,842 INFO L93 Difference]: Finished difference Result 2758 states and 6852 transitions. [2021-06-05 22:32:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:06,844 INFO L225 Difference]: With dead ends: 2758 [2021-06-05 22:32:06,844 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 22:32:06,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1083.1ms TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 22:32:06,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2488. [2021-06-05 22:32:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.4917571371129874) internal successors, (6197), 2487 states have internal predecessors, (6197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6197 transitions. [2021-06-05 22:32:06,864 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6197 transitions. Word has length 32 [2021-06-05 22:32:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:06,864 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6197 transitions. [2021-06-05 22:32:06,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6197 transitions. [2021-06-05 22:32:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:06,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:06,866 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:07,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:07,066 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:07,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1254815034, now seen corresponding path program 216 times [2021-06-05 22:32:07,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:07,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10210968] [2021-06-05 22:32:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:07,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:07,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10210968] [2021-06-05 22:32:07,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10210968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:07,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171125249] [2021-06-05 22:32:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:07,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:32:07,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:07,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171125249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:07,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:07,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:07,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095102540] [2021-06-05 22:32:07,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:07,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:07,709 INFO L87 Difference]: Start difference. First operand 2488 states and 6197 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:08,470 INFO L93 Difference]: Finished difference Result 2710 states and 6728 transitions. [2021-06-05 22:32:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:32:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:08,473 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 22:32:08,473 INFO L226 Difference]: Without dead ends: 2672 [2021-06-05 22:32:08,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1090.6ms TimeCoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:32:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-06-05 22:32:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2504. [2021-06-05 22:32:08,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2504 states, 2503 states have (on average 2.4918098282061525) internal successors, (6237), 2503 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2504 states to 2504 states and 6237 transitions. [2021-06-05 22:32:08,493 INFO L78 Accepts]: Start accepts. Automaton has 2504 states and 6237 transitions. Word has length 32 [2021-06-05 22:32:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:08,493 INFO L482 AbstractCegarLoop]: Abstraction has 2504 states and 6237 transitions. [2021-06-05 22:32:08,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2504 states and 6237 transitions. [2021-06-05 22:32:08,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:08,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:08,495 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:08,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-06-05 22:32:08,695 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:08,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:08,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1746761730, now seen corresponding path program 217 times [2021-06-05 22:32:08,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:08,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266272126] [2021-06-05 22:32:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:09,450 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 17 [2021-06-05 22:32:15,771 WARN L205 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2021-06-05 22:32:17,887 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 70 DAG size of output: 17 [2021-06-05 22:32:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:17,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:17,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266272126] [2021-06-05 22:32:17,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266272126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:17,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867986113] [2021-06-05 22:32:17,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:18,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867986113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:18,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:18,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009435157] [2021-06-05 22:32:18,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:18,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:18,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:18,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:18,475 INFO L87 Difference]: Start difference. First operand 2504 states and 6237 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:19,086 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-06-05 22:32:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:19,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:19,088 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 22:32:19,088 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 22:32:19,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 965.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 22:32:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2520. [2021-06-05 22:32:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-06-05 22:32:19,110 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-06-05 22:32:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:19,110 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-06-05 22:32:19,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-06-05 22:32:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:19,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:19,112 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:19,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-06-05 22:32:19,313 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash 817435834, now seen corresponding path program 218 times [2021-06-05 22:32:19,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:19,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058471783] [2021-06-05 22:32:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:19,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058471783] [2021-06-05 22:32:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058471783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590953178] [2021-06-05 22:32:19,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:19,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:19,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:19,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:20,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590953178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:20,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:20,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:20,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088818729] [2021-06-05 22:32:20,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:20,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:20,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:20,209 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:20,988 INFO L93 Difference]: Finished difference Result 2750 states and 6832 transitions. [2021-06-05 22:32:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:32:20,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:20,990 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 22:32:20,990 INFO L226 Difference]: Without dead ends: 2720 [2021-06-05 22:32:20,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1189.3ms TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:32:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-05 22:32:21,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2520. [2021-06-05 22:32:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2519 states have (on average 2.4918618499404523) internal successors, (6277), 2519 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 6277 transitions. [2021-06-05 22:32:21,015 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 6277 transitions. Word has length 32 [2021-06-05 22:32:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:21,015 INFO L482 AbstractCegarLoop]: Abstraction has 2520 states and 6277 transitions. [2021-06-05 22:32:21,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 