/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:43:42,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:43:42,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:43:42,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:43:42,246 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 [2021-03-10 22:43:42,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:43:42,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:43:42,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:43:42,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:43:42,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:43:42,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:43:42,287 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:43:42,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:43:42,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:43:42,288 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:43:42,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:43:42,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:43:42,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:43:42,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:43:42,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:43:42,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:43:42,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:43:42,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:43:42,292 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:43:42,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:43:42,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:43:42,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:43:42,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:43:42,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:43:42,592 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:43:42,593 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:43:42,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-03-10 22:43:42,595 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-03-10 22:43:42,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:43:42,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:43:42,626 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:43:42,626 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:43:42,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:43:42,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,641 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:43:42,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:43:42,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:43:42,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:43:42,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/1) ... [2021-03-10 22:43:42,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:43:42,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:43:42,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:43:42,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:43:42,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (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 [2021-03-10 22:43:42,722 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:43:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:43:42,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:43:42,723 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:43:42,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:43:42,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:43:42,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:43:42,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:43:42,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:43:42,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:43:42,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:43:42,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:43:42,724 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-10 22:43:42,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-10 22:43:42,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-10 22:43:42,725 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:43:42,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:43:42,962 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:43:42,964 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:43:42 BoogieIcfgContainer [2021-03-10 22:43:42,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:43:42,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:43:42,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:43:42,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:43:42,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:43:42" (1/2) ... [2021-03-10 22:43:42,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3946f4 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:43:42, skipping insertion in model container [2021-03-10 22:43:42,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:43:42" (2/2) ... [2021-03-10 22:43:42,969 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-03-10 22:43:42,974 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:43:42,974 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:43:42,993 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:43:42,994 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:43:43,031 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-10 22:43:43,044 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-03-10 22:43:43,058 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:43:43,059 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:43:43,059 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:43:43,059 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:43:43,059 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:43:43,059 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:43:43,059 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:43:43,059 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:43:43,067 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-03-10 22:43:43,141 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 22:43:43,164 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:43,165 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:43,165 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash 187435854, now seen corresponding path program 1 times [2021-03-10 22:43:43,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:43,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559141239] [2021-03-10 22:43:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:43,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559141239] [2021-03-10 22:43:43,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:43,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:43:43,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768876084] [2021-03-10 22:43:43,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:43:43,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:43:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:43:43,447 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:43,550 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-03-10 22:43:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:43:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 22:43:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:43,584 INFO L225 Difference]: With dead ends: 1267 [2021-03-10 22:43:43,584 INFO L226 Difference]: Without dead ends: 1056 [2021-03-10 22:43:43,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:43:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-03-10 22:43:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-03-10 22:43:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-03-10 22:43:43,734 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-03-10 22:43:43,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:43,735 INFO L480 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-03-10 22:43:43,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,735 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-03-10 22:43:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:43,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:43,739 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:43,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:43:43,739 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 801929296, now seen corresponding path program 1 times [2021-03-10 22:43:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:43,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907622750] [2021-03-10 22:43:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:43,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907622750] [2021-03-10 22:43:43,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:43,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 22:43:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562751988] [2021-03-10 22:43:43,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:43:43,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:43:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:43:43,795 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:43,928 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-03-10 22:43:43,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:43:43,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:43,937 INFO L225 Difference]: With dead ends: 1405 [2021-03-10 22:43:43,938 INFO L226 Difference]: Without dead ends: 1369 [2021-03-10 22:43:43,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:43:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-03-10 22:43:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-03-10 22:43:43,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-03-10 22:43:43,983 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-03-10 22:43:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:43,983 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-03-10 22:43:43,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-03-10 22:43:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:43,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:43,987 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:43,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:43:43,988 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2091759792, now seen corresponding path program 1 times [2021-03-10 22:43:43,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:43,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99152326] [2021-03-10 22:43:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99152326] [2021-03-10 22:43:44,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:44,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:43:44,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413770729] [2021-03-10 22:43:44,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:43:44,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:43:44,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:43:44,052 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:44,132 INFO L93 Difference]: Finished difference Result 1502 states and 5714 transitions. [2021-03-10 22:43:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:43:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:44,142 INFO L225 Difference]: With dead ends: 1502 [2021-03-10 22:43:44,143 INFO L226 Difference]: Without dead ends: 1462 [2021-03-10 22:43:44,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:43:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2021-03-10 22:43:44,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1031. [2021-03-10 22:43:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 3.8805825242718446) internal successors, (3997), 1030 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 3997 transitions. [2021-03-10 22:43:44,186 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 3997 transitions. Word has length 27 [2021-03-10 22:43:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:44,190 INFO L480 AbstractCegarLoop]: Abstraction has 1031 states and 3997 transitions. [2021-03-10 22:43:44,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 3997 transitions. [2021-03-10 22:43:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:44,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:44,194 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:44,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:43:44,194 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:44,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1641025712, now seen corresponding path program 2 times [2021-03-10 22:43:44,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:44,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013783366] [2021-03-10 22:43:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013783366] [2021-03-10 22:43:44,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:44,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 22:43:44,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153325115] [2021-03-10 22:43:44,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:43:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:44,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:43:44,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:43:44,241 INFO L87 Difference]: Start difference. First operand 1031 states and 3997 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:44,353 INFO L93 Difference]: Finished difference Result 1577 states and 5879 transitions. [2021-03-10 22:43:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:43:44,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:44,362 INFO L225 Difference]: With dead ends: 1577 [2021-03-10 22:43:44,362 INFO L226 Difference]: Without dead ends: 1565 [2021-03-10 22:43:44,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-03-10 22:43:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1019. [2021-03-10 22:43:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 3.8850687622789786) internal successors, (3955), 1018 states have internal predecessors, (3955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3955 transitions. [2021-03-10 22:43:44,399 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3955 transitions. Word has length 27 [2021-03-10 22:43:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:44,400 INFO L480 AbstractCegarLoop]: Abstraction has 1019 states and 3955 transitions. [2021-03-10 22:43:44,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3955 transitions. [2021-03-10 22:43:44,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:44,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:44,403 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:44,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:43:44,403 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-03-10 22:43:44,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:44,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91172297] [2021-03-10 22:43:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91172297] [2021-03-10 22:43:44,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:44,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 22:43:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569615322] [2021-03-10 22:43:44,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:43:44,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:44,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:43:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:43:44,439 INFO L87 Difference]: Start difference. First operand 1019 states and 3955 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:44,496 INFO L93 Difference]: Finished difference Result 1268 states and 4702 transitions. [2021-03-10 22:43:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:43:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:44,503 INFO L225 Difference]: With dead ends: 1268 [2021-03-10 22:43:44,504 INFO L226 Difference]: Without dead ends: 1186 [2021-03-10 22:43:44,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:43:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-03-10 22:43:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 897. [2021-03-10 22:43:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-03-10 22:43:44,540 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-03-10 22:43:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:44,541 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-03-10 22:43:44,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,541 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-03-10 22:43:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:44,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:44,546 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:44,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:43:44,547 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:44,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:44,547 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-03-10 22:43:44,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:44,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577124893] [2021-03-10 22:43:44,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577124893] [2021-03-10 22:43:44,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:44,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:43:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102254711] [2021-03-10 22:43:44,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:43:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:44,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:43:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:43:44,594 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:44,683 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-03-10 22:43:44,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:43:44,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:44,692 INFO L225 Difference]: With dead ends: 1772 [2021-03-10 22:43:44,693 INFO L226 Difference]: Without dead ends: 1752 [2021-03-10 22:43:44,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:43:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-03-10 22:43:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-03-10 22:43:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-03-10 22:43:44,726 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-03-10 22:43:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:44,727 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-03-10 22:43:44,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-03-10 22:43:44,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 22:43:44,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:44,730 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:44,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 22:43:44,731 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-03-10 22:43:44,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:44,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947673256] [2021-03-10 22:43:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947673256] [2021-03-10 22:43:44,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:44,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 22:43:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451881954] [2021-03-10 22:43:44,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:43:44,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:43:44,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:43:44,787 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:44,833 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-03-10 22:43:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:43:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 22:43:44,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:44,839 INFO L225 Difference]: With dead ends: 1137 [2021-03-10 22:43:44,839 INFO L226 Difference]: Without dead ends: 1137 [2021-03-10 22:43:44,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:43:44,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-03-10 22:43:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-03-10 22:43:44,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-03-10 22:43:44,858 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-03-10 22:43:44,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:44,858 INFO L480 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-03-10 22:43:44,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-03-10 22:43:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:43:44,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:44,861 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:44,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:43:44,861 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-03-10 22:43:44,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:44,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467826341] [2021-03-10 22:43:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467826341] [2021-03-10 22:43:44,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121728157] [2021-03-10 22:43:44,890 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 [2021-03-10 22:43:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:44,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:43:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:45,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:45,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-03-10 22:43:45,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115199505] [2021-03-10 22:43:45,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:43:45,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:43:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:43:45,091 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:45,190 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-03-10 22:43:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:43:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:43:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:45,198 INFO L225 Difference]: With dead ends: 1388 [2021-03-10 22:43:45,198 INFO L226 Difference]: Without dead ends: 1388 [2021-03-10 22:43:45,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-03-10 22:43:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-03-10 22:43:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-03-10 22:43:45,231 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-03-10 22:43:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:45,231 INFO L480 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-03-10 22:43:45,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-03-10 22:43:45,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-03-10 22:43:45,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:45,234 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:45,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-03-10 22:43:45,451 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-03-10 22:43:45,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:45,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773028421] [2021-03-10 22:43:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773028421] [2021-03-10 22:43:45,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:43:45,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:43:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730424569] [2021-03-10 22:43:45,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:43:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:43:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:43:45,484 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:45,537 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-03-10 22:43:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:43:45,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-03-10 22:43:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:45,543 INFO L225 Difference]: With dead ends: 1113 [2021-03-10 22:43:45,543 INFO L226 Difference]: Without dead ends: 1113 [2021-03-10 22:43:45,548 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:43:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-03-10 22:43:45,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-03-10 22:43:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-03-10 22:43:45,576 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-03-10 22:43:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:45,577 INFO L480 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-03-10 22:43:45,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-03-10 22:43:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:43:45,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:45,580 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:45,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-10 22:43:45,581 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-03-10 22:43:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:45,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227745564] [2021-03-10 22:43:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227745564] [2021-03-10 22:43:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012628125] [2021-03-10 22:43:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:43:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:45,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:43:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:45,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:45,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-10 22:43:45,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108501618] [2021-03-10 22:43:45,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:43:45,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:43:45,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:43:45,803 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:45,873 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-03-10 22:43:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:43:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-10 22:43:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:45,893 INFO L225 Difference]: With dead ends: 1404 [2021-03-10 22:43:45,893 INFO L226 Difference]: Without dead ends: 1404 [2021-03-10 22:43:45,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:43:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-03-10 22:43:45,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-03-10 22:43:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-03-10 22:43:45,924 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-03-10 22:43:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:45,926 INFO L480 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-03-10 22:43:45,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-03-10 22:43:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 22:43:45,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:45,929 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:46,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 22:43:46,143 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:46,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:46,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-03-10 22:43:46,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:46,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810291977] [2021-03-10 22:43:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:46,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810291977] [2021-03-10 22:43:46,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160375971] [2021-03-10 22:43:46,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:46,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:43:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-10 22:43:46,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:46,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 22:43:46,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-03-10 22:43:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891678637] [2021-03-10 22:43:46,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:43:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:43:46,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:43:46,315 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2021-03-10 22:43:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:46,369 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-03-10 22:43:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:43:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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 31 [2021-03-10 22:43:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:46,373 INFO L225 Difference]: With dead ends: 1123 [2021-03-10 22:43:46,374 INFO L226 Difference]: Without dead ends: 1063 [2021-03-10 22:43:46,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:43:46,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-03-10 22:43:46,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-03-10 22:43:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-03-10 22:43:46,399 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-03-10 22:43:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:46,400 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-03-10 22:43:46,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 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) [2021-03-10 22:43:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-03-10 22:43:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:43:46,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:46,402 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:46,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 22:43:46,625 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:46,626 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-03-10 22:43:46,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:46,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254333875] [2021-03-10 22:43:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254333875] [2021-03-10 22:43:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026976299] [2021-03-10 22:43:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:43:46,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:46,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:46,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:43:46,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151825277] [2021-03-10 22:43:46,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:43:46,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:46,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:43:46,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:46,879 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:46,954 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-03-10 22:43:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:43:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:43:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:46,965 INFO L225 Difference]: With dead ends: 3683 [2021-03-10 22:43:46,965 INFO L226 Difference]: Without dead ends: 3245 [2021-03-10 22:43:46,966 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:43:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-03-10 22:43:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-03-10 22:43:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-03-10 22:43:47,036 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-03-10 22:43:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:47,037 INFO L480 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-03-10 22:43:47,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-03-10 22:43:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:43:47,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:47,042 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:47,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:47,255 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:47,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:47,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-03-10 22:43:47,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:47,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256789188] [2021-03-10 22:43:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256789188] [2021-03-10 22:43:47,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465769007] [2021-03-10 22:43:47,310 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 [2021-03-10 22:43:47,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:43:47,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 22:43:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:47,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:47,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-10 22:43:47,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721102070] [2021-03-10 22:43:47,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:43:47,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:47,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:43:47,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:43:47,466 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:47,580 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-03-10 22:43:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:43:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:43:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:47,598 INFO L225 Difference]: With dead ends: 5705 [2021-03-10 22:43:47,598 INFO L226 Difference]: Without dead ends: 5282 [2021-03-10 22:43:47,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:43:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-03-10 22:43:47,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-03-10 22:43:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-03-10 22:43:47,708 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-03-10 22:43:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:47,709 INFO L480 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-03-10 22:43:47,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:47,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-03-10 22:43:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-03-10 22:43:47,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:47,716 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:47,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-10 22:43:47,927 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:47,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-03-10 22:43:47,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:47,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778245017] [2021-03-10 22:43:47,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778245017] [2021-03-10 22:43:47,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629212717] [2021-03-10 22:43:47,984 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:43:48,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:43:48,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:48,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:48,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:48,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:48,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 22:43:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795212406] [2021-03-10 22:43:48,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:43:48,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:43:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:43:48,110 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:48,193 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-03-10 22:43:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:43:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-03-10 22:43:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:48,211 INFO L225 Difference]: With dead ends: 5724 [2021-03-10 22:43:48,211 INFO L226 Difference]: Without dead ends: 5132 [2021-03-10 22:43:48,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:43:48,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-03-10 22:43:48,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-03-10 22:43:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-03-10 22:43:48,294 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-03-10 22:43:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:48,294 INFO L480 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-03-10 22:43:48,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-03-10 22:43:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:48,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:48,301 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:48,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:48,519 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-03-10 22:43:48,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:48,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960562336] [2021-03-10 22:43:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:48,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960562336] [2021-03-10 22:43:48,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944127597] [2021-03-10 22:43:48,580 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 [2021-03-10 22:43:48,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:43:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:48,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:43:48,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:48,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:48,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 22:43:48,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617736393] [2021-03-10 22:43:48,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:43:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:43:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:43:48,755 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:49,115 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-03-10 22:43:49,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:43:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:49,134 INFO L225 Difference]: With dead ends: 6143 [2021-03-10 22:43:49,134 INFO L226 Difference]: Without dead ends: 6077 [2021-03-10 22:43:49,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:43:49,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-03-10 22:43:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-03-10 22:43:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-03-10 22:43:49,231 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-03-10 22:43:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:49,232 INFO L480 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-03-10 22:43:49,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-03-10 22:43:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:49,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:49,242 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:49,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 22:43:49,462 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:49,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-03-10 22:43:49,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:49,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749906580] [2021-03-10 22:43:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:49,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749906580] [2021-03-10 22:43:49,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984521034] [2021-03-10 22:43:49,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:43:49,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:43:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:43:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:49,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:49,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 