6277 transitions. [2021-06-05 22:32:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:21,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:21,017 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:21,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:21,217 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:21,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:21,217 INFO L82 PathProgramCache]: Analyzing trace with hash -647640962, now seen corresponding path program 219 times [2021-06-05 22:32:21,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:21,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94093447] [2021-06-05 22:32:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:21,358 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:21,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94093447] [2021-06-05 22:32:21,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94093447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136865517] [2021-06-05 22:32:21,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:21,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:32:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:32:21,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136865517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:21,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:21,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964582365] [2021-06-05 22:32:21,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:21,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:21,757 INFO L87 Difference]: Start difference. First operand 2520 states and 6277 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:22,386 INFO L93 Difference]: Finished difference Result 2734 states and 6792 transitions. [2021-06-05 22:32:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:22,388 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 22:32:22,388 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 22:32:22,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 22:32:22,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2528. [2021-06-05 22:32:22,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.4918876137712704) internal successors, (6297), 2527 states have internal predecessors, (6297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6297 transitions. [2021-06-05 22:32:22,410 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6297 transitions. Word has length 32 [2021-06-05 22:32:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:22,410 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6297 transitions. [2021-06-05 22:32:22,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6297 transitions. [2021-06-05 22:32:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:22,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:22,412 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:22,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:22,612 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 611497402, now seen corresponding path program 220 times [2021-06-05 22:32:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:22,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135157329] [2021-06-05 22:32:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:22,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:22,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135157329] [2021-06-05 22:32:22,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135157329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:22,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496164342] [2021-06-05 22:32:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:22,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:22,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:22,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:22,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:23,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496164342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:23,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:23,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:23,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941091324] [2021-06-05 22:32:23,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:23,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:23,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:23,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:23,422 INFO L87 Difference]: Start difference. First operand 2528 states and 6297 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:24,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:24,137 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-06-05 22:32:24,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:24,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:24,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:24,140 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 22:32:24,140 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 22:32:24,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 22:32:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2544. [2021-06-05 22:32:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2544 states, 2543 states have (on average 2.491938655131734) internal successors, (6337), 2543 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2544 states to 2544 states and 6337 transitions. [2021-06-05 22:32:24,161 INFO L78 Accepts]: Start accepts. Automaton has 2544 states and 6337 transitions. Word has length 32 [2021-06-05 22:32:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:24,161 INFO L482 AbstractCegarLoop]: Abstraction has 2544 states and 6337 transitions. [2021-06-05 22:32:24,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:24,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2544 states and 6337 transitions. [2021-06-05 22:32:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:24,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:24,163 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:24,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-06-05 22:32:24,363 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:24,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 799187702, now seen corresponding path program 221 times [2021-06-05 22:32:24,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:24,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091570720] [2021-06-05 22:32:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:24,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091570720] [2021-06-05 22:32:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091570720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625371160] [2021-06-05 22:32:24,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:24,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:32:24,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:25,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625371160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:25,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:25,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:25,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941822509] [2021-06-05 22:32:25,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:25,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:25,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:25,051 INFO L87 Difference]: Start difference. First operand 2544 states and 6337 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:25,746 INFO L93 Difference]: Finished difference Result 2718 states and 6752 transitions. [2021-06-05 22:32:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:25,749 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 22:32:25,749 INFO L226 Difference]: Without dead ends: 2688 [2021-06-05 22:32:25,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1083.5ms TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-06-05 22:32:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 2552. [2021-06-05 22:32:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-06-05 22:32:25,769 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-06-05 22:32:25,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:25,769 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-06-05 22:32:25,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:25,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-06-05 22:32:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:25,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:25,771 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:25,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:25,971 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2103347398, now seen corresponding path program 222 times [2021-06-05 22:32:25,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:25,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627430023] [2021-06-05 22:32:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:26,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627430023] [2021-06-05 22:32:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627430023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298300891] [2021-06-05 22:32:26,154 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:26,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 22:32:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:26,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298300891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:26,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835525825] [2021-06-05 22:32:26,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:26,690 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:27,545 INFO L93 Difference]: Finished difference Result 2814 states and 6992 transitions. [2021-06-05 22:32:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:27,546 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:27,548 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 22:32:27,548 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 22:32:27,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1249.