22:43:49,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384585888] [2021-03-10 22:43:49,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:43:49,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:49,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:43:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:43:49,663 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:49,898 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-03-10 22:43:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:43:49,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:49,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:49,935 INFO L225 Difference]: With dead ends: 10702 [2021-03-10 22:43:49,936 INFO L226 Difference]: Without dead ends: 10294 [2021-03-10 22:43:49,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:43:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-03-10 22:43:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-03-10 22:43:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-03-10 22:43:50,135 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-03-10 22:43:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:50,135 INFO L480 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-03-10 22:43:50,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-03-10 22:43:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:50,146 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:50,146 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:50,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 22:43:50,359 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:50,360 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-03-10 22:43:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:50,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790428731] [2021-03-10 22:43:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:50,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790428731] [2021-03-10 22:43:50,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12133548] [2021-03-10 22:43:50,401 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 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 [2021-03-10 22:43:50,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:43:50,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:43:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:50,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:50,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 22:43:50,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286179393] [2021-03-10 22:43:50,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:43:50,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:50,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:43:50,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:50,524 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:50,998 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-03-10 22:43:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 22:43:50,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:51,028 INFO L225 Difference]: With dead ends: 7423 [2021-03-10 22:43:51,028 INFO L226 Difference]: Without dead ends: 7391 [2021-03-10 22:43:51,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:43:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-03-10 22:43:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-03-10 22:43:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:51,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-03-10 22:43:51,198 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-03-10 22:43:51,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:51,198 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-03-10 22:43:51,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:51,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-03-10 22:43:51,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:51,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:51,213 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:51,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 22:43:51,414 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:51,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:51,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-03-10 22:43:51,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:51,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265790180] [2021-03-10 22:43:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:51,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265790180] [2021-03-10 22:43:51,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675591895] [2021-03-10 22:43:51,472 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 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 [2021-03-10 22:43:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:51,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:43:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:51,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:51,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 22:43:51,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629171154] [2021-03-10 22:43:51,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:43:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:43:51,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:43:51,613 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:52,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:52,160 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-03-10 22:43:52,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:43:52,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:52,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:52,235 INFO L225 Difference]: With dead ends: 17746 [2021-03-10 22:43:52,235 INFO L226 Difference]: Without dead ends: 17648 [2021-03-10 22:43:52,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:43:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-03-10 22:43:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-03-10 22:43:52,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-03-10 22:43:52,559 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-03-10 22:43:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:52,559 INFO L480 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-03-10 22:43:52,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:52,559 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-03-10 22:43:52,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:52,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:52,578 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:52,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 22:43:52,796 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:52,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-03-10 22:43:52,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:52,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120536691] [2021-03-10 22:43:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:52,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120536691] [2021-03-10 22:43:52,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142011060] [2021-03-10 22:43:52,891 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 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 [2021-03-10 22:43:52,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:43:52,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:43:52,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:53,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:53,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 22:43:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632878143] [2021-03-10 22:43:53,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:43:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:43:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:53,079 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:53,545 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-03-10 22:43:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:43:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:53,707 INFO L225 Difference]: With dead ends: 21973 [2021-03-10 22:43:53,707 INFO L226 Difference]: Without dead ends: 21443 [2021-03-10 22:43:53,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:43:53,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-03-10 22:43:54,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-03-10 22:43:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-03-10 22:43:54,053 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-03-10 22:43:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-03-10 22:43:54,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-03-10 22:43:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:54,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:54,075 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:54,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:54,294 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:54,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-03-10 22:43:54,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:54,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928164102] [2021-03-10 22:43:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:54,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928164102] [2021-03-10 22:43:54,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159532823] [2021-03-10 22:43:54,333 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 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 [2021-03-10 22:43:54,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:43:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:43:54,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:54,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:54,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-03-10 22:43:54,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774609399] [2021-03-10 22:43:54,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:43:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:43:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:43:54,531 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:55,138 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-03-10 22:43:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 22:43:55,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:55,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:55,176 INFO L225 Difference]: With dead ends: 15939 [2021-03-10 22:43:55,176 INFO L226 Difference]: Without dead ends: 15563 [2021-03-10 22:43:55,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:43:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-03-10 22:43:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-03-10 22:43:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-03-10 22:43:55,491 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-03-10 22:43:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:55,491 INFO L480 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-03-10 22:43:55,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-03-10 22:43:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 22:43:55,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:55,519 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:55,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:55,736 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:55,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-03-10 22:43:55,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:55,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105047260] [2021-03-10 22:43:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:55,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105047260] [2021-03-10 22:43:55,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315455206] [2021-03-10 22:43:55,777 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 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 [2021-03-10 22:43:55,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:43:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:43:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:43:55,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:55,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-03-10 22:43:55,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326549371] [2021-03-10 22:43:55,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:43:55,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:55,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:43:55,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:43:55,893 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:56,192 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-03-10 22:43:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:43:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-03-10 22:43:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:56,249 INFO L225 Difference]: With dead ends: 17650 [2021-03-10 22:43:56,249 INFO L226 Difference]: Without dead ends: 17578 [2021-03-10 22:43:56,249 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:43:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-03-10 22:43:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-03-10 22:43:56,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-03-10 22:43:56,711 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-03-10 22:43:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:56,711 INFO L480 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-03-10 22:43:56,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-03-10 22:43:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:43:56,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:56,740 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:56,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 22:43:56,943 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:56,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-03-10 22:43:56,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:56,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546904582] [2021-03-10 22:43:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:43:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546904582] [2021-03-10 22:43:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061866420] [2021-03-10 22:43:56,986 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 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 [2021-03-10 22:43:57,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:43:57,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:57,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 22:43:57,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:57,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:57,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:43:57,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486574105] [2021-03-10 22:43:57,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:43:57,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:43:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:43:57,184 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:43:57,931 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-03-10 22:43:57,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:43:57,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:43:57,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:43:58,090 INFO L225 Difference]: With dead ends: 47667 [2021-03-10 22:43:58,090 INFO L226 Difference]: Without dead ends: 46072 [2021-03-10 22:43:58,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:43:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-03-10 22:43:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-03-10 22:43:59,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-03-10 22:43:59,304 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-03-10 22:43:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:43:59,304 INFO L480 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-03-10 22:43:59,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:43:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-03-10 22:43:59,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:43:59,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:43:59,391 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:43:59,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:43:59,591 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:43:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:43:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-03-10 22:43:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:43:59,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275674990] [2021-03-10 22:43:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:43:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:43:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:43:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275674990] [2021-03-10 22:43:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778230741] [2021-03-10 22:43:59,639 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 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 [2021-03-10 22:43:59,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:43:59,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:43:59,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:43:59,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:43:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:43:59,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:43:59,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 22:43:59,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688411263] [2021-03-10 22:43:59,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:43:59,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:43:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:43:59,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:43:59,772 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:00,457 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-03-10 22:44:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:44:00,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:44:00,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:00,788 INFO L225 Difference]: With dead ends: 41877 [2021-03-10 22:44:00,788 INFO L226 Difference]: Without dead ends: 41385 [2021-03-10 22:44:00,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:44:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-03-10 22:44:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-03-10 22:44:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:01,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-03-10 22:44:01,687 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-03-10 22:44:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:01,688 INFO L480 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-03-10 22:44:01,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-03-10 22:44:01,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:44:01,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:01,769 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:01,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 22:44:01,983 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:01,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-03-10 22:44:01,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:01,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143035775] [2021-03-10 22:44:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:44:02,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143035775] [2021-03-10 22:44:02,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463166274] [2021-03-10 22:44:02,025 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 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 [2021-03-10 22:44:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:44:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:44:02,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:02,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 22:44:02,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608163624] [2021-03-10 22:44:02,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:44:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:44:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:44:02,164 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:03,111 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-03-10 22:44:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:44:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:44:03,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:03,359 INFO L225 Difference]: With dead ends: 55329 [2021-03-10 22:44:03,359 INFO L226 Difference]: Without dead ends: 54965 [2021-03-10 22:44:03,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:44:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-03-10 22:44:04,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-03-10 22:44:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-03-10 22:44:04,750 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-03-10 22:44:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:04,750 INFO L480 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-03-10 22:44:04,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:04,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-03-10 22:44:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-10 22:44:04,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:04,844 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:05,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:05,045 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:05,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-03-10 22:44:05,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:05,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000403357] [2021-03-10 22:44:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:44:05,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000403357] [2021-03-10 22:44:05,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:44:05,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:44:05,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126060742] [2021-03-10 22:44:05,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:44:05,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:44:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:44:05,059 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:05,596 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-03-10 22:44:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:44:05,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-10 22:44:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:05,754 INFO L225 Difference]: With dead ends: 36224 [2021-03-10 22:44:05,754 INFO L226 Difference]: Without dead ends: 36156 [2021-03-10 22:44:05,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:44:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-03-10 22:44:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-03-10 22:44:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-03-10 22:44:06,853 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-03-10 22:44:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:06,853 INFO L480 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-03-10 22:44:06,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-03-10 22:44:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:44:06,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:06,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:06,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-03-10 22:44:06,960 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-03-10 22:44:06,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:06,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145708012] [2021-03-10 22:44:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:44:06,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145708012] [2021-03-10 22:44:06,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314633999] [2021-03-10 22:44:06,980 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:44:07,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:44:07,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:44:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:44:07,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:07,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-03-10 22:44:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208161286] [2021-03-10 22:44:07,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:44:07,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:44:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:44:07,124 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:08,007 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-03-10 22:44:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:44:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:44:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:08,233 INFO L225 Difference]: With dead ends: 51586 [2021-03-10 22:44:08,233 INFO L226 Difference]: Without dead ends: 50003 [2021-03-10 22:44:08,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:44:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-03-10 22:44:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-03-10 22:44:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-03-10 22:44:09,643 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-03-10 22:44:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:09,643 INFO L480 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-03-10 22:44:09,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-03-10 22:44:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 22:44:10,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:10,099 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:10,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 22:44:10,325 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-03-10 22:44:10,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:10,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338747666] [2021-03-10 22:44:10,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:44:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338747666] [2021-03-10 22:44:10,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080454406] [2021-03-10 22:44:10,368 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 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 [2021-03-10 22:44:10,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:44:10,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:44:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:10,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:44:10,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:10,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 22:44:10,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075796863] [2021-03-10 22:44:10,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:44:10,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:10,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:44:10,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:44:10,497 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:11,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:11,200 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-03-10 22:44:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:44:11,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 22:44:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:11,860 INFO L225 Difference]: With dead ends: 63166 [2021-03-10 22:44:11,860 INFO L226 Difference]: Without dead ends: 63106 [2021-03-10 22:44:11,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:44:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-03-10 22:44:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-03-10 22:44:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:13,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-03-10 22:44:13,483 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-03-10 22:44:13,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:13,483 INFO L480 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-03-10 22:44:13,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:13,483 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-03-10 22:44:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:13,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:13,583 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:13,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 22:44:13,784 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-03-10 22:44:13,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:13,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779904409] [2021-03-10 22:44:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:44:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779904409] [2021-03-10 22:44:13,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994546353] [2021-03-10 22:44:13,845 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 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 [2021-03-10 22:44:13,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:44:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:44:13,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:44:14,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:14,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:44:14,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817949976] [2021-03-10 22:44:14,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:44:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:44:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:44:14,008 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:14,399 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-03-10 22:44:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:44:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:14,922 INFO L225 Difference]: With dead ends: 49744 [2021-03-10 22:44:14,922 INFO L226 Difference]: Without dead ends: 49407 [2021-03-10 22:44:14,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:44:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-03-10 22:44:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-03-10 22:44:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-03-10 22:44:16,226 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-03-10 22:44:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:16,226 INFO L480 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-03-10 22:44:16,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-03-10 22:44:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:16,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:16,350 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:16,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 22:44:16,555 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-03-10 22:44:16,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:16,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412060729] [2021-03-10 22:44:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412060729] [2021-03-10 22:44:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405399931] [2021-03-10 22:44:16,608 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 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 [2021-03-10 22:44:16,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:44:16,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:16,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:44:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:16,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:16,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:44:16,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999859068] [2021-03-10 22:44:16,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:44:16,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:16,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:44:16,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:44:16,814 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:17,652 INFO L93 Difference]: Finished difference Result 58655 states and 269908 transitions. [2021-03-10 22:44:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:44:17,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:17,917 INFO L225 Difference]: With dead ends: 58655 [2021-03-10 22:44:17,918 INFO L226 Difference]: Without dead ends: 57127 [2021-03-10 22:44:17,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:44:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57127 states. [2021-03-10 22:44:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57127 to 53264. [2021-03-10 22:44:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53264 states, 53263 states have (on average 4.692769840226799) internal successors, (249951), 53263 states have internal predecessors, (249951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53264 states to 53264 states and 249951 transitions. [2021-03-10 22:44:19,650 INFO L78 Accepts]: Start accepts. Automaton has 53264 states and 249951 transitions. Word has length 41 [2021-03-10 22:44:19,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:19,650 INFO L480 AbstractCegarLoop]: Abstraction has 53264 states and 249951 transitions. [2021-03-10 22:44:19,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:19,650 INFO L276 IsEmpty]: Start isEmpty. Operand 53264 states and 249951 transitions. [2021-03-10 22:44:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:19,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:19,805 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:20,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 22:44:20,006 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-03-10 22:44:20,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:20,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077656667] [2021-03-10 22:44:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:20,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077656667] [2021-03-10 22:44:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137710514] [2021-03-10 22:44:20,073 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 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 [2021-03-10 22:44:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:44:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:44:20,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:20,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 22:44:20,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965521796] [2021-03-10 22:44:20,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:44:20,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:20,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:44:20,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:44:20,249 INFO L87 Difference]: Start difference. First operand 53264 states and 249951 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:21,196 INFO L93 Difference]: Finished difference Result 64994 states and 300027 transitions. [2021-03-10 22:44:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:44:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:21,486 INFO L225 Difference]: With dead ends: 64994 [2021-03-10 22:44:21,486 INFO L226 Difference]: Without dead ends: 64471 [2021-03-10 22:44:21,486 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:44:21,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64471 states. [2021-03-10 22:44:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64471 to 59199. [2021-03-10 22:44:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59199 states, 59198 states have (on average 4.691932159870266) internal successors, (277753), 59198 states have internal predecessors, (277753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59199 states to 59199 states and 277753 transitions. [2021-03-10 22:44:23,344 INFO L78 Accepts]: Start accepts. Automaton has 59199 states and 277753 transitions. Word has length 41 [2021-03-10 22:44:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:23,344 INFO L480 AbstractCegarLoop]: Abstraction has 59199 states and 277753 transitions. [2021-03-10 22:44:23,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 59199 states and 277753 transitions. [2021-03-10 22:44:23,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:23,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:23,915 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:24,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:24,132 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:24,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-03-10 22:44:24,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:24,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344239091] [2021-03-10 22:44:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:24,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344239091] [2021-03-10 22:44:24,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672917415] [2021-03-10 22:44:24,203 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 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 [2021-03-10 22:44:24,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:44:24,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:44:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:44:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847644408] [2021-03-10 22:44:24,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:44:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:44:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:44:24,407 INFO L87 Difference]: Start difference. First operand 59199 states and 277753 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:25,292 INFO L93 Difference]: Finished difference Result 98609 states and 451214 transitions. [2021-03-10 22:44:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:44:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:25,730 INFO L225 Difference]: With dead ends: 98609 [2021-03-10 22:44:25,730 INFO L226 Difference]: Without dead ends: 96198 [2021-03-10 22:44:25,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:44:26,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96198 states. [2021-03-10 22:44:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96198 to 77552. [2021-03-10 22:44:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77552 states, 77551 states have (on average 4.7024409743265725) internal successors, (364679), 77551 states have internal predecessors, (364679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77552 states to 77552 states and 364679 transitions. [2021-03-10 22:44:29,050 INFO L78 Accepts]: Start accepts. Automaton has 77552 states and 364679 transitions. Word has length 41 [2021-03-10 22:44:29,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:29,051 INFO L480 AbstractCegarLoop]: Abstraction has 77552 states and 364679 transitions. [2021-03-10 22:44:29,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:29,051 INFO L276 IsEmpty]: Start isEmpty. Operand 77552 states and 364679 transitions. [2021-03-10 22:44:29,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:29,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:29,361 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:29,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:29,563 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:29,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-03-10 22:44:29,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:29,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043828020] [2021-03-10 22:44:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:29,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043828020] [2021-03-10 