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 22:32:27,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2568. [2021-06-05 22:32:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-06-05 22:32:27,569 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-06-05 22:32:27,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:27,569 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-06-05 22:32:27,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-06-05 22:32:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:27,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:27,571 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:27,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3457 [2021-06-05 22:32:27,772 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash 460850166, now seen corresponding path program 223 times [2021-06-05 22:32:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:27,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254082931] [2021-06-05 22:32:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:27,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254082931] [2021-06-05 22:32:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254082931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860486954] [2021-06-05 22:32:27,926 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:27,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:28,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860486954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:28,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:28,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:28,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397754919] [2021-06-05 22:32:28,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:28,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:28,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:28,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:28,438 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:29,121 INFO L93 Difference]: Finished difference Result 2798 states and 6956 transitions. [2021-06-05 22:32:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:32:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:29,124 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 22:32:29,124 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 22:32:29,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1052.8ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:32:29,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 22:32:29,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2552. [2021-06-05 22:32:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 2.491963935711486) internal successors, (6357), 2551 states have internal predecessors, (6357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 6357 transitions. [2021-06-05 22:32:29,146 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 6357 transitions. Word has length 32 [2021-06-05 22:32:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:29,146 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 6357 transitions. [2021-06-05 22:32:29,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 6357 transitions. [2021-06-05 22:32:29,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:29,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:29,148 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:29,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,348 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:29,349 INFO L82 PathProgramCache]: Analyzing trace with hash 698526078, now seen corresponding path program 224 times [2021-06-05 22:32:29,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:29,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178899563] [2021-06-05 22:32:29,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:29,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178899563] [2021-06-05 22:32:29,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178899563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423595486] [2021-06-05 22:32:29,548 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:29,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423595486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:29,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:29,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069373080] [2021-06-05 22:32:29,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:29,953 INFO L87 Difference]: Start difference. First operand 2552 states and 6357 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:30,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:30,585 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 22:32:30,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:30,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:30,588 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 22:32:30,588 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 22:32:30,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 22:32:30,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2576. [2021-06-05 22:32:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.4920388349514564) internal successors, (6417), 2575 states have internal predecessors, (6417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 6417 transitions. [2021-06-05 22:32:30,609 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 6417 transitions. Word has length 32 [2021-06-05 22:32:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:30,609 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 6417 transitions. [2021-06-05 22:32:30,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 6417 transitions. [2021-06-05 22:32:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:30,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:30,611 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:30,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:30,811 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2145354742, now seen corresponding path program 225 times [2021-06-05 22:32:30,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:30,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190785718] [2021-06-05 22:32:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:30,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190785718] [2021-06-05 22:32:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190785718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233213934] [2021-06-05 22:32:30,964 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:30,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 22:32:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:31,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233213934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:31,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:31,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:31,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118869751] [2021-06-05 22:32:31,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:31,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:31,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:31,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:31,412 INFO L87 Difference]: Start difference. First operand 2576 states and 6417 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:32,010 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 22:32:32,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:32,011 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:32,013 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 22:32:32,013 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 22:32:32,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 873.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 22:32:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2568. [2021-06-05 22:32:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.4920140241527076) internal successors, (6397), 2567 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 6397 transitions. [2021-06-05 22:32:32,032 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 6397 transitions. Word has length 32 [2021-06-05 22:32:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:32,033 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 6397 transitions. [2021-06-05 22:32:32,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:32,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 6397 transitions. [2021-06-05 22:32:32,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:32,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:32,034 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:32,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:32,235 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:32,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1619326906, now seen corresponding path program 226 times [2021-06-05 22:32:32,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:32,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284642493] [2021-06-05 22:32:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:32,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284642493] [2021-06-05 