22:44:29,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612593933] [2021-03-10 22:44:29,620 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:44:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:44:29,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:29,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:44:29,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:29,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:29,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-03-10 22:44:29,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677590106] [2021-03-10 22:44:29,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:44:29,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:29,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:44:29,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:44:29,752 INFO L87 Difference]: Start difference. First operand 77552 states and 364679 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:31,776 INFO L93 Difference]: Finished difference Result 163302 states and 753749 transitions. [2021-03-10 22:44:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:44:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:31,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:32,567 INFO L225 Difference]: With dead ends: 163302 [2021-03-10 22:44:32,567 INFO L226 Difference]: Without dead ends: 159716 [2021-03-10 22:44:32,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:44:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-03-10 22:44:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 127858. [2021-03-10 22:44:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127858 states, 127857 states have (on average 4.7511907834533895) internal successors, (607473), 127857 states have internal predecessors, (607473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:38,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127858 states to 127858 states and 607473 transitions. [2021-03-10 22:44:38,507 INFO L78 Accepts]: Start accepts. Automaton has 127858 states and 607473 transitions. Word has length 41 [2021-03-10 22:44:38,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:38,507 INFO L480 AbstractCegarLoop]: Abstraction has 127858 states and 607473 transitions. [2021-03-10 22:44:38,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 127858 states and 607473 transitions. [2021-03-10 22:44:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:38,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:38,896 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:39,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 22:44:39,096 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:39,097 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-03-10 22:44:39,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:39,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465674573] [2021-03-10 22:44:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465674573] [2021-03-10 22:44:39,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417322981] [2021-03-10 22:44:39,159 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 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 [2021-03-10 22:44:39,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:44:39,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:39,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:44:39,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:39,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:39,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:44:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660421957] [2021-03-10 22:44:39,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:44:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:39,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:44:39,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:44:39,328 INFO L87 Difference]: Start difference. First operand 127858 states and 607473 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:41,321 INFO L93 Difference]: Finished difference Result 160659 states and 745725 transitions. [2021-03-10 22:44:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:44:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:42,138 INFO L225 Difference]: With dead ends: 160659 [2021-03-10 22:44:42,138 INFO L226 Difference]: Without dead ends: 160367 [2021-03-10 22:44:42,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:44:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160367 states. [2021-03-10 22:44:46,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160367 to 127640. [2021-03-10 22:44:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127640 states, 127639 states have (on average 4.7386222079458475) internal successors, (604833), 127639 states have internal predecessors, (604833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127640 states to 127640 states and 604833 transitions. [2021-03-10 22:44:47,884 INFO L78 Accepts]: Start accepts. Automaton has 127640 states and 604833 transitions. Word has length 41 [2021-03-10 22:44:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:47,884 INFO L480 AbstractCegarLoop]: Abstraction has 127640 states and 604833 transitions. [2021-03-10 22:44:47,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 127640 states and 604833 transitions. [2021-03-10 22:44:48,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:48,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:48,299 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:48,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:44:48,503 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:48,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:48,504 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-03-10 22:44:48,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:48,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761501768] [2021-03-10 22:44:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761501768] [2021-03-10 22:44:48,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438309292] [2021-03-10 22:44:48,568 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 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 [2021-03-10 22:44:48,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:44:48,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:48,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:44:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:48,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:48,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:44:48,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894969079] [2021-03-10 22:44:48,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:44:48,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:48,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:44:48,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:44:48,734 INFO L87 Difference]: Start difference. First operand 127640 states and 604833 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:50,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:50,986 INFO L93 Difference]: Finished difference Result 186207 states and 872340 transitions. [2021-03-10 22:44:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:44:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:44:52,490 INFO L225 Difference]: With dead ends: 186207 [2021-03-10 22:44:52,491 INFO L226 Difference]: Without dead ends: 182994 [2021-03-10 22:44:52,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:44:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182994 states. [2021-03-10 22:44:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182994 to 96217. [2021-03-10 22:44:56,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-03-10 22:44:56,765 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-03-10 22:44:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:44:56,765 INFO L480 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-03-10 22:44:56,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-03-10 22:44:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:44:57,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:44:57,683 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:44:57,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 22:44:57,884 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:44:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:44:57,884 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-03-10 22:44:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:44:57,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871832982] [2021-03-10 22:44:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:44:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:44:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:57,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871832982] [2021-03-10 22:44:57,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216173786] [2021-03-10 22:44:57,938 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 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 [2021-03-10 22:44:57,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:44:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:44:57,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:44:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:44:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:44:58,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:44:58,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-03-10 22:44:58,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277551168] [2021-03-10 22:44:58,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:44:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:44:58,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:44:58,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:44:58,110 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:44:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:44:59,032 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-03-10 22:44:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:44:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:44:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:00,110 INFO L225 Difference]: With dead ends: 118313 [2021-03-10 22:45:00,110 INFO L226 Difference]: Without dead ends: 118079 [2021-03-10 22:45:00,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:45:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-03-10 22:45:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-03-10 22:45:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-03-10 22:45:04,216 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-03-10 22:45:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:04,216 INFO L480 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-03-10 22:45:04,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-03-10 22:45:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:45:04,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:04,656 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:04,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 22:45:04,874 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:04,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:04,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-03-10 22:45:04,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:04,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076605750] [2021-03-10 22:45:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076605750] [2021-03-10 22:45:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706556219] [2021-03-10 22:45:04,945 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 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 [2021-03-10 22:45:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:04,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:04,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:05,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:05,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-03-10 22:45:05,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526430824] [2021-03-10 22:45:05,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:45:05,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:45:05,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:45:05,160 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:06,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:06,617 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-03-10 22:45:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:45:06,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:45:06,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:07,505 INFO L225 Difference]: With dead ends: 131320 [2021-03-10 22:45:07,505 INFO L226 Difference]: Without dead ends: 130644 [2021-03-10 22:45:07,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:45:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-03-10 22:45:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-03-10 22:45:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-03-10 22:45:11,151 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-03-10 22:45:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:11,151 INFO L480 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-03-10 22:45:11,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-03-10 22:45:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:45:11,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:11,450 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:11,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 22:45:11,650 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:11,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-03-10 22:45:11,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:11,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119445067] [2021-03-10 22:45:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119445067] [2021-03-10 22:45:12,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558007207] [2021-03-10 22:45:12,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:12,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:45:12,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:12,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:12,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:12,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:12,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:45:12,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256483936] [2021-03-10 22:45:12,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:45:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:12,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:45:12,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:45:12,540 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:13,585 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-03-10 22:45:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:45:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:45:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:14,660 INFO L225 Difference]: With dead ends: 140482 [2021-03-10 22:45:14,660 INFO L226 Difference]: Without dead ends: 139756 [2021-03-10 22:45:14,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:45:14,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-03-10 22:45:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-03-10 22:45:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-03-10 22:45:18,473 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-03-10 22:45:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:18,473 INFO L480 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-03-10 22:45:18,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-03-10 22:45:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:45:18,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:18,816 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:19,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 22:45:19,016 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-03-10 22:45:19,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:19,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051874575] [2021-03-10 22:45:19,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:19,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051874575] [2021-03-10 22:45:19,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688699575] [2021-03-10 22:45:19,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:19,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:45:19,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:19,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:19,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:20,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:20,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:45:20,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196939206] [2021-03-10 22:45:20,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:45:20,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:45:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:45:20,068 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:21,847 INFO L93 Difference]: Finished difference Result 184975 states and 856180 transitions. [2021-03-10 22:45:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:45:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:45:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:22,614 INFO L225 Difference]: With dead ends: 184975 [2021-03-10 22:45:22,615 INFO L226 Difference]: Without dead ends: 182892 [2021-03-10 22:45:22,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:45:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182892 states. [2021-03-10 22:45:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182892 to 160009. [2021-03-10 22:45:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160009 states, 160008 states have (on average 4.737906854657267) internal successors, (758103), 160008 states have internal predecessors, (758103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:28,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160009 states to 160009 states and 758103 transitions. [2021-03-10 22:45:28,967 INFO L78 Accepts]: Start accepts. Automaton has 160009 states and 758103 transitions. Word has length 41 [2021-03-10 22:45:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:28,967 INFO L480 AbstractCegarLoop]: Abstraction has 160009 states and 758103 transitions. [2021-03-10 22:45:28,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 160009 states and 758103 transitions. [2021-03-10 22:45:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:45:29,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:29,402 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:29,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 22:45:29,603 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-03-10 22:45:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245727848] [2021-03-10 22:45:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:29,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245727848] [2021-03-10 22:45:29,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404900687] [2021-03-10 22:45:29,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:29,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:45:29,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:45:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:45:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:29,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:29,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 22:45:29,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686505938] [2021-03-10 22:45:29,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:45:29,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:29,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:45:29,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:45:29,869 INFO L87 Difference]: Start difference. First operand 160009 states and 758103 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:32,992 INFO L93 Difference]: Finished difference Result 275154 states and 1285905 transitions. [2021-03-10 22:45:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:45:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:45:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:34,268 INFO L225 Difference]: With dead ends: 275154 [2021-03-10 22:45:34,268 INFO L226 Difference]: Without dead ends: 272682 [2021-03-10 22:45:34,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:45:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272682 states. [2021-03-10 22:45:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272682 to 197517. [2021-03-10 22:45:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197517 states, 197516 states have (on average 4.791348548978311) internal successors, (946368), 197516 states have internal predecessors, (946368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197517 states to 197517 states and 946368 transitions. [2021-03-10 22:45:43,352 INFO L78 Accepts]: Start accepts. Automaton has 197517 states and 946368 transitions. Word has length 41 [2021-03-10 22:45:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:43,352 INFO L480 AbstractCegarLoop]: Abstraction has 197517 states and 946368 transitions. [2021-03-10 22:45:43,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 197517 states and 946368 transitions. [2021-03-10 22:45:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:45:44,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:45:44,526 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:45:44,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:44,742 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:45:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:45:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-03-10 22:45:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:45:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198636830] [2021-03-10 22:45:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:45:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:45:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:44,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198636830] [2021-03-10 22:45:44,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952462270] [2021-03-10 22:45:44,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:45:44,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:45:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:45:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:45:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:45:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:45:44,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:45:44,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 22:45:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132856592] [2021-03-10 22:45:44,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:45:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:45:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:45:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:45:44,970 INFO L87 Difference]: Start difference. First operand 197517 states and 946368 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:45:47,597 INFO L93 Difference]: Finished difference Result 288467 states and 1353676 transitions. [2021-03-10 22:45:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:45:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:45:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:45:49,430 INFO L225 Difference]: With dead ends: 288467 [2021-03-10 22:45:49,430 INFO L226 Difference]: Without dead ends: 287967 [2021-03-10 22:45:49,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:45:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287967 states. [2021-03-10 22:45:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287967 to 203660. [2021-03-10 22:45:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203660 states, 203659 states have (on average 4.804614576326114) internal successors, (978503), 203659 states have internal predecessors, (978503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203660 states to 203660 states and 978503 transitions. [2021-03-10 22:45:59,277 INFO L78 Accepts]: Start accepts. Automaton has 203660 states and 978503 transitions. Word has length 41 [2021-03-10 22:45:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:45:59,277 INFO L480 AbstractCegarLoop]: Abstraction has 203660 states and 978503 transitions. [2021-03-10 22:45:59,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:45:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 203660 states and 978503 transitions. [2021-03-10 22:46:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:46:00,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:00,046 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:00,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 22:46:00,259 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:00,260 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-03-10 22:46:00,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:00,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646086582] [2021-03-10 22:46:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646086582] [2021-03-10 22:46:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125789222] [2021-03-10 22:46:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:46:00,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:46:00,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:46:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:46:00,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:00,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 22:46:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945280864] [2021-03-10 22:46:00,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:46:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:00,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:46:00,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:46:00,623 INFO L87 Difference]: Start difference. First operand 203660 states and 978503 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:04,204 INFO L93 Difference]: Finished difference Result 267133 states and 1271421 transitions. [2021-03-10 22:46:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:46:04,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:46:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:05,839 INFO L225 Difference]: With dead ends: 267133 [2021-03-10 22:46:05,839 INFO L226 Difference]: Without dead ends: 264039 [2021-03-10 22:46:05,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:46:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264039 states. [2021-03-10 22:46:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264039 to 116427. [2021-03-10 22:46:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-03-10 22:46:12,354 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-03-10 22:46:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:12,354 INFO L480 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-03-10 22:46:12,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-03-10 22:46:12,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:46:12,689 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:12,689 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:12,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 22:46:12,890 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-03-10 22:46:12,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:12,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561348641] [2021-03-10 22:46:12,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:12,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561348641] [2021-03-10 22:46:12,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373487959] [2021-03-10 22:46:12,945 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 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 [2021-03-10 22:46:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:46:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:13,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:13,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 22:46:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764399935] [2021-03-10 22:46:13,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:46:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:46:13,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:46:13,126 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:15,104 INFO L93 Difference]: Finished difference Result 201247 states and 938010 transitions. [2021-03-10 22:46:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:46:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:46:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:16,458 INFO L225 Difference]: With dead ends: 201247 [2021-03-10 22:46:16,458 INFO L226 Difference]: Without dead ends: 199504 [2021-03-10 22:46:16,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:46:16,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199504 states. [2021-03-10 22:46:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199504 to 144560. [2021-03-10 22:46:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144560 states, 144559 states have (on average 4.791019583699389) internal successors, (692585), 144559 states have internal predecessors, (692585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:22,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144560 states to 144560 states and 692585 transitions. [2021-03-10 22:46:22,387 INFO L78 Accepts]: Start accepts. Automaton has 144560 states and 692585 transitions. Word has length 41 [2021-03-10 22:46:22,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:22,387 INFO L480 AbstractCegarLoop]: Abstraction has 144560 states and 692585 transitions. [2021-03-10 22:46:22,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 144560 states and 692585 transitions. [2021-03-10 22:46:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:46:22,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:22,783 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:22,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:22,984 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:22,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:22,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-03-10 22:46:22,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:22,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692501100] [2021-03-10 22:46:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692501100] [2021-03-10 22:46:23,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838967791] [2021-03-10 22:46:23,050 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 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 [2021-03-10 22:46:23,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:46:23,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:23,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:46:23,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:46:23,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:23,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:23,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-10 22:46:23,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724827261] [2021-03-10 22:46:23,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:46:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:46:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:46:23,225 INFO L87 Difference]: Start difference. First operand 144560 states and 692585 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:26,511 INFO L93 Difference]: Finished difference Result 274872 states and 1287895 transitions. [2021-03-10 22:46:26,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:46:26,511 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:46:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:27,814 INFO L225 Difference]: With dead ends: 274872 [2021-03-10 22:46:27,814 INFO L226 Difference]: Without dead ends: 271772 [2021-03-10 22:46:27,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:46:28,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271772 states. [2021-03-10 22:46:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271772 to 172077. [2021-03-10 22:46:35,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172077 states, 172076 states have (on average 4.845667030846835) internal successors, (833823), 172076 states have internal predecessors, (833823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172077 states to 172077 states and 833823 transitions. [2021-03-10 22:46:36,656 INFO L78 Accepts]: Start accepts. Automaton has 172077 states and 833823 transitions. Word has length 41 [2021-03-10 22:46:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:46:36,657 INFO L480 AbstractCegarLoop]: Abstraction has 172077 states and 833823 transitions. [2021-03-10 22:46:36,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 172077 states and 833823 transitions. [2021-03-10 22:46:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:46:37,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:46:37,904 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:46:38,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 22:46:38,104 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:46:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:46:38,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-03-10 22:46:38,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:46:38,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975188322] [2021-03-10 22:46:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:46:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:46:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:38,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975188322] [2021-03-10 22:46:38,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715939154] [2021-03-10 22:46:38,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:46:38,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:46:38,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:46:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:46:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:46:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:46:38,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:46:38,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-03-10 22:46:38,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21659267] [2021-03-10 22:46:38,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:46:38,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:46:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:46:38,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:46:38,332 INFO L87 Difference]: Start difference. First operand 172077 states and 833823 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:46:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:46:43,256 INFO L93 Difference]: Finished difference Result 421279 states and 2020655 transitions. [2021-03-10 22:46:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:46:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:46:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:46:46,939 INFO L225 Difference]: With dead ends: 421279 [2021-03-10 22:46:46,939 INFO L226 Difference]: Without dead ends: 417312 [2021-03-10 22:46:46,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:46:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417312 states. [2021-03-10 22:47:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417312 to 264381. [2021-03-10 22:47:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264381 states, 264380 states have (on average 4.960484908086845) internal successors, (1311453), 264380 states have internal predecessors, (1311453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264381 states to 264381 states and 1311453 transitions. [2021-03-10 22:47:02,889 INFO L78 Accepts]: Start accepts. Automaton has 264381 states and 1311453 transitions. Word has length 41 [2021-03-10 22:47:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:02,889 INFO L480 AbstractCegarLoop]: Abstraction has 264381 states and 1311453 transitions. [2021-03-10 22:47:02,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 264381 states and 1311453 transitions. [2021-03-10 22:47:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:47:03,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:03,716 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:03,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:47:03,916 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-03-10 22:47:03,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:03,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965749711] [2021-03-10 22:47:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:03,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965749711] [2021-03-10 22:47:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005630469] [2021-03-10 22:47:03,980 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 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 [2021-03-10 22:47:04,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:47:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 22:47:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:04,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:04,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 22:47:04,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356020496] [2021-03-10 22:47:04,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:47:04,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:47:04,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:47:04,168 INFO L87 Difference]: Start difference. First operand 264381 states and 1311453 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:07,885 INFO L93 Difference]: Finished difference Result 352198 states and 1704934 transitions. [2021-03-10 22:47:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:47:07,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:47:07,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:10,318 INFO L225 Difference]: With dead ends: 352198 [2021-03-10 22:47:10,318 INFO L226 Difference]: Without dead ends: 351878 [2021-03-10 22:47:10,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:47:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351878 states. [2021-03-10 22:47:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351878 to 238270. [2021-03-10 22:47:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238270 states, 238269 states have (on average 4.929269019469591) internal successors, (1174492), 238269 states have internal predecessors, (1174492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238270 states to 238270 states and 1174492 transitions. [2021-03-10 22:47:22,876 INFO L78 Accepts]: Start accepts. Automaton has 238270 states and 1174492 transitions. Word has length 41 [2021-03-10 22:47:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:22,877 INFO L480 AbstractCegarLoop]: Abstraction has 238270 states and 1174492 transitions. [2021-03-10 22:47:22,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 238270 states and 1174492 transitions. [2021-03-10 22:47:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-03-10 22:47:23,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:23,580 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:23,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 22:47:23,783 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:23,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:23,783 