22:32:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284642493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:32,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317210719] [2021-06-05 22:32:32,442 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:32,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:32,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:32,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317210719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:32,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:32,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307339264] [2021-06-05 22:32:32,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:32,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:32,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:32,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:32,807 INFO L87 Difference]: Start difference. First operand 2568 states and 6397 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:33,717 INFO L93 Difference]: Finished difference Result 2886 states and 7172 transitions. [2021-06-05 22:32:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:32:33,717 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:33,720 INFO L225 Difference]: With dead ends: 2886 [2021-06-05 22:32:33,720 INFO L226 Difference]: Without dead ends: 2856 [2021-06-05 22:32:33,720 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1061.8ms TimeCoverageRelationStatistics Valid=405, Invalid=1851, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:32:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-05 22:32:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2600. [2021-06-05 22:32:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 22:32:33,741 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 22:32:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:33,742 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 22:32:33,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 22:32:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:33,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:33,743 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:33,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:33,945 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:33,945 INFO L82 PathProgramCache]: Analyzing trace with hash -757180358, now seen corresponding path program 227 times [2021-06-05 22:32:33,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:33,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789571060] [2021-06-05 22:32:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789571060] [2021-06-05 22:32:34,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789571060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842023732] [2021-06-05 22:32:34,159 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:34,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 22:32:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:34,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:34,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842023732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:34,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:34,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509110940] [2021-06-05 22:32:34,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:34,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:34,661 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:35,412 INFO L93 Difference]: Finished difference Result 2910 states and 7232 transitions. [2021-06-05 22:32:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:35,414 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 22:32:35,415 INFO L226 Difference]: Without dead ends: 2880 [2021-06-05 22:32:35,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1086.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-06-05 22:32:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2616. [2021-06-05 22:32:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:35,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 22:32:35,437 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 22:32:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:35,437 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 22:32:35,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 22:32:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:35,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:35,439 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:35,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:35,640 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:35,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1807017206, now seen corresponding path program 228 times [2021-06-05 22:32:35,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:35,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128881965] [2021-06-05 22:32:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:35,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128881965] [2021-06-05 22:32:35,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128881965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:35,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066338532] [2021-06-05 22:32:35,839 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:35,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:32:35,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:35,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:36,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066338532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:36,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:36,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:36,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841611533] [2021-06-05 22:32:36,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:36,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:36,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:36,344 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:37,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:37,046 INFO L93 Difference]: Finished difference Result 2894 states and 7196 transitions. [2021-06-05 22:32:37,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:37,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:37,049 INFO L225 Difference]: With dead ends: 2894 [2021-06-05 22:32:37,049 INFO L226 Difference]: Without dead ends: 2872 [2021-06-05 22:32:37,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1059.8ms TimeCoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-06-05 22:32:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2600. [2021-06-05 22:32:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:37,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 22:32:37,071 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 22:32:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:37,071 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 22:32:37,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 22:32:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:37,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:37,073 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:37,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:37,274 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 517962042, now seen corresponding path program 229 times [2021-06-05 22:32:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:37,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639903034] [2021-06-05 22:32:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:37,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639903034] [2021-06-05 22:32:37,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639903034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:37,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696913343] [2021-06-05 22:32:37,456 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:37,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:37,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696913343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:37,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:37,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:37,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723851784] [2021-06-05 22:32:37,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:37,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:37,957 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:38,630 INFO L93 Difference]: Finished difference Result 2822 states and 7008 transitions. [2021-06-05 22:32:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:38,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:38,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:38,634 INFO L225 Difference]: With dead ends: 2822 [2021-06-05 22:32:38,634 INFO L226 Difference]: Without dead ends: 2784 [2021-06-05 22:32:38,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1033.2ms TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-06-05 22:32:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2600. [2021-06-05 22:32:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 22:32:38,666 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 22:32:38,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:38,666 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 22:32:38,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 22:32:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:38,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:38,668 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:38,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:38,868 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:38,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1231055822, now