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-03-10 22:47:23,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:23,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554021462] [2021-03-10 22:47:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:23,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554021462] [2021-03-10 22:47:23,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550394261] [2021-03-10 22:47:23,854 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 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 [2021-03-10 22:47:23,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:47:23,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:23,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 22:47:23,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:47:24,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:24,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-03-10 22:47:24,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859905307] [2021-03-10 22:47:24,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:47:24,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:47:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:47:24,057 INFO L87 Difference]: Start difference. First operand 238270 states and 1174492 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:27,550 INFO L93 Difference]: Finished difference Result 313342 states and 1530219 transitions. [2021-03-10 22:47:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:47:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-03-10 22:47:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:29,080 INFO L225 Difference]: With dead ends: 313342 [2021-03-10 22:47:29,081 INFO L226 Difference]: Without dead ends: 310500 [2021-03-10 22:47:29,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:47:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310500 states. [2021-03-10 22:47:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310500 to 134690. [2021-03-10 22:47:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134690 states, 134689 states have (on average 4.812145015554351) internal successors, (648143), 134689 states have internal predecessors, (648143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134690 states to 134690 states and 648143 transitions. [2021-03-10 22:47:37,314 INFO L78 Accepts]: Start accepts. Automaton has 134690 states and 648143 transitions. Word has length 41 [2021-03-10 22:47:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:37,315 INFO L480 AbstractCegarLoop]: Abstraction has 134690 states and 648143 transitions. [2021-03-10 22:47:37,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 134690 states and 648143 transitions. [2021-03-10 22:47:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:47:37,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:37,762 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:37,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 22:47:37,964 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:37,964 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-03-10 22:47:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:37,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463633404] [2021-03-10 22:47:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:47:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463633404] [2021-03-10 22:47:38,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005474540] [2021-03-10 22:47:38,025 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 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 [2021-03-10 22:47:38,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:47:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:47:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:47:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:47:38,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:38,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-03-10 22:47:38,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475964395] [2021-03-10 22:47:38,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:47:38,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:38,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:47:38,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:47:38,175 INFO L87 Difference]: Start difference. First operand 134690 states and 648143 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:42,115 INFO L93 Difference]: Finished difference Result 319506 states and 1518920 transitions. [2021-03-10 22:47:42,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:47:42,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:47:42,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:45,161 INFO L225 Difference]: With dead ends: 319506 [2021-03-10 22:47:45,161 INFO L226 Difference]: Without dead ends: 318460 [2021-03-10 22:47:45,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:47:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318460 states. [2021-03-10 22:47:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318460 to 128351. [2021-03-10 22:47:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128351 states, 128350 states have (on average 4.731468640436307) internal successors, (607284), 128350 states have internal predecessors, (607284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128351 states to 128351 states and 607284 transitions. [2021-03-10 22:47:51,956 INFO L78 Accepts]: Start accepts. Automaton has 128351 states and 607284 transitions. Word has length 43 [2021-03-10 22:47:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:47:51,956 INFO L480 AbstractCegarLoop]: Abstraction has 128351 states and 607284 transitions. [2021-03-10 22:47:51,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 128351 states and 607284 transitions. [2021-03-10 22:47:53,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:47:53,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:47:53,031 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:47:53,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 22:47:53,232 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:47:53,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:47:53,232 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-03-10 22:47:53,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:47:53,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839436022] [2021-03-10 22:47:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:47:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:47:53,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839436022] [2021-03-10 22:47:53,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674790865] [2021-03-10 22:47:53,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:47:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:47:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:47:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:47:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:47:53,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:47:53,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:47:53,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982708052] [2021-03-10 22:47:53,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:47:53,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:47:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:47:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:47:53,408 INFO L87 Difference]: Start difference. First operand 128351 states and 607284 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:47:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:47:56,669 INFO L93 Difference]: Finished difference Result 326630 states and 1488472 transitions. [2021-03-10 22:47:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 22:47:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:47:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:47:57,922 INFO L225 Difference]: With dead ends: 326630 [2021-03-10 22:47:57,922 INFO L226 Difference]: Without dead ends: 323142 [2021-03-10 22:47:57,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 22:47:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323142 states. [2021-03-10 22:48:04,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323142 to 144961. [2021-03-10 22:48:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144961 states, 144960 states have (on average 4.735099337748345) internal successors, (686400), 144960 states have internal predecessors, (686400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:05,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144961 states to 144961 states and 686400 transitions. [2021-03-10 22:48:05,574 INFO L78 Accepts]: Start accepts. Automaton has 144961 states and 686400 transitions. Word has length 43 [2021-03-10 22:48:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:05,574 INFO L480 AbstractCegarLoop]: Abstraction has 144961 states and 686400 transitions. [2021-03-10 22:48:05,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 144961 states and 686400 transitions. [2021-03-10 22:48:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:48:06,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:06,592 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:06,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 22:48:06,792 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-03-10 22:48:06,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:06,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204960083] [2021-03-10 22:48:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:48:06,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204960083] [2021-03-10 22:48:06,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000895493] [2021-03-10 22:48:06,835 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 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 [2021-03-10 22:48:06,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:48:06,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:48:06,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:48:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:48:06,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824939448] [2021-03-10 22:48:06,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:48:06,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:48:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:48:06,991 INFO L87 Difference]: Start difference. First operand 144961 states and 686400 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:09,672 INFO L93 Difference]: Finished difference Result 252971 states and 1191139 transitions. [2021-03-10 22:48:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:48:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:48:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:11,525 INFO L225 Difference]: With dead ends: 252971 [2021-03-10 22:48:11,525 INFO L226 Difference]: Without dead ends: 252073 [2021-03-10 22:48:11,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:48:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252073 states. [2021-03-10 22:48:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252073 to 102134. [2021-03-10 22:48:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-03-10 22:48:16,669 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-03-10 22:48:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:16,669 INFO L480 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-03-10 22:48:16,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-03-10 22:48:17,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:48:17,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:17,586 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:17,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:17,786 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-03-10 22:48:17,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:17,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847098072] [2021-03-10 22:48:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:48:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847098072] [2021-03-10 22:48:17,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988967209] [2021-03-10 22:48:17,846 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:48:17,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:48:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:48:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:48:18,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:18,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 22:48:18,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245087853] [2021-03-10 22:48:18,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:48:18,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:48:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:48:18,008 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:22,679 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-03-10 22:48:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-03-10 22:48:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:48:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:25,040 INFO L225 Difference]: With dead ends: 359669 [2021-03-10 22:48:25,040 INFO L226 Difference]: Without dead ends: 358139 [2021-03-10 22:48:25,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 881.7ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 22:48:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-03-10 22:48:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-03-10 22:48:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-03-10 22:48:33,440 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-03-10 22:48:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:33,440 INFO L480 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-03-10 22:48:33,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-03-10 22:48:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 22:48:33,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:33,885 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:34,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 22:48:34,086 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:34,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-03-10 22:48:34,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:34,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783730954] [2021-03-10 22:48:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 22:48:34,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783730954] [2021-03-10 22:48:34,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892477222] [2021-03-10 22:48:34,124 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 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 [2021-03-10 22:48:34,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:48:34,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:48:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 22:48:34,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:34,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 22:48:34,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957365642] [2021-03-10 22:48:34,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:48:34,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:34,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:48:34,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:48:34,278 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:38,210 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-03-10 22:48:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:48:38,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 22:48:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:48:40,504 INFO L225 Difference]: With dead ends: 318028 [2021-03-10 22:48:40,505 INFO L226 Difference]: Without dead ends: 317616 [2021-03-10 22:48:40,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:48:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-03-10 22:48:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-03-10 22:48:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-03-10 22:48:49,742 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-03-10 22:48:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:48:49,742 INFO L480 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-03-10 22:48:49,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-03-10 22:48:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:48:50,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:48:50,872 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:48:51,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:48:51,083 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:48:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:48:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-03-10 22:48:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:48:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104668816] [2021-03-10 22:48:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:48:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:48:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:48:51,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104668816] [2021-03-10 22:48:51,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879492084] [2021-03-10 22:48:51,141 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 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 [2021-03-10 22:48:51,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:48:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:48:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:48:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:48:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-03-10 22:48:51,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:48:51,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-03-10 22:48:51,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384982062] [2021-03-10 22:48:51,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:48:51,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:48:51,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:48:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:48:51,285 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:48:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:48:59,446 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-03-10 22:48:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 22:48:59,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:48:59,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:49:03,818 INFO L225 Difference]: With dead ends: 593260 [2021-03-10 22:49:03,818 INFO L226 Difference]: Without dead ends: 584415 [2021-03-10 22:49:03,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 22:49:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-03-10 22:49:15,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-03-10 22:49:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-03-10 22:49:17,851 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-03-10 22:49:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:49:17,851 INFO L480 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-03-10 22:49:17,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-03-10 22:49:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:49:18,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:49:18,573 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:49:18,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:49:18,773 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:49:18,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:49:18,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-03-10 22:49:18,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:49:18,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932277628] [2021-03-10 