seen corresponding path program 230 times [2021-06-05 22:32:38,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:38,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972348497] [2021-06-05 22:32:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:39,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:39,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972348497] [2021-06-05 22:32:39,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972348497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:39,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655481996] [2021-06-05 22:32:39,053 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:39,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:39,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:39,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655481996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:39,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:39,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:39,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406480570] [2021-06-05 22:32:39,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:39,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:39,499 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:40,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:40,192 INFO L93 Difference]: Finished difference Result 2926 states and 7264 transitions. [2021-06-05 22:32:40,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:40,192 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:40,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:40,194 INFO L225 Difference]: With dead ends: 2926 [2021-06-05 22:32:40,194 INFO L226 Difference]: Without dead ends: 2880 [2021-06-05 22:32:40,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1016.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2021-06-05 22:32:40,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2600. [2021-06-05 22:32:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:40,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 22:32:40,217 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 22:32:40,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:40,217 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 22:32:40,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 22:32:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:40,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:40,219 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:40,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3630,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:40,419 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:40,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1260497142, now seen corresponding path program 231 times [2021-06-05 22:32:40,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:40,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788588043] [2021-06-05 22:32:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788588043] [2021-06-05 22:32:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788588043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770233981] [2021-06-05 22:32:40,596 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:40,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 22:32:40,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770233981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:40,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:40,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660430983] [2021-06-05 22:32:40,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:40,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:40,970 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:41,546 INFO L93 Difference]: Finished difference Result 2782 states and 6908 transitions. [2021-06-05 22:32:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:41,549 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 22:32:41,549 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 22:32:41,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 22:32:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2600. [2021-06-05 22:32:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2599 states have (on average 2.492112350904194) internal successors, (6477), 2599 states have internal predecessors, (6477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 6477 transitions. [2021-06-05 22:32:41,568 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 6477 transitions. Word has length 32 [2021-06-05 22:32:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:41,569 INFO L482 AbstractCegarLoop]: Abstraction has 2600 states and 6477 transitions. [2021-06-05 22:32:41,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 6477 transitions. [2021-06-05 22:32:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:41,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:41,570 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:41,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3662,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:41,771 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1455933510, now seen corresponding path program 232 times [2021-06-05 22:32:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035524176] [2021-06-05 22:32:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:42,027 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 10 [2021-06-05 22:32:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:42,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:42,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035524176] [2021-06-05 22:32:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035524176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:42,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627345705] [2021-06-05 22:32:42,127 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:42,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:42,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627345705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:42,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:42,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:42,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340991188] [2021-06-05 22:32:42,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:42,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:42,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:42,521 INFO L87 Difference]: Start difference. First operand 2600 states and 6477 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:43,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:43,231 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-06-05 22:32:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:32:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:43,233 INFO L225 Difference]: With dead ends: 2806 [2021-06-05 22:32:43,233 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 22:32:43,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 899.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:32:43,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 22:32:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2624. [2021-06-05 22:32:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 22:32:43,254 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 22:32:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:43,254 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 22:32:43,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 22:32:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:43,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:43,256 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:43,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 22:32:43,457 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 462526522, now seen corresponding path program 233 times [2021-06-05 22:32:43,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:43,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987126572] [2021-06-05 22:32:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:43,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:43,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987126572] [2021-06-05 22:32:43,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987126572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:43,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153546752] [2021-06-05 22:32:43,648 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:43,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:32:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:44,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:44,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153546752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:44,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:44,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:44,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420487845] [2021-06-05 22:32:44,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:44,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:44,123 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:44,743 INFO L93 Difference]: Finished difference Result 2798 states and 6948 transitions. [2021-06-05 22:32:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:44,746 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 22:32:44,746 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 22:32:44,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 22:32:44,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-06-05 22:32:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 22:32:44,781 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 22:32:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:44,781 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 22:32:44,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 22:32:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:44,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:44,783 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:44,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:44,983 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash 124188986, now seen corresponding path program 234 times [2021-06-05 22:32:44,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:44,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788999331] [2021-06-05 22:32:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:45,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788999331] [2021-06-05 22:32:45,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788999331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:45,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447461806] [2021-06-05 22:32:45,193 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:45,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 22:32:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447461806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:45,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:45,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555423240] [2021-06-05 22:32:45,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:45,676 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:46,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:46,423 INFO L93 Difference]: Finished difference Result 2894 states and 7192 transitions. [2021-06-05 22:32:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:32:46,424 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:46,426 INFO L225 Difference]: With dead ends: 2894 [2021-06-05 22:32:46,426 INFO L226 Difference]: Without dead ends: 2864 [2021-06-05 22:32:46,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1123.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2864 states. [2021-06-05 22:32:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2864 to 2640. [2021-06-05 22:32:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.4922319060250095) internal successors, (6577), 2639 states have internal predecessors, (6577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:46,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 6577 transitions. [2021-06-05 22:32:46,452 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 6577 transitions. Word has length 32 [2021-06-05 22:32:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:46,452 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 6577 transitions. [2021-06-05 22:32:46,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 6577 transitions. [2021-06-05 22:32:46,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:46,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:46,454 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:46,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3720 [2021-06-05 22:32:46,654 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:46,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:46,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1606580746, now seen corresponding path program 235 times [2021-06-05 22:32:46,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:46,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577386183] [2021-06-05 22:32:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:46,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577386183] [2021-06-05 22:32:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577386183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:46,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368921088] [2021-06-05 22:32:46,814 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:46,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:47,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368921088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:47,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:47,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:47,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266320068] [2021-06-05 22:32:47,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:47,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:47,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:47,292 INFO L87 Difference]: Start difference. First operand 2640 states and 6577 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:47,962 INFO L93 Difference]: Finished difference Result 2878 states and 7156 transitions. [2021-06-05 22:32:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:47,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:47,964 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 22:32:47,964 INFO L226 Difference]: Without dead ends: 2856 [2021-06-05 22:32:47,965 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 982.9ms TimeCoverageRelationStatistics Valid=222, Invalid=1260, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-06-05 22:32:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2616. [2021-06-05 22:32:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 22:32:47,987 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 22:32:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:47,987 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 22:32:47,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 22:32:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:47,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:47,989 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:48,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3740,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:48,189 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:48,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:48,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2103411910, now seen corresponding path program 236 times [2021-06-05 22:32:48,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:48,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933493529] [2021-06-05 22:32:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933493529] [2021-06-05 22:32:48,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933493529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638372114] [2021-06-05 22:32:48,426 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:48,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:48,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:48,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638372114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:48,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:48,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641354519] [2021-06-05 22:32:48,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:48,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:48,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:48,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:48,827 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:49,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:49,486 INFO L93 Difference]: Finished difference Result 2790 states and 6932 transitions. [2021-06-05 22:32:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:32:49,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:49,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:49,489 INFO L225 Difference]: With dead ends: 2790 [2021-06-05 22:32:49,489 INFO L226 Difference]: Without dead ends: 2760 [2021-06-05 22:32:49,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 946.9ms TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2760 states. [2021-06-05 22:32:49,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2760 to 2624. [2021-06-05 22:32:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.492184521540221) internal successors, (6537), 2623 states have internal predecessors, (6537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 6537 transitions. [2021-06-05 22:32:49,511 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 6537 transitions. Word has length 32 [2021-06-05 22:32:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:49,511 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 6537 transitions. [2021-06-05 22:32:49,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 6537 transitions. [2021-06-05 22:32:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:49,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:49,513 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:49,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3762 [2021-06-05 22:32:49,714 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1042745718, now seen corresponding path program 237 times [2021-06-05 22:32:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:49,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014371091] [2021-06-05 22:32:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014371091] [2021-06-05 22:32:49,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014371091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:49,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558984806] [2021-06-05 22:32:49,883 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:49,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 22:32:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:50,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558984806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:50,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473905901] [2021-06-05 22:32:50,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:50,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:50,268 INFO L87 Difference]: Start difference. First operand 2624 states and 6537 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:50,750 INFO L93 Difference]: Finished difference Result 2774 states and 6892 transitions. [2021-06-05 22:32:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:50,752 INFO L225 Difference]: With dead ends: 2774 [2021-06-05 22:32:50,752 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 22:32:50,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 765.