22:49:18,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:49:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:49:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:49:18,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932277628] [2021-03-10 22:49:18,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052267849] [2021-03-10 22:49:18,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:49:18,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:49:18,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:49:18,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:49:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:49:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:49:18,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:49:18,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-03-10 22:49:18,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699937430] [2021-03-10 22:49:18,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:49:18,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:49:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:49:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:49:18,968 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:49:26,261 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-03-10 22:49:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-03-10 22:49:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:49:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:49:29,774 INFO L225 Difference]: With dead ends: 489163 [2021-03-10 22:49:29,774 INFO L226 Difference]: Without dead ends: 486417 [2021-03-10 22:49:29,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1769.4ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-03-10 22:49:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-03-10 22:49:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-03-10 22:49:41,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-03-10 22:49:43,319 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-03-10 22:49:43,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:49:43,319 INFO L480 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-03-10 22:49:43,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-03-10 22:49:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:49:44,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:49:44,139 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:49:44,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 22:49:44,340 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:49:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:49:44,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-03-10 22:49:44,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:49:44,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666343221] [2021-03-10 22:49:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:49:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:49:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:49:44,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666343221] [2021-03-10 22:49:44,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126902853] [2021-03-10 22:49:44,384 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 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 [2021-03-10 22:49:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:49:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:49:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:49:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 22:49:44,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:49:44,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-03-10 22:49:44,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828150578] [2021-03-10 22:49:44,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:49:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:49:44,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:49:44,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:49:44,547 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:49:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:49:49,499 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-03-10 22:49:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:49:49,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:49:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:49:52,392 INFO L225 Difference]: With dead ends: 345677 [2021-03-10 22:49:52,392 INFO L226 Difference]: Without dead ends: 344598 [2021-03-10 22:49:52,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:49:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-03-10 22:50:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-03-10 22:50:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-03-10 22:50:03,039 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-03-10 22:50:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:50:03,039 INFO L480 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-03-10 22:50:03,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-03-10 22:50:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:50:03,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:50:03,817 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:50:04,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:50:04,027 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:50:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:50:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-03-10 22:50:04,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:50:04,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941000171] [2021-03-10 22:50:04,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:50:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:50:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:50:04,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941000171] [2021-03-10 22:50:04,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560166860] [2021-03-10 22:50:04,072 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 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 [2021-03-10 22:50:04,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:50:04,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:50:04,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:50:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:50:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:50:04,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:50:04,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-10 22:50:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306649274] [2021-03-10 22:50:04,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:50:04,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:50:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:50:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:50:04,218 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:50:09,122 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-03-10 22:50:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 22:50:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:50:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:50:11,989 INFO L225 Difference]: With dead ends: 362878 [2021-03-10 22:50:11,989 INFO L226 Difference]: Without dead ends: 361792 [2021-03-10 22:50:11,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:50:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-03-10 22:50:22,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-03-10 22:50:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-03-10 22:50:25,487 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-03-10 22:50:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:50:25,487 INFO L480 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-03-10 22:50:25,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:25,487 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-03-10 22:50:26,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:50:26,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:50:26,463 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:50:26,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 22:50:26,663 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:50:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:50:26,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-03-10 22:50:26,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:50:26,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845213591] [2021-03-10 22:50:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:50:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:50:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:50:26,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845213591] [2021-03-10 22:50:26,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800316230] [2021-03-10 22:50:26,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:50:26,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:50:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:50:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:50:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:50:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:50:26,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:50:26,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-03-10 22:50:26,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71865138] [2021-03-10 22:50:26,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:50:26,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:50:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:50:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:50:26,920 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:50:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:50:36,247 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-03-10 22:50:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-03-10 22:50:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:50:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:50:40,195 INFO L225 Difference]: With dead ends: 557436 [2021-03-10 22:50:40,195 INFO L226 Difference]: Without dead ends: 555086 [2021-03-10 22:50:40,196 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1677.2ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-03-10 22:50:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-03-10 22:51:00,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-03-10 22:51:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-03-10 22:51:08,117 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-03-10 22:51:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:51:08,117 INFO L480 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-03-10 22:51:08,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-03-10 22:51:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:51:11,388 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:51:11,388 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:51:11,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:51:11,607 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:51:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:51:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-03-10 22:51:11,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:51:11,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002409246] [2021-03-10 22:51:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:51:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:51:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-03-10 22:51:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002409246] [2021-03-10 22:51:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751139800] [2021-03-10 22:51:11,666 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 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 [2021-03-10 22:51:11,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:51:11,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:51:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 22:51:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:51:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-03-10 22:51:11,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:51:11,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 22:51:11,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837658711] [2021-03-10 22:51:11,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:51:11,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:51:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:51:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:51:11,869 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:51:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:51:25,826 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-03-10 22:51:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:51:25,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:51:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:51:33,301 INFO L225 Difference]: With dead ends: 928977 [2021-03-10 22:51:33,301 INFO L226 Difference]: Without dead ends: 928257 [2021-03-10 22:51:33,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 22:51:35,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-03-10 22:52:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-03-10 22:52:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-03-10 22:52:13,266 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-03-10 22:52:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:52:13,267 INFO L480 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-03-10 22:52:13,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-03-10 22:52:16,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-03-10 22:52:16,783 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:52:16,783 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:52:16,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 22:52:16,998 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:52:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:52:16,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-03-10 22:52:16,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:52:16,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490321784] [2021-03-10 22:52:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:52:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:52:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 22:52:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490321784] [2021-03-10 22:52:17,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178842413] [2021-03-10 22:52:17,066 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 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 [2021-03-10 22:52:17,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:52:17,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:52:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 22:52:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:52:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:52:17,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:52:17,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-03-10 22:52:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671103795] [2021-03-10 22:52:17,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:52:17,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:52:17,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:52:17,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:52:17,251 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:52:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:52:35,679 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-03-10 22:52:35,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 22:52:35,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-03-10 22:52:35,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:52:48,619 INFO L225 Difference]: With dead ends: 1140384 [2021-03-10 22:52:48,619 INFO L226 Difference]: Without dead ends: 1137922 [2021-03-10 22:52:48,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 22:52:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. [2021-03-10 22:53:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137922 to 669469. [2021-03-10 22:53:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669469 states, 669468 states have (on average 4.940984483201587) internal successors, (3307831), 669468 states have internal predecessors, (3307831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669469 states to 669469 states and 3307831 transitions. [2021-03-10 22:53:31,102 INFO L78 Accepts]: Start accepts. Automaton has 669469 states and 3307831 transitions. Word has length 45 [2021-03-10 22:53:31,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:53:31,102 INFO L480 AbstractCegarLoop]: Abstraction has 669469 states and 3307831 transitions. [2021-03-10 22:53:31,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:53:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 669469 states and 3307831 transitions. Received shutdown request... [2021-03-10 22:53:31,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 22:53:31,950 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:53:31,953 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: clock still running: EmptinessCheckTime at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopStatisticsGenerator.getValue(CegarLoopStatisticsGenerator.java:146) at de.uni_freiburg.informatik.ultimate.util.statistics.StatisticsData.aggregateBenchmarkData(StatisticsData.java:60) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionBenchmarks.aggregateBenchmarkData(TraceAbstractionBenchmarks.java:55) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:354) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-03-10 22:53:31,955 INFO L168 Benchmark]: Toolchain (without parser) took 589333.68 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.7 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 9.4 GB. Max. memory is 16.0 GB. [2021-03-10 22:53:31,955 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:53:31,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:53:31,956 INFO L168 Benchmark]: Boogie Preprocessor took 18.33 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:53:31,956 INFO L168 Benchmark]: RCFGBuilder took 295.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 234.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. [2021-03-10 22:53:31,956 INFO L168 Benchmark]: TraceAbstraction took 588989.86 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 234.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 9.4 GB. Max. memory is 16.0 GB. [2021-03-10 22:53:31,956 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 178.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.08 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.33 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 295.45 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 234.6 MB in the end (delta: -1.1 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 588989.86 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 234.6 MB in the beginning and 6.6 GB in the end (delta: -6.3 GB). Peak memory consumption was 9.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while IsEmpty was searching accepting run (input had 669469 states). - ExceptionOrErrorResult: AssertionError: clock still running: EmptinessCheckTime de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: clock still running: EmptinessCheckTime: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopStatisticsGenerator.getValue(CegarLoopStatisticsGenerator.java:146) RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !SESSION 2021-03-10 22:43:41.021 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.9.1 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl Command-line arguments: -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-03-10 22:53:32.212 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772f3d75b/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/772f3d75b/.metadata/.log.