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 22:32:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2632. [2021-06-05 22:32:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.492208285822881) internal successors, (6557), 2631 states have internal predecessors, (6557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6557 transitions. [2021-06-05 22:32:50,775 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6557 transitions. Word has length 32 [2021-06-05 22:32:50,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:50,775 INFO L482 AbstractCegarLoop]: Abstraction has 2632 states and 6557 transitions. [2021-06-05 22:32:50,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6557 transitions. [2021-06-05 22:32:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:50,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:50,777 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:50,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3777,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:50,977 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash -757244870, now seen corresponding path program 238 times [2021-06-05 22:32:50,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:50,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819864137] [2021-06-05 22:32:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:51,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:51,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819864137] [2021-06-05 22:32:51,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819864137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:51,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122667918] [2021-06-05 22:32:51,353 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:51,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:51,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:51,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122667918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:51,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:51,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:51,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090663796] [2021-06-05 22:32:51,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:51,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:51,723 INFO L87 Difference]: Start difference. First operand 2632 states and 6557 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:52,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:52,472 INFO L93 Difference]: Finished difference Result 2766 states and 6876 transitions. [2021-06-05 22:32:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:52,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:52,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:52,474 INFO L225 Difference]: With dead ends: 2766 [2021-06-05 22:32:52,474 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 22:32:52,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 22:32:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2616. [2021-06-05 22:32:52,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 2.4921606118546844) internal successors, (6517), 2615 states have internal predecessors, (6517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 6517 transitions. [2021-06-05 22:32:52,495 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 6517 transitions. Word has length 32 [2021-06-05 22:32:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:52,495 INFO L482 AbstractCegarLoop]: Abstraction has 2616 states and 6517 transitions. [2021-06-05 22:32:52,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 6517 transitions. [2021-06-05 22:32:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:52,497 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:52,497 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:52,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:52,697 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1906054538, now seen corresponding path program 239 times [2021-06-05 22:32:52,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:52,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611552339] [2021-06-05 22:32:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:52,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:52,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611552339] [2021-06-05 22:32:52,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611552339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:52,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450520715] [2021-06-05 22:32:52,862 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:52,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 22:32:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:52,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450520715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:53,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:53,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823294712] [2021-06-05 22:32:53,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:53,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:53,241 INFO L87 Difference]: Start difference. First operand 2616 states and 6517 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:53,805 INFO L93 Difference]: Finished difference Result 2898 states and 7143 transitions. [2021-06-05 22:32:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:32:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:53,808 INFO L225 Difference]: With dead ends: 2898 [2021-06-05 22:32:53,808 INFO L226 Difference]: Without dead ends: 2868 [2021-06-05 22:32:53,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-06-05 22:32:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2656. [2021-06-05 22:32:53,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4937853107344634) internal successors, (6621), 2655 states have internal predecessors, (6621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:53,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6621 transitions. [2021-06-05 22:32:53,830 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6621 transitions. Word has length 32 [2021-06-05 22:32:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:53,830 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6621 transitions. [2021-06-05 22:32:53,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6621 transitions. [2021-06-05 22:32:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:53,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:53,832 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:54,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:54,037 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:54,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash 639894894, now seen corresponding path program 240 times [2021-06-05 22:32:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:54,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750177349] [2021-06-05 22:32:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:54,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:54,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750177349] [2021-06-05 22:32:54,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750177349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:54,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628513155] [2021-06-05 22:32:54,219 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:54,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 22:32:54,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:54,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628513155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:54,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:54,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:54,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812623155] [2021-06-05 22:32:54,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:54,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:54,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:54,569 INFO L87 Difference]: Start difference. First operand 2656 states and 6621 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:54,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:54,995 INFO L93 Difference]: Finished difference Result 2742 states and 6812 transitions. [2021-06-05 22:32:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:32:54,995 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:54,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:54,997 INFO L225 Difference]: With dead ends: 2742 [2021-06-05 22:32:54,997 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 22:32:54,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:32:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 22:32:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2648. [2021-06-05 22:32:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 22:32:55,017 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 22:32:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:55,017 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 22:32:55,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:55,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 22:32:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:55,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:55,019 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:55,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3834 [2021-06-05 22:32:55,220 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash 468208630, now seen corresponding path program 241 times [2021-06-05 22:32:55,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:55,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697549067] [2021-06-05 22:32:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:55,609 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 13 [2021-06-05 22:32:55,764 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 10 [2021-06-05 22:32:55,948 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 9 [2021-06-05 22:32:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697549067] [2021-06-05 22:32:56,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697549067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699771450] [2021-06-05 22:32:56,026 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 22:32:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699771450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:56,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:56,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:56,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727494605] [2021-06-05 22:32:56,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:56,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:56,336 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,872 INFO L93 Difference]: Finished difference Result 2814 states and 6984 transitions. [2021-06-05 22:32:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,875 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 22:32:56,875 INFO L226 Difference]: Without dead ends: 2768 [2021-06-05 22:32:56,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 747.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-05 22:32:56,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2648. [2021-06-05 22:32:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 22:32:56,896 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 22:32:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,896 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 22:32:56,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 22:32:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:56,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,898 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:57,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3848 [2021-06-05 22:32:57,098 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:57,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1915037294, now seen corresponding path program 242 times [2021-06-05 22:32:57,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:57,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310009647] [2021-06-05 22:32:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,493 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 12 [2021-06-05 22:32:57,719 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 10 [2021-06-05 22:32:57,979 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 10 [2021-06-05 22:32:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310009647] [2021-06-05 22:32:58,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310009647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733577840] [2021-06-05 22:32:58,060 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:58,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:58,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:58,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733577840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:58,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:58,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449813377] [2021-06-05 22:32:58,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:58,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:58,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:58,405 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:58,888 INFO L93 Difference]: Finished difference Result 2806 states and 6972 transitions. [2021-06-05 22:32:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:32:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:58,891 INFO L225 Difference]: With dead ends: 2806 [2021-06-05 22:32:58,891 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 22:32:58,891 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:32:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 22:32:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2648. [2021-06-05 22:32:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 2.4922553834529655) internal successors, (6597), 2647 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:58,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 6597 transitions. [2021-06-05 22:32:58,913 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 6597 transitions. Word has length 32 [2021-06-05 22:32:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:58,913 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 6597 transitions. [2021-06-05 22:32:58,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:32:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 6597 transitions. [2021-06-05 22:32:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 22:32:58,915 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:58,915 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:59,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3863,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,116 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:59,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1558451626, now seen corresponding path program 243 times [2021-06-05 22:32:59,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:59,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503353395] [2021-06-05 22:32:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:59,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:59,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503353395] [2021-06-05 22:32:59,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503353395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:59,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638592077] [2021-06-05 22:32:59,443 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 22:32:59,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:59,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 22:32:59,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638592077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:59,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:59,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 22:32:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177801686] [2021-06-05 22:32:59,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:59,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:59,819 INFO L87 Difference]: Start difference. First operand 2648 states and 6597 transitions. Second operand has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:33:00,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:00,327 INFO L93 Difference]: Finished difference Result 2718 states and 6756 transitions. [2021-06-05 22:33:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:33:00,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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 32 [2021-06-05 22:33:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:00,330 INFO L225 Difference]: With dead ends: 2718 [2021-06-05 22:33:00,330 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 22:33:00,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:33:00,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 22:33:00,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2021-06-05 22:33:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 2655 states have (on average 2.4922787193973637) internal successors, (6617), 2655 states have internal predecessors, (6617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 6617 transitions. [2021-06-05 22:33:00,349 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 6617 transitions. Word has length 32 [2021-06-05 22:33:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:00,349 INFO L482 AbstractCegarLoop]: Abstraction has 2656 states and 6617 transitions. [2021-06-05 22:33:00,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.391304347826087) internal successors, (55), 22 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) [2021-06-05 22:33:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 6617 transitions. [2021-06-05 22:33:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 22:33:00,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:00,351 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:00,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3877 [2021-06-05 22:33:00,551 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1344530956, now seen corresponding path program 6 times [2021-06-05 22:33:00,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:00,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590701770] [2021-06-05 22:33:00,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:01,655 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 88 DAG size of output: 15 [2021-06-05 22:41:10,899 WARN L205 SmtUtils]: Spent 8.15 m on a formula simplification. DAG size of input: 115 DAG size of output: 13 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown