/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/figure1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:44:28,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:44:28,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:44:28,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:44:28,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 03:44:28,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 03:44:28,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 03:44:28,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 03:44:28,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 03:44:28,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 03:44:28,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 03:44:28,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 03:44:28,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 03:44:28,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 03:44:28,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 03:44:28,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 03:44:28,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-04-15 03:44:28,644 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 [2021-04-15 03:44:28,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:44:28,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:44:28,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:44:28,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:44:28,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:44:28,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:44:28,677 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:44:28,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:44:28,677 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:44:28,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:44:28,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:44:28,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:44:28,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:44:28,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:44:28,679 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:44:28,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:44:28,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:44:28,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:44:28,964 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:44:28,965 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:44:28,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl [2021-04-15 03:44:28,966 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1.wvr.bpl' [2021-04-15 03:44:29,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:44:29,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:44:29,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:44:29,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:44:29,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:44:29,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:44:29,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:44:29,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:44:29,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:44:29,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/1) ... [2021-04-15 03:44:29,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:44:29,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:44:29,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:44:29,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:44:29,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (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 [2021-04-15 03:44:29,109 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:44:29,109 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:44:29,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:44:29,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:44:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:44:29,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:44:29,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:44:29,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:44:29,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:44:29,111 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:44:29,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:44:29,216 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:44:29,217 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:44:29 BoogieIcfgContainer [2021-04-15 03:44:29,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:44:29,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:44:29,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:44:29,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:44:29,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:44:29" (1/2) ... [2021-04-15 03:44:29,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2870c19 and model type figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:44:29, skipping insertion in model container [2021-04-15 03:44:29,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:44:29" (2/2) ... [2021-04-15 03:44:29,222 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1.wvr.bpl [2021-04-15 03:44:29,226 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:44:29,226 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:44:29,228 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:44:29,228 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:44:29,253 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 03:44:29,264 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 03:44:29,278 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:44:29,278 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:44:29,278 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:44:29,279 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:44:29,279 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:44:29,283 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:44:29,284 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:44:29,284 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:44:29,289 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-04-15 03:44:29,297 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-04-15 03:44:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-04-15 03:44:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 03:44:29,302 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:29,303 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:29,303 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:29,306 INFO L82 PathProgramCache]: Analyzing trace with hash -155133599, now seen corresponding path program 1 times [2021-04-15 03:44:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:29,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670377781] [2021-04-15 03:44:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:29,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670377781] [2021-04-15 03:44:29,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:44:29,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:44:29,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108527111] [2021-04-15 03:44:29,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:44:29,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:29,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:44:29,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:44:29,471 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:29,495 INFO L93 Difference]: Finished difference Result 57 states and 100 transitions. [2021-04-15 03:44:29,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:44:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 03:44:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:29,506 INFO L225 Difference]: With dead ends: 57 [2021-04-15 03:44:29,507 INFO L226 Difference]: Without dead ends: 42 [2021-04-15 03:44:29,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:44:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-04-15 03:44:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-04-15 03:44:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 71 transitions. [2021-04-15 03:44:29,539 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 71 transitions. Word has length 14 [2021-04-15 03:44:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:29,539 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 71 transitions. [2021-04-15 03:44:29,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 71 transitions. [2021-04-15 03:44:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:44:29,541 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:29,541 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:29,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:44:29,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:29,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1800134561, now seen corresponding path program 1 times [2021-04-15 03:44:29,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:29,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254513293] [2021-04-15 03:44:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:29,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254513293] [2021-04-15 03:44:29,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058918641] [2021-04-15 03:44:29,647 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 [2021-04-15 03:44:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 03:44:29,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:29,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:29,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-04-15 03:44:29,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967511586] [2021-04-15 03:44:29,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:44:29,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:29,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:44:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:44:29,830 INFO L87 Difference]: Start difference. First operand 40 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:29,961 INFO L93 Difference]: Finished difference Result 63 states and 108 transitions. [2021-04-15 03:44:29,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:44:29,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:44:29,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:29,962 INFO L225 Difference]: With dead ends: 63 [2021-04-15 03:44:29,963 INFO L226 Difference]: Without dead ends: 63 [2021-04-15 03:44:29,963 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:44:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-04-15 03:44:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-04-15 03:44:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 80 transitions. [2021-04-15 03:44:29,968 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 80 transitions. Word has length 16 [2021-04-15 03:44:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:29,968 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 80 transitions. [2021-04-15 03:44:29,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 80 transitions. [2021-04-15 03:44:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:44:29,969 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:29,969 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:30,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 03:44:30,173 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1152959347, now seen corresponding path program 2 times [2021-04-15 03:44:30,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:30,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228590368] [2021-04-15 03:44:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:30,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228590368] [2021-04-15 03:44:30,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:44:30,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:44:30,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059831998] [2021-04-15 03:44:30,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:44:30,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:30,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:44:30,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:44:30,219 INFO L87 Difference]: Start difference. First operand 45 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:30,280 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-04-15 03:44:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:44:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:44:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:30,281 INFO L225 Difference]: With dead ends: 50 [2021-04-15 03:44:30,281 INFO L226 Difference]: Without dead ends: 48 [2021-04-15 03:44:30,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:44:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-15 03:44:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-04-15 03:44:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 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) [2021-04-15 03:44:30,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 76 transitions. [2021-04-15 03:44:30,285 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 76 transitions. Word has length 16 [2021-04-15 03:44:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:30,285 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 76 transitions. [2021-04-15 03:44:30,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:30,286 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 76 transitions. [2021-04-15 03:44:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 03:44:30,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:30,286 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:30,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:44:30,286 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 19790621, now seen corresponding path program 1 times [2021-04-15 03:44:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:30,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144685859] [2021-04-15 03:44:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:30,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144685859] [2021-04-15 03:44:30,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470969836] [2021-04-15 03:44:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:44:30,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:30,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:30,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 6 [2021-04-15 03:44:30,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38490155] [2021-04-15 03:44:30,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:44:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:44:30,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:44:30,426 INFO L87 Difference]: Start difference. First operand 43 states and 76 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:30,445 INFO L93 Difference]: Finished difference Result 96 states and 173 transitions. [2021-04-15 03:44:30,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:44:30,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-04-15 03:44:30,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:30,448 INFO L225 Difference]: With dead ends: 96 [2021-04-15 03:44:30,448 INFO L226 Difference]: Without dead ends: 75 [2021-04-15 03:44:30,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:44:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-04-15 03:44:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2021-04-15 03:44:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 109 transitions. [2021-04-15 03:44:30,462 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 109 transitions. Word has length 18 [2021-04-15 03:44:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:30,462 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 109 transitions. [2021-04-15 03:44:30,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 109 transitions. [2021-04-15 03:44:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:44:30,463 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:30,463 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:30,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:30,677 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:30,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1443468059, now seen corresponding path program 2 times [2021-04-15 03:44:30,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:30,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479449813] [2021-04-15 03:44:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479449813] [2021-04-15 03:44:30,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752416066] [2021-04-15 03:44:30,745 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 [2021-04-15 03:44:30,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:44:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:44:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:30,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:30,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-04-15 03:44:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863507291] [2021-04-15 03:44:30,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:44:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:30,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:44:30,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:44:30,902 INFO L87 Difference]: Start difference. First operand 58 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-04-15 03:44:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:31,166 INFO L93 Difference]: Finished difference Result 173 states and 308 transitions. [2021-04-15 03:44:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:44:31,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20 [2021-04-15 03:44:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:31,168 INFO L225 Difference]: With dead ends: 173 [2021-04-15 03:44:31,168 INFO L226 Difference]: Without dead ends: 167 [2021-04-15 03:44:31,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:44:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-04-15 03:44:31,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 67. [2021-04-15 03:44:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 129 transitions. [2021-04-15 03:44:31,172 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 129 transitions. Word has length 20 [2021-04-15 03:44:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:31,172 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 129 transitions. [2021-04-15 03:44:31,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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) [2021-04-15 03:44:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 129 transitions. [2021-04-15 03:44:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 03:44:31,173 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:31,173 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:31,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:31,389 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1693280397, now seen corresponding path program 3 times [2021-04-15 03:44:31,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:31,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178403751] [2021-04-15 03:44:31,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:31,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178403751] [2021-04-15 03:44:31,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687594189] [2021-04-15 03:44:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:31,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:44:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:44:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:31,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:31,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 03:44:31,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719886588] [2021-04-15 03:44:31,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:44:31,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:31,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:44:31,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:44:31,587 INFO L87 Difference]: Start difference. First operand 67 states and 129 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:31,832 INFO L93 Difference]: Finished difference Result 145 states and 267 transitions. [2021-04-15 03:44:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:44:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 03:44:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:31,834 INFO L225 Difference]: With dead ends: 145 [2021-04-15 03:44:31,834 INFO L226 Difference]: Without dead ends: 141 [2021-04-15 03:44:31,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:44:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-04-15 03:44:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 66. [2021-04-15 03:44:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 65 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 126 transitions. [2021-04-15 03:44:31,848 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 126 transitions. Word has length 20 [2021-04-15 03:44:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:31,848 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 126 transitions. [2021-04-15 03:44:31,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 126 transitions. [2021-04-15 03:44:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 03:44:31,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:31,849 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:32,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:32,063 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:32,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1024348455, now seen corresponding path program 4 times [2021-04-15 03:44:32,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:32,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573617230] [2021-04-15 03:44:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573617230] [2021-04-15 03:44:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604718291] [2021-04-15 03:44:32,115 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 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 [2021-04-15 03:44:32,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:44:32,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:32,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:44:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:32,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:32,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:44:32,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302493720] [2021-04-15 03:44:32,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:44:32,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:32,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:44:32,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:44:32,223 INFO L87 Difference]: Start difference. First operand 66 states and 126 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:32,243 INFO L93 Difference]: Finished difference Result 162 states and 309 transitions. [2021-04-15 03:44:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:44:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-04-15 03:44:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:32,244 INFO L225 Difference]: With dead ends: 162 [2021-04-15 03:44:32,244 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 03:44:32,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:44:32,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 03:44:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-04-15 03:44:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-04-15 03:44:32,248 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 22 [2021-04-15 03:44:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:32,248 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-04-15 03:44:32,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-04-15 03:44:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:44:32,249 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:32,249 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:32,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-04-15 03:44:32,464 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1876617257, now seen corresponding path program 5 times [2021-04-15 03:44:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:32,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226174447] [2021-04-15 03:44:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:32,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226174447] [2021-04-15 03:44:32,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590917113] [2021-04-15 03:44:32,541 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:32,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:44:32,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:32,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:32,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:32,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-04-15 03:44:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582204675] [2021-04-15 03:44:32,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:44:32,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:44:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:44:32,738 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:33,182 INFO L93 Difference]: Finished difference Result 364 states and 691 transitions. [2021-04-15 03:44:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:44:33,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:44:33,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:33,183 INFO L225 Difference]: With dead ends: 364 [2021-04-15 03:44:33,183 INFO L226 Difference]: Without dead ends: 334 [2021-04-15 03:44:33,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:44:33,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-04-15 03:44:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 92. [2021-04-15 03:44:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 91 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 179 transitions. [2021-04-15 03:44:33,187 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 179 transitions. Word has length 24 [2021-04-15 03:44:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:33,188 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 179 transitions. [2021-04-15 03:44:33,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,188 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 179 transitions. [2021-04-15 03:44:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 03:44:33,188 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:33,188 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:33,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:33,397 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:33,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:33,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1240439411, now seen corresponding path program 6 times [2021-04-15 03:44:33,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:33,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017651692] [2021-04-15 03:44:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:33,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017651692] [2021-04-15 03:44:33,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470248089] [2021-04-15 03:44:33,446 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 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 [2021-04-15 03:44:33,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:44:33,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2021-04-15 03:44:33,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:33,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:33,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-04-15 03:44:33,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317349409] [2021-04-15 03:44:33,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:44:33,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:33,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:44:33,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:44:33,595 INFO L87 Difference]: Start difference. First operand 92 states and 179 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:33,992 INFO L93 Difference]: Finished difference Result 239 states and 453 transitions. [2021-04-15 03:44:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:44:33,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 03:44:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:33,994 INFO L225 Difference]: With dead ends: 239 [2021-04-15 03:44:33,994 INFO L226 Difference]: Without dead ends: 235 [2021-04-15 03:44:33,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:44:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-04-15 03:44:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 84. [2021-04-15 03:44:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-04-15 03:44:33,999 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 24 [2021-04-15 03:44:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:33,999 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-04-15 03:44:33,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-04-15 03:44:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:44:34,000 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:34,000 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:34,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:34,215 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:34,215 INFO L82 PathProgramCache]: Analyzing trace with hash -465636203, now seen corresponding path program 7 times [2021-04-15 03:44:34,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:34,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689934962] [2021-04-15 03:44:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:34,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689934962] [2021-04-15 03:44:34,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370102333] [2021-04-15 03:44:34,281 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 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 [2021-04-15 03:44:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:34,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:44:34,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:34,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:34,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:44:34,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293216263] [2021-04-15 03:44:34,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:44:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:44:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:44:34,366 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:34,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:34,387 INFO L93 Difference]: Finished difference Result 221 states and 426 transitions. [2021-04-15 03:44:34,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:44:34,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:44:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:34,389 INFO L225 Difference]: With dead ends: 221 [2021-04-15 03:44:34,389 INFO L226 Difference]: Without dead ends: 188 [2021-04-15 03:44:34,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:44:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-04-15 03:44:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 145. [2021-04-15 03:44:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0833333333333335) internal successors, (300), 144 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 300 transitions. [2021-04-15 03:44:34,395 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 300 transitions. Word has length 26 [2021-04-15 03:44:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:34,395 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 300 transitions. [2021-04-15 03:44:34,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 300 transitions. [2021-04-15 03:44:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:44:34,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:34,398 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:34,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 03:44:34,613 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1485197677, now seen corresponding path program 8 times [2021-04-15 03:44:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:34,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465586452] [2021-04-15 03:44:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465586452] [2021-04-15 03:44:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673355170] [2021-04-15 03:44:34,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:44:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:44:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:44:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:34,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:34,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-04-15 03:44:34,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453801736] [2021-04-15 03:44:34,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:44:34,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:34,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:44:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:44:34,904 INFO L87 Difference]: Start difference. First operand 145 states and 300 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:35,614 INFO L93 Difference]: Finished difference Result 561 states and 1077 transitions. [2021-04-15 03:44:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:44:35,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:44:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:35,618 INFO L225 Difference]: With dead ends: 561 [2021-04-15 03:44:35,618 INFO L226 Difference]: Without dead ends: 495 [2021-04-15 03:44:35,619 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:44:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-04-15 03:44:35,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 114. [2021-04-15 03:44:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.991150442477876) internal successors, (225), 113 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 225 transitions. [2021-04-15 03:44:35,624 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 225 transitions. Word has length 28 [2021-04-15 03:44:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:35,624 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 225 transitions. [2021-04-15 03:44:35,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:35,625 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 225 transitions. [2021-04-15 03:44:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-04-15 03:44:35,625 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:35,625 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:35,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:35,830 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:35,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1081045901, now seen corresponding path program 9 times [2021-04-15 03:44:35,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:35,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292204650] [2021-04-15 03:44:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:35,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292204650] [2021-04-15 03:44:35,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923642068] [2021-04-15 03:44:35,895 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 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 [2021-04-15 03:44:35,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:44:35,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:35,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:44:35,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:36,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:36,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-04-15 03:44:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611628685] [2021-04-15 03:44:36,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:44:36,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:44:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:44:36,092 INFO L87 Difference]: Start difference. First operand 114 states and 225 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:36,685 INFO L93 Difference]: Finished difference Result 351 states and 677 transitions. [2021-04-15 03:44:36,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 03:44:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-04-15 03:44:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:36,687 INFO L225 Difference]: With dead ends: 351 [2021-04-15 03:44:36,687 INFO L226 Difference]: Without dead ends: 347 [2021-04-15 03:44:36,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 03:44:36,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-04-15 03:44:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 102. [2021-04-15 03:44:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-04-15 03:44:36,691 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 28 [2021-04-15 03:44:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:36,691 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-04-15 03:44:36,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-04-15 03:44:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-04-15 03:44:36,692 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:36,692 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:36,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:36,913 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:36,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2026425425, now seen corresponding path program 10 times [2021-04-15 03:44:36,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:36,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064764734] [2021-04-15 03:44:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:36,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064764734] [2021-04-15 03:44:36,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068622959] [2021-04-15 03:44:36,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:44:36,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:44:36,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:36,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:44:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:37,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-04-15 03:44:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884427507] [2021-04-15 03:44:37,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:44:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:44:37,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:44:37,098 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:37,136 INFO L93 Difference]: Finished difference Result 280 states and 543 transitions. [2021-04-15 03:44:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:44:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-04-15 03:44:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:37,137 INFO L225 Difference]: With dead ends: 280 [2021-04-15 03:44:37,137 INFO L226 Difference]: Without dead ends: 241 [2021-04-15 03:44:37,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:44:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-04-15 03:44:37,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 185. [2021-04-15 03:44:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1032608695652173) internal successors, (387), 184 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 387 transitions. [2021-04-15 03:44:37,141 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 387 transitions. Word has length 30 [2021-04-15 03:44:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:37,141 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 387 transitions. [2021-04-15 03:44:37,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 387 transitions. [2021-04-15 03:44:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:44:37,142 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:37,142 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:37,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-04-15 03:44:37,342 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:37,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1274697551, now seen corresponding path program 11 times [2021-04-15 03:44:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:37,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309897217] [2021-04-15 03:44:37,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309897217] [2021-04-15 03:44:37,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478370780] [2021-04-15 03:44:37,441 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 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 [2021-04-15 03:44:37,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:44:37,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:44:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:37,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:37,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-04-15 03:44:37,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929551377] [2021-04-15 03:44:37,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 03:44:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 03:44:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:44:37,673 INFO L87 Difference]: Start difference. First operand 185 states and 387 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-04-15 03:44:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:38,659 INFO L93 Difference]: Finished difference Result 786 states and 1519 transitions. [2021-04-15 03:44:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-04-15 03:44:38,659 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 32 [2021-04-15 03:44:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:38,661 INFO L225 Difference]: With dead ends: 786 [2021-04-15 03:44:38,661 INFO L226 Difference]: Without dead ends: 678 [2021-04-15 03:44:38,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 862.1ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 03:44:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-04-15 03:44:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 136. [2021-04-15 03:44:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.0074074074074075) internal successors, (271), 135 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 271 transitions. [2021-04-15 03:44:38,668 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 271 transitions. Word has length 32 [2021-04-15 03:44:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 271 transitions. [2021-04-15 03:44:38,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-04-15 03:44:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 271 transitions. [2021-04-15 03:44:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-04-15 03:44:38,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:38,669 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:38,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 03:44:38,884 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1086729587, now seen corresponding path program 12 times [2021-04-15 03:44:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:38,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70541375] [2021-04-15 03:44:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:38,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70541375] [2021-04-15 03:44:38,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88868852] [2021-04-15 03:44:38,958 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 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 [2021-04-15 03:44:38,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:44:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:38,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:44:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:39,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:39,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-04-15 03:44:39,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231098550] [2021-04-15 03:44:39,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 03:44:39,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:39,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 03:44:39,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:44:39,171 INFO L87 Difference]: Start difference. First operand 136 states and 271 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:40,051 INFO L93 Difference]: Finished difference Result 485 states and 945 transitions. [2021-04-15 03:44:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-04-15 03:44:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-04-15 03:44:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:40,053 INFO L225 Difference]: With dead ends: 485 [2021-04-15 03:44:40,053 INFO L226 Difference]: Without dead ends: 481 [2021-04-15 03:44:40,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-04-15 03:44:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-04-15 03:44:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 120. [2021-04-15 03:44:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0168067226890756) internal successors, (240), 119 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 240 transitions. [2021-04-15 03:44:40,058 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 240 transitions. Word has length 32 [2021-04-15 03:44:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:40,058 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 240 transitions. [2021-04-15 03:44:40,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 240 transitions. [2021-04-15 03:44:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-04-15 03:44:40,058 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:40,059 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:40,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 03:44:40,261 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash -4049395, now seen corresponding path program 13 times [2021-04-15 03:44:40,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:40,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200753964] [2021-04-15 03:44:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:40,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200753964] [2021-04-15 03:44:40,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705824196] [2021-04-15 03:44:40,319 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 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 [2021-04-15 03:44:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:44:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:40,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:40,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-04-15 03:44:40,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842873010] [2021-04-15 03:44:40,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:44:40,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:44:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:44:40,454 INFO L87 Difference]: Start difference. First operand 120 states and 240 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:40,490 INFO L93 Difference]: Finished difference Result 339 states and 660 transitions. [2021-04-15 03:44:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:44:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-04-15 03:44:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:40,492 INFO L225 Difference]: With dead ends: 339 [2021-04-15 03:44:40,492 INFO L226 Difference]: Without dead ends: 294 [2021-04-15 03:44:40,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:44:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-04-15 03:44:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-04-15 03:44:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1160714285714284) internal successors, (474), 224 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 474 transitions. [2021-04-15 03:44:40,498 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 474 transitions. Word has length 34 [2021-04-15 03:44:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:40,498 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 474 transitions. [2021-04-15 03:44:40,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 474 transitions. [2021-04-15 03:44:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:40,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:40,499 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:40,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:40,713 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2031751691, now seen corresponding path program 14 times [2021-04-15 03:44:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483584149] [2021-04-15 03:44:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:40,829 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483584149] [2021-04-15 03:44:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882546612] [2021-04-15 03:44:40,829 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 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 [2021-04-15 03:44:40,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:44:40,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:44:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:41,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:41,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-04-15 03:44:41,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020264516] [2021-04-15 03:44:41,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 03:44:41,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:41,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 03:44:41,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:44:41,107 INFO L87 Difference]: Start difference. First operand 225 states and 474 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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) [2021-04-15 03:44:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:42,494 INFO L93 Difference]: Finished difference Result 1039 states and 2017 transitions. [2021-04-15 03:44:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-04-15 03:44:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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 36 [2021-04-15 03:44:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:42,497 INFO L225 Difference]: With dead ends: 1039 [2021-04-15 03:44:42,497 INFO L226 Difference]: Without dead ends: 883 [2021-04-15 03:44:42,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1225.0ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 03:44:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-04-15 03:44:42,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 158. [2021-04-15 03:44:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.0191082802547773) internal successors, (317), 157 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 317 transitions. [2021-04-15 03:44:42,504 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 317 transitions. Word has length 36 [2021-04-15 03:44:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:42,504 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 317 transitions. [2021-04-15 03:44:42,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 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) [2021-04-15 03:44:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 317 transitions. [2021-04-15 03:44:42,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:44:42,505 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:42,505 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:42,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:44:42,720 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:42,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1527693965, now seen corresponding path program 15 times [2021-04-15 03:44:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:42,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982342330] [2021-04-15 03:44:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:42,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982342330] [2021-04-15 03:44:42,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106503275] [2021-04-15 03:44:42,791 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 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 [2021-04-15 03:44:42,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:44:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:44:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:43,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-04-15 03:44:43,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163776087] [2021-04-15 03:44:43,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:44:43,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:44:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:44:43,051 INFO L87 Difference]: Start difference. First operand 158 states and 317 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:44,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:44,335 INFO L93 Difference]: Finished difference Result 641 states and 1257 transitions. [2021-04-15 03:44:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 03:44:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:44:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:44,337 INFO L225 Difference]: With dead ends: 641 [2021-04-15 03:44:44,337 INFO L226 Difference]: Without dead ends: 637 [2021-04-15 03:44:44,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1173.6ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-04-15 03:44:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-04-15 03:44:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 138. [2021-04-15 03:44:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0291970802919708) internal successors, (278), 137 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 278 transitions. [2021-04-15 03:44:44,343 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 278 transitions. Word has length 36 [2021-04-15 03:44:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:44,343 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 278 transitions. [2021-04-15 03:44:44,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 278 transitions. [2021-04-15 03:44:44,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-04-15 03:44:44,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:44,344 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:44,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 03:44:44,553 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:44,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1675506121, now seen corresponding path program 16 times [2021-04-15 03:44:44,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:44,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963297669] [2021-04-15 03:44:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:44,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963297669] [2021-04-15 03:44:44,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143852584] [2021-04-15 03:44:44,624 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:44,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:44:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:44:44,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:44,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:44,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-04-15 03:44:44,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225085924] [2021-04-15 03:44:44,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:44:44,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:44:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:44:44,777 INFO L87 Difference]: Start difference. First operand 138 states and 278 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) [2021-04-15 03:44:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:44,854 INFO L93 Difference]: Finished difference Result 398 states and 777 transitions. [2021-04-15 03:44:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:44:44,854 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 38 [2021-04-15 03:44:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:44,855 INFO L225 Difference]: With dead ends: 398 [2021-04-15 03:44:44,855 INFO L226 Difference]: Without dead ends: 347 [2021-04-15 03:44:44,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:44:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-04-15 03:44:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2021-04-15 03:44:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.125) internal successors, (561), 264 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 561 transitions. [2021-04-15 03:44:44,860 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 561 transitions. Word has length 38 [2021-04-15 03:44:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:44,860 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 561 transitions. [2021-04-15 03:44:44,860 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) [2021-04-15 03:44:44,860 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 561 transitions. [2021-04-15 03:44:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 03:44:44,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:44,860 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:45,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:45,075 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1976295111, now seen corresponding path program 17 times [2021-04-15 03:44:45,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:45,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890117940] [2021-04-15 03:44:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890117940] [2021-04-15 03:44:45,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091094401] [2021-04-15 03:44:45,213 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 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 [2021-04-15 03:44:45,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:44:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:44:45,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:45,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:45,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-04-15 03:44:45,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13044499] [2021-04-15 03:44:45,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 03:44:45,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:45,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 03:44:45,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:44:45,532 INFO L87 Difference]: Start difference. First operand 265 states and 561 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:47,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:47,431 INFO L93 Difference]: Finished difference Result 1320 states and 2571 transitions. [2021-04-15 03:44:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-04-15 03:44:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-04-15 03:44:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:47,435 INFO L225 Difference]: With dead ends: 1320 [2021-04-15 03:44:47,435 INFO L226 Difference]: Without dead ends: 1110 [2021-04-15 03:44:47,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3798 ImplicationChecksByTransitivity, 1667.5ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-04-15 03:44:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-04-15 03:44:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 180. [2021-04-15 03:44:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.0279329608938546) internal successors, (363), 179 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 363 transitions. [2021-04-15 03:44:47,443 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 363 transitions. Word has length 40 [2021-04-15 03:44:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:47,443 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 363 transitions. [2021-04-15 03:44:47,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 363 transitions. [2021-04-15 03:44:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-04-15 03:44:47,444 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:47,444 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:47,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:47,657 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:47,657 INFO L82 PathProgramCache]: Analyzing trace with hash -302152819, now seen corresponding path program 18 times [2021-04-15 03:44:47,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:47,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953144692] [2021-04-15 03:44:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953144692] [2021-04-15 03:44:47,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159425039] [2021-04-15 03:44:47,731 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 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 [2021-04-15 03:44:47,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:44:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:47,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:44:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:48,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:48,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-04-15 03:44:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873025197] [2021-04-15 03:44:48,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-04-15 03:44:48,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-04-15 03:44:48,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:44:48,070 INFO L87 Difference]: Start difference. First operand 180 states and 363 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-04-15 03:44:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:49,856 INFO L93 Difference]: Finished difference Result 819 states and 1613 transitions. [2021-04-15 03:44:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-04-15 03:44:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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 40 [2021-04-15 03:44:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:49,859 INFO L225 Difference]: With dead ends: 819 [2021-04-15 03:44:49,859 INFO L226 Difference]: Without dead ends: 815 [2021-04-15 03:44:49,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 1659.4ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-04-15 03:44:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-04-15 03:44:49,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 156. [2021-04-15 03:44:49,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.0387096774193547) internal successors, (316), 155 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 316 transitions. [2021-04-15 03:44:49,865 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 316 transitions. Word has length 40 [2021-04-15 03:44:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:49,865 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 316 transitions. [2021-04-15 03:44:49,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 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) [2021-04-15 03:44:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 316 transitions. [2021-04-15 03:44:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-04-15 03:44:49,866 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:49,866 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:50,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:50,081 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -78659707, now seen corresponding path program 19 times [2021-04-15 03:44:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:50,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430109464] [2021-04-15 03:44:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:50,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430109464] [2021-04-15 03:44:50,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400986744] [2021-04-15 03:44:50,157 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 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 [2021-04-15 03:44:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:44:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:50,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-04-15 03:44:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781140038] [2021-04-15 03:44:50,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:44:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:44:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:44:50,321 INFO L87 Difference]: Start difference. First operand 156 states and 316 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:50,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:50,395 INFO L93 Difference]: Finished difference Result 457 states and 894 transitions. [2021-04-15 03:44:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:44:50,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-04-15 03:44:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:50,397 INFO L225 Difference]: With dead ends: 457 [2021-04-15 03:44:50,397 INFO L226 Difference]: Without dead ends: 400 [2021-04-15 03:44:50,397 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:44:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-04-15 03:44:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 305. [2021-04-15 03:44:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.1315789473684212) internal successors, (648), 304 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 648 transitions. [2021-04-15 03:44:50,401 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 648 transitions. Word has length 42 [2021-04-15 03:44:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:50,401 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 648 transitions. [2021-04-15 03:44:50,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:50,402 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 648 transitions. [2021-04-15 03:44:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-15 03:44:50,402 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:50,402 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:50,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 03:44:50,615 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash -729629309, now seen corresponding path program 20 times [2021-04-15 03:44:50,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:50,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92044722] [2021-04-15 03:44:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:50,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92044722] [2021-04-15 03:44:50,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426637105] [2021-04-15 03:44:50,773 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 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 [2021-04-15 03:44:50,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:44:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:44:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:51,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:51,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-04-15 03:44:51,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161360056] [2021-04-15 03:44:51,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 03:44:51,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 03:44:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:44:51,131 INFO L87 Difference]: Start difference. First operand 305 states and 648 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:53,609 INFO L93 Difference]: Finished difference Result 1629 states and 3181 transitions. [2021-04-15 03:44:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-04-15 03:44:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-04-15 03:44:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:53,613 INFO L225 Difference]: With dead ends: 1629 [2021-04-15 03:44:53,613 INFO L226 Difference]: Without dead ends: 1359 [2021-04-15 03:44:53,614 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 2156.9ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-04-15 03:44:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-04-15 03:44:53,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 202. [2021-04-15 03:44:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0348258706467663) internal successors, (409), 201 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 409 transitions. [2021-04-15 03:44:53,621 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 409 transitions. Word has length 44 [2021-04-15 03:44:53,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:53,621 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 409 transitions. [2021-04-15 03:44:53,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:53,621 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 409 transitions. [2021-04-15 03:44:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-04-15 03:44:53,621 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:53,622 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:53,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 03:44:53,827 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:53,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:53,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1199920525, now seen corresponding path program 21 times [2021-04-15 03:44:53,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:53,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249647123] [2021-04-15 03:44:53,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:53,918 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249647123] [2021-04-15 03:44:53,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205341956] [2021-04-15 03:44:53,919 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:44:53,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-15 03:44:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:44:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:54,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:54,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-04-15 03:44:54,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179484097] [2021-04-15 03:44:54,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 03:44:54,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:54,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 03:44:54,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:44:54,314 INFO L87 Difference]: Start difference. First operand 202 states and 409 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:56,533 INFO L93 Difference]: Finished difference Result 1019 states and 2013 transitions. [2021-04-15 03:44:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-04-15 03:44:56,533 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-04-15 03:44:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:56,536 INFO L225 Difference]: With dead ends: 1019 [2021-04-15 03:44:56,536 INFO L226 Difference]: Without dead ends: 1015 [2021-04-15 03:44:56,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5830 ImplicationChecksByTransitivity, 2097.3ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-04-15 03:44:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-04-15 03:44:56,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 174. [2021-04-15 03:44:56,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.046242774566474) internal successors, (354), 173 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 354 transitions. [2021-04-15 03:44:56,542 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 354 transitions. Word has length 44 [2021-04-15 03:44:56,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:56,542 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 354 transitions. [2021-04-15 03:44:56,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 354 transitions. [2021-04-15 03:44:56,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:44:56,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:56,542 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:56,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:56,753 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2016813247, now seen corresponding path program 22 times [2021-04-15 03:44:56,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:56,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122755107] [2021-04-15 03:44:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:56,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122755107] [2021-04-15 03:44:56,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602202947] [2021-04-15 03:44:56,825 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:44:56,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:44:56,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:56,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:44:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 64 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:57,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-04-15 03:44:57,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313566029] [2021-04-15 03:44:57,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 03:44:57,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 03:44:57,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:44:57,055 INFO L87 Difference]: Start difference. First operand 174 states and 354 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:44:57,144 INFO L93 Difference]: Finished difference Result 516 states and 1011 transitions. [2021-04-15 03:44:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:44:57,145 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 03:44:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:44:57,146 INFO L225 Difference]: With dead ends: 516 [2021-04-15 03:44:57,146 INFO L226 Difference]: Without dead ends: 453 [2021-04-15 03:44:57,146 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:44:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-04-15 03:44:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 345. [2021-04-15 03:44:57,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.136627906976744) internal successors, (735), 344 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 735 transitions. [2021-04-15 03:44:57,150 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 735 transitions. Word has length 46 [2021-04-15 03:44:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:44:57,151 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 735 transitions. [2021-04-15 03:44:57,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 20 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:44:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 735 transitions. [2021-04-15 03:44:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-04-15 03:44:57,151 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:44:57,151 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:44:57,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 03:44:57,365 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:44:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:44:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1932635711, now seen corresponding path program 23 times [2021-04-15 03:44:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:44:57,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755437166] [2021-04-15 03:44:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:44:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:44:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:57,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755437166] [2021-04-15 03:44:57,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670173729] [2021-04-15 03:44:57,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:44:57,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:44:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:44:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:44:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:44:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:44:58,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:44:58,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-04-15 03:44:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702374098] [2021-04-15 03:44:58,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-04-15 03:44:58,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:44:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-04-15 03:44:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:44:58,024 INFO L87 Difference]: Start difference. First operand 345 states and 735 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:01,249 INFO L93 Difference]: Finished difference Result 1966 states and 3847 transitions. [2021-04-15 03:45:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-04-15 03:45:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-04-15 03:45:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:01,253 INFO L225 Difference]: With dead ends: 1966 [2021-04-15 03:45:01,253 INFO L226 Difference]: Without dead ends: 1630 [2021-04-15 03:45:01,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8718 ImplicationChecksByTransitivity, 2870.8ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-04-15 03:45:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-04-15 03:45:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 224. [2021-04-15 03:45:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.0403587443946187) internal successors, (455), 223 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 455 transitions. [2021-04-15 03:45:01,265 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 455 transitions. Word has length 48 [2021-04-15 03:45:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:01,265 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 455 transitions. [2021-04-15 03:45:01,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:01,265 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 455 transitions. [2021-04-15 03:45:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-04-15 03:45:01,266 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:01,266 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:01,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:01,481 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1888843917, now seen corresponding path program 24 times [2021-04-15 03:45:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:01,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273667746] [2021-04-15 03:45:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:01,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273667746] [2021-04-15 03:45:01,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490409195] [2021-04-15 03:45:01,592 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 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 [2021-04-15 03:45:01,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-04-15 03:45:01,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:45:01,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:02,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:02,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-04-15 03:45:02,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662305903] [2021-04-15 03:45:02,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-04-15 03:45:02,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:02,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-04-15 03:45:02,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:45:02,029 INFO L87 Difference]: Start difference. First operand 224 states and 455 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:04,972 INFO L93 Difference]: Finished difference Result 1241 states and 2457 transitions. [2021-04-15 03:45:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-04-15 03:45:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-04-15 03:45:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:04,975 INFO L225 Difference]: With dead ends: 1241 [2021-04-15 03:45:04,976 INFO L226 Difference]: Without dead ends: 1237 [2021-04-15 03:45:04,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8653 ImplicationChecksByTransitivity, 2783.9ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-04-15 03:45:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-04-15 03:45:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 192. [2021-04-15 03:45:04,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.0523560209424083) internal successors, (392), 191 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 392 transitions. [2021-04-15 03:45:04,982 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 392 transitions. Word has length 48 [2021-04-15 03:45:04,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:04,982 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 392 transitions. [2021-04-15 03:45:04,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 392 transitions. [2021-04-15 03:45:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-04-15 03:45:04,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:04,983 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:05,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 03:45:05,198 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash 914329853, now seen corresponding path program 25 times [2021-04-15 03:45:05,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:05,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287212395] [2021-04-15 03:45:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287212395] [2021-04-15 03:45:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860195657] [2021-04-15 03:45:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:45:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 03:45:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 81 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:05,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:05,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-04-15 03:45:05,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385730668] [2021-04-15 03:45:05,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:45:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:05,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:45:05,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:45:05,581 INFO L87 Difference]: Start difference. First operand 192 states and 392 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:05,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:05,693 INFO L93 Difference]: Finished difference Result 575 states and 1128 transitions. [2021-04-15 03:45:05,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:45:05,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-04-15 03:45:05,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:05,695 INFO L225 Difference]: With dead ends: 575 [2021-04-15 03:45:05,695 INFO L226 Difference]: Without dead ends: 506 [2021-04-15 03:45:05,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:45:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-04-15 03:45:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 385. [2021-04-15 03:45:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.140625) internal successors, (822), 384 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 822 transitions. [2021-04-15 03:45:05,702 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 822 transitions. Word has length 50 [2021-04-15 03:45:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:05,702 INFO L480 AbstractCegarLoop]: Abstraction has 385 states and 822 transitions. [2021-04-15 03:45:05,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 822 transitions. [2021-04-15 03:45:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-04-15 03:45:05,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:05,703 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:05,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:45:05,917 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:05,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2068558075, now seen corresponding path program 26 times [2021-04-15 03:45:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:05,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333467166] [2021-04-15 03:45:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:06,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333467166] [2021-04-15 03:45:06,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15542146] [2021-04-15 03:45:06,163 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 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 [2021-04-15 03:45:06,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:45:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:06,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:45:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:06,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:06,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-04-15 03:45:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895546065] [2021-04-15 03:45:06,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-04-15 03:45:06,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:06,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-04-15 03:45:06,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-04-15 03:45:06,733 INFO L87 Difference]: Start difference. First operand 385 states and 822 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:11,066 INFO L93 Difference]: Finished difference Result 2331 states and 4569 transitions. [2021-04-15 03:45:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-04-15 03:45:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-04-15 03:45:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:11,071 INFO L225 Difference]: With dead ends: 2331 [2021-04-15 03:45:11,071 INFO L226 Difference]: Without dead ends: 1923 [2021-04-15 03:45:11,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12499 ImplicationChecksByTransitivity, 3876.3ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-04-15 03:45:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-04-15 03:45:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 246. [2021-04-15 03:45:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0448979591836736) internal successors, (501), 245 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 501 transitions. [2021-04-15 03:45:11,079 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 501 transitions. Word has length 52 [2021-04-15 03:45:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:11,079 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 501 transitions. [2021-04-15 03:45:11,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 501 transitions. [2021-04-15 03:45:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-04-15 03:45:11,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:11,080 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:11,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 03:45:11,293 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -275960691, now seen corresponding path program 27 times [2021-04-15 03:45:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:11,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001904405] [2021-04-15 03:45:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:11,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001904405] [2021-04-15 03:45:11,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467448521] [2021-04-15 03:45:11,437 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 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 [2021-04-15 03:45:11,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-04-15 03:45:11,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:11,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:45:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:11,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:11,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-04-15 03:45:11,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388369454] [2021-04-15 03:45:11,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 03:45:11,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 03:45:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:45:11,993 INFO L87 Difference]: Start difference. First operand 246 states and 501 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:15,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:15,892 INFO L93 Difference]: Finished difference Result 1485 states and 2945 transitions. [2021-04-15 03:45:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-04-15 03:45:15,892 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-04-15 03:45:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:15,895 INFO L225 Difference]: With dead ends: 1485 [2021-04-15 03:45:15,895 INFO L226 Difference]: Without dead ends: 1481 [2021-04-15 03:45:15,897 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 3691.4ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-04-15 03:45:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-04-15 03:45:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 210. [2021-04-15 03:45:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.0574162679425836) internal successors, (430), 209 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 430 transitions. [2021-04-15 03:45:15,903 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 430 transitions. Word has length 52 [2021-04-15 03:45:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:15,903 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 430 transitions. [2021-04-15 03:45:15,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 35 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 430 transitions. [2021-04-15 03:45:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-04-15 03:45:15,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:15,903 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:16,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:16,107 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:16,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1608264519, now seen corresponding path program 28 times [2021-04-15 03:45:16,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:16,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011575144] [2021-04-15 03:45:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011575144] [2021-04-15 03:45:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326507989] [2021-04-15 03:45:16,247 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 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 [2021-04-15 03:45:16,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:45:16,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:16,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2021-04-15 03:45:16,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 100 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:16,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:16,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-04-15 03:45:16,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344317260] [2021-04-15 03:45:16,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 03:45:16,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 03:45:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:45:16,557 INFO L87 Difference]: Start difference. First operand 210 states and 430 transitions. Second operand has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:16,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:16,675 INFO L93 Difference]: Finished difference Result 634 states and 1245 transitions. [2021-04-15 03:45:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:45:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-04-15 03:45:16,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:16,677 INFO L225 Difference]: With dead ends: 634 [2021-04-15 03:45:16,677 INFO L226 Difference]: Without dead ends: 559 [2021-04-15 03:45:16,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:45:16,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-04-15 03:45:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 425. [2021-04-15 03:45:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.143867924528302) internal successors, (909), 424 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 909 transitions. [2021-04-15 03:45:16,682 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 909 transitions. Word has length 54 [2021-04-15 03:45:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:16,682 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 909 transitions. [2021-04-15 03:45:16,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.25) internal successors, (102), 24 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 909 transitions. [2021-04-15 03:45:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:45:16,683 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:16,683 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:16,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 03:45:16,891 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1640220087, now seen corresponding path program 29 times [2021-04-15 03:45:16,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:16,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060815357] [2021-04-15 03:45:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:17,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060815357] [2021-04-15 03:45:17,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913371876] [2021-04-15 03:45:17,172 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 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 [2021-04-15 03:45:17,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-04-15 03:45:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 03:45:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:17,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:17,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-04-15 03:45:17,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906027552] [2021-04-15 03:45:17,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-04-15 03:45:17,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-04-15 03:45:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-04-15 03:45:17,790 INFO L87 Difference]: Start difference. First operand 425 states and 909 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:23,266 INFO L93 Difference]: Finished difference Result 2724 states and 5347 transitions. [2021-04-15 03:45:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-04-15 03:45:23,267 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:45:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:23,272 INFO L225 Difference]: With dead ends: 2724 [2021-04-15 03:45:23,272 INFO L226 Difference]: Without dead ends: 2238 [2021-04-15 03:45:23,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 4811.7ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-04-15 03:45:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-04-15 03:45:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 268. [2021-04-15 03:45:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.048689138576779) internal successors, (547), 267 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 547 transitions. [2021-04-15 03:45:23,282 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 547 transitions. Word has length 56 [2021-04-15 03:45:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:23,282 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 547 transitions. [2021-04-15 03:45:23,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 547 transitions. [2021-04-15 03:45:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:45:23,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:23,283 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:23,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:23,497 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash 205238669, now seen corresponding path program 30 times [2021-04-15 03:45:23,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:23,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316589358] [2021-04-15 03:45:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:23,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316589358] [2021-04-15 03:45:23,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117295365] [2021-04-15 03:45:23,634 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:23,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-04-15 03:45:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 03:45:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-04-15 03:45:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488688056] [2021-04-15 03:45:24,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-04-15 03:45:24,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-04-15 03:45:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:45:24,207 INFO L87 Difference]: Start difference. First operand 268 states and 547 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:28,912 INFO L93 Difference]: Finished difference Result 1751 states and 3477 transitions. [2021-04-15 03:45:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-04-15 03:45:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:45:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:28,915 INFO L225 Difference]: With dead ends: 1751 [2021-04-15 03:45:28,915 INFO L226 Difference]: Without dead ends: 1747 [2021-04-15 03:45:28,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17241 ImplicationChecksByTransitivity, 4453.0ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-04-15 03:45:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-04-15 03:45:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 228. [2021-04-15 03:45:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.0616740088105727) internal successors, (468), 227 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 468 transitions. [2021-04-15 03:45:28,923 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 468 transitions. Word has length 56 [2021-04-15 03:45:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:28,924 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 468 transitions. [2021-04-15 03:45:28,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 38 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 468 transitions. [2021-04-15 03:45:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-04-15 03:45:28,924 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:28,924 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:29,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 03:45:29,137 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:29,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -924210571, now seen corresponding path program 31 times [2021-04-15 03:45:29,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:29,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623765184] [2021-04-15 03:45:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623765184] [2021-04-15 03:45:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173164976] [2021-04-15 03:45:29,255 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 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 [2021-04-15 03:45:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:29,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2021-04-15 03:45:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 121 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:29,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:29,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-04-15 03:45:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560339892] [2021-04-15 03:45:29,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-04-15 03:45:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-04-15 03:45:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:45:29,587 INFO L87 Difference]: Start difference. First operand 228 states and 468 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:29,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:29,741 INFO L93 Difference]: Finished difference Result 693 states and 1362 transitions. [2021-04-15 03:45:29,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:45:29,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-04-15 03:45:29,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:29,746 INFO L225 Difference]: With dead ends: 693 [2021-04-15 03:45:29,746 INFO L226 Difference]: Without dead ends: 612 [2021-04-15 03:45:29,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:45:29,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-04-15 03:45:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-04-15 03:45:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.146551724137931) internal successors, (996), 464 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 996 transitions. [2021-04-15 03:45:29,751 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 996 transitions. Word has length 58 [2021-04-15 03:45:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:29,751 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 996 transitions. [2021-04-15 03:45:29,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 996 transitions. [2021-04-15 03:45:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-04-15 03:45:29,752 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:29,752 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:29,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 03:45:29,966 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:29,967 INFO L82 PathProgramCache]: Analyzing trace with hash -418583437, now seen corresponding path program 32 times [2021-04-15 03:45:29,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:29,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741059032] [2021-04-15 03:45:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741059032] [2021-04-15 03:45:30,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546743978] [2021-04-15 03:45:30,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:45:30,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:45:30,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:30,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:45:30,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:30,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:30,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-04-15 03:45:30,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17915034] [2021-04-15 03:45:30,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-04-15 03:45:30,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:30,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-04-15 03:45:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:45:30,980 INFO L87 Difference]: Start difference. First operand 465 states and 996 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:37,849 INFO L93 Difference]: Finished difference Result 3145 states and 6181 transitions. [2021-04-15 03:45:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-04-15 03:45:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-04-15 03:45:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:37,852 INFO L225 Difference]: With dead ends: 3145 [2021-04-15 03:45:37,853 INFO L226 Difference]: Without dead ends: 2575 [2021-04-15 03:45:37,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23656 ImplicationChecksByTransitivity, 6002.3ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-04-15 03:45:37,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2575 states. [2021-04-15 03:45:37,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2575 to 290. [2021-04-15 03:45:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.0519031141868513) internal successors, (593), 289 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 593 transitions. [2021-04-15 03:45:37,864 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 593 transitions. Word has length 60 [2021-04-15 03:45:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:37,864 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 593 transitions. [2021-04-15 03:45:37,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 593 transitions. [2021-04-15 03:45:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-04-15 03:45:37,865 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:37,865 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:38,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 03:45:38,073 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash 333465485, now seen corresponding path program 33 times [2021-04-15 03:45:38,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:38,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44612245] [2021-04-15 03:45:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44612245] [2021-04-15 03:45:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314458096] [2021-04-15 03:45:38,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:38,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-04-15 03:45:38,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:45:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:38,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:38,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-04-15 03:45:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730510153] [2021-04-15 03:45:38,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-04-15 03:45:38,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:38,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-04-15 03:45:38,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:45:38,991 INFO L87 Difference]: Start difference. First operand 290 states and 593 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:44,816 INFO L93 Difference]: Finished difference Result 2039 states and 4053 transitions. [2021-04-15 03:45:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-04-15 03:45:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-04-15 03:45:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:44,819 INFO L225 Difference]: With dead ends: 2039 [2021-04-15 03:45:44,819 INFO L226 Difference]: Without dead ends: 2035 [2021-04-15 03:45:44,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23386 ImplicationChecksByTransitivity, 5433.4ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-04-15 03:45:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-04-15 03:45:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 246. [2021-04-15 03:45:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0653061224489795) internal successors, (506), 245 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 506 transitions. [2021-04-15 03:45:44,828 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 506 transitions. Word has length 60 [2021-04-15 03:45:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:44,828 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 506 transitions. [2021-04-15 03:45:44,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 41 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 506 transitions. [2021-04-15 03:45:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-04-15 03:45:44,829 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:44,829 INFO L551 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:45,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 03:45:45,030 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:45,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:45,030 INFO L82 PathProgramCache]: Analyzing trace with hash 545526321, now seen corresponding path program 34 times [2021-04-15 03:45:45,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:45,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444312303] [2021-04-15 03:45:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:45,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444312303] [2021-04-15 03:45:45,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500179375] [2021-04-15 03:45:45,178 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:45:45,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:45:45,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:45,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2021-04-15 03:45:45,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 144 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:45,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:45,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-04-15 03:45:45,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678114634] [2021-04-15 03:45:45,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-04-15 03:45:45,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:45,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-04-15 03:45:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:45:45,572 INFO L87 Difference]: Start difference. First operand 246 states and 506 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:45,790 INFO L93 Difference]: Finished difference Result 752 states and 1479 transitions. [2021-04-15 03:45:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:45:45,791 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-04-15 03:45:45,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:45,792 INFO L225 Difference]: With dead ends: 752 [2021-04-15 03:45:45,792 INFO L226 Difference]: Without dead ends: 665 [2021-04-15 03:45:45,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:45:45,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-04-15 03:45:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 505. [2021-04-15 03:45:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1488095238095237) internal successors, (1083), 504 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1083 transitions. [2021-04-15 03:45:45,797 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1083 transitions. Word has length 62 [2021-04-15 03:45:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:45,797 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 1083 transitions. [2021-04-15 03:45:45,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1083 transitions. [2021-04-15 03:45:45,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-15 03:45:45,801 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:45,801 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:46,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 03:45:46,010 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:46,011 INFO L82 PathProgramCache]: Analyzing trace with hash 387589423, now seen corresponding path program 35 times [2021-04-15 03:45:46,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:46,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462502513] [2021-04-15 03:45:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:46,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462502513] [2021-04-15 03:45:46,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408572086] [2021-04-15 03:45:46,390 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 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 [2021-04-15 03:45:46,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-04-15 03:45:46,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:46,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:45:46,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:47,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:47,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-04-15 03:45:47,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426358097] [2021-04-15 03:45:47,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-04-15 03:45:47,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:47,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-04-15 03:45:47,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-04-15 03:45:47,200 INFO L87 Difference]: Start difference. First operand 505 states and 1083 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:55,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:45:55,444 INFO L93 Difference]: Finished difference Result 3594 states and 7071 transitions. [2021-04-15 03:45:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-04-15 03:45:55,445 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-15 03:45:55,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:45:55,448 INFO L225 Difference]: With dead ends: 3594 [2021-04-15 03:45:55,448 INFO L226 Difference]: Without dead ends: 2934 [2021-04-15 03:45:55,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31467 ImplicationChecksByTransitivity, 7301.1ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-04-15 03:45:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-04-15 03:45:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 312. [2021-04-15 03:45:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.054662379421222) internal successors, (639), 311 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 639 transitions. [2021-04-15 03:45:55,462 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 639 transitions. Word has length 64 [2021-04-15 03:45:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:45:55,462 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 639 transitions. [2021-04-15 03:45:55,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:45:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 639 transitions. [2021-04-15 03:45:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-04-15 03:45:55,462 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:45:55,463 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:45:55,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:45:55,677 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:45:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:45:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1658179955, now seen corresponding path program 36 times [2021-04-15 03:45:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:45:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759403541] [2021-04-15 03:45:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:45:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:45:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:55,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759403541] [2021-04-15 03:45:55,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300359760] [2021-04-15 03:45:55,866 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 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 [2021-04-15 03:45:55,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-04-15 03:45:55,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:45:55,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2021-04-15 03:45:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:45:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:45:56,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:45:56,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-04-15 03:45:56,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770238180] [2021-04-15 03:45:56,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-04-15 03:45:56,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:45:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-04-15 03:45:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-04-15 03:45:56,647 INFO L87 Difference]: Start difference. First operand 312 states and 639 transitions. Second operand has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:03,800 INFO L93 Difference]: Finished difference Result 2349 states and 4673 transitions. [2021-04-15 03:46:03,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-04-15 03:46:03,800 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-04-15 03:46:03,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:03,803 INFO L225 Difference]: With dead ends: 2349 [2021-04-15 03:46:03,803 INFO L226 Difference]: Without dead ends: 2345 [2021-04-15 03:46:03,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31046 ImplicationChecksByTransitivity, 6727.1ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-04-15 03:46:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-04-15 03:46:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 264. [2021-04-15 03:46:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.068441064638783) internal successors, (544), 263 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 544 transitions. [2021-04-15 03:46:03,813 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 544 transitions. Word has length 64 [2021-04-15 03:46:03,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:03,813 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 544 transitions. [2021-04-15 03:46:03,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 544 transitions. [2021-04-15 03:46:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:46:03,814 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:03,814 INFO L551 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:04,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 03:46:04,029 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:04,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:04,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2111435795, now seen corresponding path program 37 times [2021-04-15 03:46:04,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:04,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194776823] [2021-04-15 03:46:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194776823] [2021-04-15 03:46:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312085401] [2021-04-15 03:46:04,189 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 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 [2021-04-15 03:46:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-04-15 03:46:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 169 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:04,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:04,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-04-15 03:46:04,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244003389] [2021-04-15 03:46:04,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 03:46:04,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 03:46:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:46:04,614 INFO L87 Difference]: Start difference. First operand 264 states and 544 transitions. Second operand has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:04,920 INFO L93 Difference]: Finished difference Result 811 states and 1596 transitions. [2021-04-15 03:46:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:46:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:46:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:04,922 INFO L225 Difference]: With dead ends: 811 [2021-04-15 03:46:04,922 INFO L226 Difference]: Without dead ends: 718 [2021-04-15 03:46:04,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:46:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-04-15 03:46:04,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 545. [2021-04-15 03:46:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.150735294117647) internal successors, (1170), 544 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:04,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1170 transitions. [2021-04-15 03:46:04,928 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1170 transitions. Word has length 66 [2021-04-15 03:46:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:04,928 INFO L480 AbstractCegarLoop]: Abstraction has 545 states and 1170 transitions. [2021-04-15 03:46:04,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.2) internal successors, (126), 30 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:04,928 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1170 transitions. [2021-04-15 03:46:04,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-04-15 03:46:04,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:04,929 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:05,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 03:46:05,143 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1230925803, now seen corresponding path program 38 times [2021-04-15 03:46:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:05,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394675257] [2021-04-15 03:46:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394675257] [2021-04-15 03:46:05,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507129352] [2021-04-15 03:46:05,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:05,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:46:05,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 03:46:05,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:06,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:06,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-04-15 03:46:06,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930905389] [2021-04-15 03:46:06,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-04-15 03:46:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-04-15 03:46:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-04-15 03:46:06,545 INFO L87 Difference]: Start difference. First operand 545 states and 1170 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:17,041 INFO L93 Difference]: Finished difference Result 4071 states and 8017 transitions. [2021-04-15 03:46:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-04-15 03:46:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-04-15 03:46:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:17,045 INFO L225 Difference]: With dead ends: 4071 [2021-04-15 03:46:17,045 INFO L226 Difference]: Without dead ends: 3315 [2021-04-15 03:46:17,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41086 ImplicationChecksByTransitivity, 9071.9ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-04-15 03:46:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-04-15 03:46:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 334. [2021-04-15 03:46:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.057057057057057) internal successors, (685), 333 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 685 transitions. [2021-04-15 03:46:17,060 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 685 transitions. Word has length 68 [2021-04-15 03:46:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:17,060 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 685 transitions. [2021-04-15 03:46:17,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 685 transitions. [2021-04-15 03:46:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-04-15 03:46:17,061 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:17,061 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:17,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:17,275 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:17,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:17,276 INFO L82 PathProgramCache]: Analyzing trace with hash -868702579, now seen corresponding path program 39 times [2021-04-15 03:46:17,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:17,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487201491] [2021-04-15 03:46:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:17,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487201491] [2021-04-15 03:46:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436315007] [2021-04-15 03:46:17,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:17,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-04-15 03:46:17,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:17,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2021-04-15 03:46:17,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:18,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:18,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-04-15 03:46:18,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389973781] [2021-04-15 03:46:18,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-04-15 03:46:18,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-04-15 03:46:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-04-15 03:46:18,383 INFO L87 Difference]: Start difference. First operand 334 states and 685 transitions. Second operand has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:27,282 INFO L93 Difference]: Finished difference Result 2681 states and 5337 transitions. [2021-04-15 03:46:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-04-15 03:46:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-04-15 03:46:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:27,286 INFO L225 Difference]: With dead ends: 2681 [2021-04-15 03:46:27,286 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 03:46:27,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40452 ImplicationChecksByTransitivity, 8399.6ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-04-15 03:46:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 03:46:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 282. [2021-04-15 03:46:27,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.0711743772241995) internal successors, (582), 281 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 582 transitions. [2021-04-15 03:46:27,300 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 582 transitions. Word has length 68 [2021-04-15 03:46:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:27,300 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 582 transitions. [2021-04-15 03:46:27,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.625) internal successors, (126), 47 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 582 transitions. [2021-04-15 03:46:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-04-15 03:46:27,301 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:27,301 INFO L551 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:27,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:27,521 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash 880973737, now seen corresponding path program 40 times [2021-04-15 03:46:27,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:27,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894547169] [2021-04-15 03:46:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:27,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:27,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894547169] [2021-04-15 03:46:27,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071829489] [2021-04-15 03:46:27,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:27,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:46:27,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:27,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2021-04-15 03:46:27,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:28,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:28,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-04-15 03:46:28,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564861906] [2021-04-15 03:46:28,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-04-15 03:46:28,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-04-15 03:46:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:46:28,186 INFO L87 Difference]: Start difference. First operand 282 states and 582 transitions. Second operand has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:28,447 INFO L93 Difference]: Finished difference Result 870 states and 1713 transitions. [2021-04-15 03:46:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:46:28,448 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-04-15 03:46:28,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:28,449 INFO L225 Difference]: With dead ends: 870 [2021-04-15 03:46:28,449 INFO L226 Difference]: Without dead ends: 771 [2021-04-15 03:46:28,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:46:28,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-04-15 03:46:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 585. [2021-04-15 03:46:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1523972602739727) internal successors, (1257), 584 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1257 transitions. [2021-04-15 03:46:28,455 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1257 transitions. Word has length 70 [2021-04-15 03:46:28,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:28,455 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 1257 transitions. [2021-04-15 03:46:28,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 4.1875) internal successors, (134), 32 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1257 transitions. [2021-04-15 03:46:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-04-15 03:46:28,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:28,456 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:28,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 03:46:28,669 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash 550292647, now seen corresponding path program 41 times [2021-04-15 03:46:28,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:28,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214088956] [2021-04-15 03:46:28,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214088956] [2021-04-15 03:46:29,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762748009] [2021-04-15 03:46:29,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:29,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-04-15 03:46:29,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:29,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:46:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:30,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:30,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-04-15 03:46:30,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909283822] [2021-04-15 03:46:30,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-04-15 03:46:30,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-04-15 03:46:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 03:46:30,352 INFO L87 Difference]: Start difference. First operand 585 states and 1257 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:44,595 INFO L93 Difference]: Finished difference Result 4576 states and 9019 transitions. [2021-04-15 03:46:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-04-15 03:46:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-04-15 03:46:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:44,601 INFO L225 Difference]: With dead ends: 4576 [2021-04-15 03:46:44,601 INFO L226 Difference]: Without dead ends: 3718 [2021-04-15 03:46:44,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52776 ImplicationChecksByTransitivity, 12217.0ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-04-15 03:46:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3718 states. [2021-04-15 03:46:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3718 to 356. [2021-04-15 03:46:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.0591549295774647) internal successors, (731), 355 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 731 transitions. [2021-04-15 03:46:44,618 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 731 transitions. Word has length 72 [2021-04-15 03:46:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:44,619 INFO L480 AbstractCegarLoop]: Abstraction has 356 states and 731 transitions. [2021-04-15 03:46:44,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 731 transitions. [2021-04-15 03:46:44,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-04-15 03:46:44,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:44,619 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:44,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:44,820 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1768231027, now seen corresponding path program 42 times [2021-04-15 03:46:44,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:44,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743836615] [2021-04-15 03:46:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:45,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743836615] [2021-04-15 03:46:45,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373769755] [2021-04-15 03:46:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:45,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-04-15 03:46:45,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:46:45,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2021-04-15 03:46:45,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:46,329 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:46,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:46,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-04-15 03:46:46,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653468211] [2021-04-15 03:46:46,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-04-15 03:46:46,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:46,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-04-15 03:46:46,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-04-15 03:46:46,331 INFO L87 Difference]: Start difference. First operand 356 states and 731 transitions. Second operand has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:58,021 INFO L93 Difference]: Finished difference Result 3035 states and 6045 transitions. [2021-04-15 03:46:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-04-15 03:46:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-04-15 03:46:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:58,024 INFO L225 Difference]: With dead ends: 3035 [2021-04-15 03:46:58,024 INFO L226 Difference]: Without dead ends: 3031 [2021-04-15 03:46:58,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51852 ImplicationChecksByTransitivity, 11039.7ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-04-15 03:46:58,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3031 states. [2021-04-15 03:46:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3031 to 300. [2021-04-15 03:46:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.0735785953177257) internal successors, (620), 299 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 620 transitions. [2021-04-15 03:46:58,040 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 620 transitions. Word has length 72 [2021-04-15 03:46:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:58,040 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 620 transitions. [2021-04-15 03:46:58,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.627450980392157) internal successors, (134), 50 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 620 transitions. [2021-04-15 03:46:58,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-04-15 03:46:58,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:58,041 INFO L551 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:58,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:58,241 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -372460187, now seen corresponding path program 43 times [2021-04-15 03:46:58,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:58,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581575945] [2021-04-15 03:46:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:58,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581575945] [2021-04-15 03:46:58,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980267116] [2021-04-15 03:46:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:46:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:46:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 34 conjunts are in the unsatisfiable core [2021-04-15 03:46:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:46:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 225 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:46:59,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:46:59,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2021-04-15 03:46:59,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979993493] [2021-04-15 03:46:59,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-04-15 03:46:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:46:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-04-15 03:46:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:46:59,118 INFO L87 Difference]: Start difference. First operand 300 states and 620 transitions. Second operand has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:59,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:46:59,500 INFO L93 Difference]: Finished difference Result 929 states and 1830 transitions. [2021-04-15 03:46:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:46:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-04-15 03:46:59,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:46:59,502 INFO L225 Difference]: With dead ends: 929 [2021-04-15 03:46:59,502 INFO L226 Difference]: Without dead ends: 824 [2021-04-15 03:46:59,502 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 03:46:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-04-15 03:46:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 625. [2021-04-15 03:46:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.1538461538461537) internal successors, (1344), 624 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1344 transitions. [2021-04-15 03:46:59,508 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1344 transitions. Word has length 74 [2021-04-15 03:46:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:46:59,509 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1344 transitions. [2021-04-15 03:46:59,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 4.176470588235294) internal successors, (142), 34 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:46:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1344 transitions. [2021-04-15 03:46:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:46:59,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:46:59,509 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:46:59,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 03:46:59,721 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:46:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:46:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1948763293, now seen corresponding path program 44 times [2021-04-15 03:46:59,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:46:59,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205324938] [2021-04-15 03:46:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:46:59,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:00,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205324938] [2021-04-15 03:47:00,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446602094] [2021-04-15 03:47:00,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:00,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:47:00,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:00,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 03:47:00,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:01,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:01,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-04-15 03:47:01,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377836755] [2021-04-15 03:47:01,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-04-15 03:47:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-04-15 03:47:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-04-15 03:47:01,722 INFO L87 Difference]: Start difference. First operand 625 states and 1344 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:20,078 INFO L93 Difference]: Finished difference Result 5109 states and 10077 transitions. [2021-04-15 03:47:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-04-15 03:47:20,079 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:47:20,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:20,082 INFO L225 Difference]: With dead ends: 5109 [2021-04-15 03:47:20,083 INFO L226 Difference]: Without dead ends: 4143 [2021-04-15 03:47:20,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66817 ImplicationChecksByTransitivity, 15682.8ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-04-15 03:47:20,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-04-15 03:47:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 378. [2021-04-15 03:47:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.061007957559682) internal successors, (777), 377 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 777 transitions. [2021-04-15 03:47:20,102 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 777 transitions. Word has length 76 [2021-04-15 03:47:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:20,102 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 777 transitions. [2021-04-15 03:47:20,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 777 transitions. [2021-04-15 03:47:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:47:20,103 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:20,103 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:20,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 03:47:20,303 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 122702221, now seen corresponding path program 45 times [2021-04-15 03:47:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:20,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670526632] [2021-04-15 03:47:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:20,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670526632] [2021-04-15 03:47:20,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307214361] [2021-04-15 03:47:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:20,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-04-15 03:47:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:20,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 35 conjunts are in the unsatisfiable core [2021-04-15 03:47:20,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:22,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:22,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-04-15 03:47:22,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080088748] [2021-04-15 03:47:22,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-04-15 03:47:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-04-15 03:47:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-04-15 03:47:22,106 INFO L87 Difference]: Start difference. First operand 378 states and 777 transitions. Second operand has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:38,507 INFO L93 Difference]: Finished difference Result 3411 states and 6797 transitions. [2021-04-15 03:47:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-04-15 03:47:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:47:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:38,511 INFO L225 Difference]: With dead ends: 3411 [2021-04-15 03:47:38,511 INFO L226 Difference]: Without dead ends: 3407 [2021-04-15 03:47:38,515 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65510 ImplicationChecksByTransitivity, 15218.1ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-04-15 03:47:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-04-15 03:47:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 318. [2021-04-15 03:47:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.0757097791798107) internal successors, (658), 317 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 658 transitions. [2021-04-15 03:47:38,526 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 658 transitions. Word has length 76 [2021-04-15 03:47:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:38,526 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 658 transitions. [2021-04-15 03:47:38,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6296296296296298) internal successors, (142), 53 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 658 transitions. [2021-04-15 03:47:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-04-15 03:47:38,527 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:38,527 INFO L551 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:38,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-04-15 03:47:38,738 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:38,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1078500063, now seen corresponding path program 46 times [2021-04-15 03:47:38,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:38,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210805314] [2021-04-15 03:47:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210805314] [2021-04-15 03:47:39,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868592884] [2021-04-15 03:47:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:39,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:47:39,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:39,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2021-04-15 03:47:39,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 256 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:39,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:39,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2021-04-15 03:47:39,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543154114] [2021-04-15 03:47:39,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-04-15 03:47:39,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-04-15 03:47:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:47:39,828 INFO L87 Difference]: Start difference. First operand 318 states and 658 transitions. Second operand has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:47:40,380 INFO L93 Difference]: Finished difference Result 988 states and 1947 transitions. [2021-04-15 03:47:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:47:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-04-15 03:47:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:47:40,381 INFO L225 Difference]: With dead ends: 988 [2021-04-15 03:47:40,381 INFO L226 Difference]: Without dead ends: 877 [2021-04-15 03:47:40,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 776.5ms TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:47:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-04-15 03:47:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 665. [2021-04-15 03:47:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 2.1551204819277108) internal successors, (1431), 664 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 1431 transitions. [2021-04-15 03:47:40,388 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 1431 transitions. Word has length 78 [2021-04-15 03:47:40,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:47:40,388 INFO L480 AbstractCegarLoop]: Abstraction has 665 states and 1431 transitions. [2021-04-15 03:47:40,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:47:40,388 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 1431 transitions. [2021-04-15 03:47:40,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-04-15 03:47:40,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:47:40,389 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:47:40,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:40,605 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:47:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:47:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash -999048161, now seen corresponding path program 47 times [2021-04-15 03:47:40,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:47:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862366682] [2021-04-15 03:47:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:47:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:47:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:41,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862366682] [2021-04-15 03:47:41,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366671024] [2021-04-15 03:47:41,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:47:41,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-04-15 03:47:41,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:47:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 03:47:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:47:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:47:43,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:47:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-04-15 03:47:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877586306] [2021-04-15 03:47:43,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-04-15 03:47:43,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:47:43,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-04-15 03:47:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-04-15 03:47:43,193 INFO L87 Difference]: Start difference. First operand 665 states and 1431 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:08,297 INFO L93 Difference]: Finished difference Result 5670 states and 11191 transitions. [2021-04-15 03:48:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-04-15 03:48:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-04-15 03:48:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:08,302 INFO L225 Difference]: With dead ends: 5670 [2021-04-15 03:48:08,302 INFO L226 Difference]: Without dead ends: 4590 [2021-04-15 03:48:08,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83508 ImplicationChecksByTransitivity, 21502.2ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-04-15 03:48:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4590 states. [2021-04-15 03:48:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4590 to 400. [2021-04-15 03:48:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.06265664160401) internal successors, (823), 399 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 823 transitions. [2021-04-15 03:48:08,324 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 823 transitions. Word has length 80 [2021-04-15 03:48:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:08,324 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 823 transitions. [2021-04-15 03:48:08,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 823 transitions. [2021-04-15 03:48:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-04-15 03:48:08,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:08,324 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:08,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 03:48:08,525 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:08,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2100824947, now seen corresponding path program 48 times [2021-04-15 03:48:08,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:08,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345833522] [2021-04-15 03:48:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:08,972 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:08,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345833522] [2021-04-15 03:48:08,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317374576] [2021-04-15 03:48:08,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:09,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-04-15 03:48:09,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 03:48:09,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:10,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:10,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-04-15 03:48:10,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178657730] [2021-04-15 03:48:10,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-04-15 03:48:10,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:10,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-04-15 03:48:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 03:48:10,949 INFO L87 Difference]: Start difference. First operand 400 states and 823 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:34,492 INFO L93 Difference]: Finished difference Result 3809 states and 7593 transitions. [2021-04-15 03:48:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-04-15 03:48:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-04-15 03:48:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:34,497 INFO L225 Difference]: With dead ends: 3809 [2021-04-15 03:48:34,497 INFO L226 Difference]: Without dead ends: 3805 [2021-04-15 03:48:34,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81707 ImplicationChecksByTransitivity, 22329.8ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-04-15 03:48:34,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-04-15 03:48:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 336. [2021-04-15 03:48:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.0776119402985076) internal successors, (696), 335 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 696 transitions. [2021-04-15 03:48:34,516 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 696 transitions. Word has length 80 [2021-04-15 03:48:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:34,517 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 696 transitions. [2021-04-15 03:48:34,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 696 transitions. [2021-04-15 03:48:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-04-15 03:48:34,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:34,517 INFO L551 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:34,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:34,718 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1064675037, now seen corresponding path program 49 times [2021-04-15 03:48:34,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:34,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4349276] [2021-04-15 03:48:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:35,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4349276] [2021-04-15 03:48:35,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521763796] [2021-04-15 03:48:35,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2021-04-15 03:48:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 289 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:36,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:36,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-04-15 03:48:36,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279771689] [2021-04-15 03:48:36,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-04-15 03:48:36,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:36,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-04-15 03:48:36,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:48:36,388 INFO L87 Difference]: Start difference. First operand 336 states and 696 transitions. Second operand has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:48:37,218 INFO L93 Difference]: Finished difference Result 1047 states and 2064 transitions. [2021-04-15 03:48:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:48:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-04-15 03:48:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:48:37,221 INFO L225 Difference]: With dead ends: 1047 [2021-04-15 03:48:37,221 INFO L226 Difference]: Without dead ends: 930 [2021-04-15 03:48:37,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1209.0ms TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:48:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-04-15 03:48:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 705. [2021-04-15 03:48:37,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.15625) internal successors, (1518), 704 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:37,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1518 transitions. [2021-04-15 03:48:37,229 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1518 transitions. Word has length 82 [2021-04-15 03:48:37,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:48:37,229 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 1518 transitions. [2021-04-15 03:48:37,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:48:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1518 transitions. [2021-04-15 03:48:37,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-15 03:48:37,230 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:48:37,230 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:48:37,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:37,441 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:48:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:48:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1343377115, now seen corresponding path program 50 times [2021-04-15 03:48:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:48:37,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915572310] [2021-04-15 03:48:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:48:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:48:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:38,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915572310] [2021-04-15 03:48:38,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513676766] [2021-04-15 03:48:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:48:38,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:48:38,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:48:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 03:48:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:48:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:48:41,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:48:41,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-04-15 03:48:41,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019806912] [2021-04-15 03:48:41,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-04-15 03:48:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:48:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-04-15 03:48:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 03:48:41,416 INFO L87 Difference]: Start difference. First operand 705 states and 1518 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:49:19,977 INFO L93 Difference]: Finished difference Result 6259 states and 12361 transitions. [2021-04-15 03:49:19,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-04-15 03:49:19,979 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-15 03:49:19,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:49:19,983 INFO L225 Difference]: With dead ends: 6259 [2021-04-15 03:49:19,983 INFO L226 Difference]: Without dead ends: 5059 [2021-04-15 03:49:19,992 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103165 ImplicationChecksByTransitivity, 33409.1ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-04-15 03:49:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-04-15 03:49:20,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 422. [2021-04-15 03:49:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0641330166270784) internal successors, (869), 421 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 869 transitions. [2021-04-15 03:49:20,008 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 869 transitions. Word has length 84 [2021-04-15 03:49:20,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:49:20,009 INFO L480 AbstractCegarLoop]: Abstraction has 422 states and 869 transitions. [2021-04-15 03:49:20,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:49:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 869 transitions. [2021-04-15 03:49:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-04-15 03:49:20,009 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:49:20,009 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:49:20,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-04-15 03:49:20,210 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:49:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:49:20,210 INFO L82 PathProgramCache]: Analyzing trace with hash 182530189, now seen corresponding path program 51 times [2021-04-15 03:49:20,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:49:20,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422419965] [2021-04-15 03:49:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:49:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:49:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422419965] [2021-04-15 03:49:20,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750660310] [2021-04-15 03:49:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:49:20,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-04-15 03:49:20,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:49:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 39 conjunts are in the unsatisfiable core [2021-04-15 03:49:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:49:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:49:24,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:49:24,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-04-15 03:49:24,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078686855] [2021-04-15 03:49:24,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-04-15 03:49:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:49:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-04-15 03:49:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-04-15 03:49:24,216 INFO L87 Difference]: Start difference. First operand 422 states and 869 transitions. Second operand has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:50:03,136 INFO L93 Difference]: Finished difference Result 4229 states and 8433 transitions. [2021-04-15 03:50:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-04-15 03:50:03,139 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-04-15 03:50:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:50:03,142 INFO L225 Difference]: With dead ends: 4229 [2021-04-15 03:50:03,142 INFO L226 Difference]: Without dead ends: 4225 [2021-04-15 03:50:03,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100740 ImplicationChecksByTransitivity, 36408.1ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-04-15 03:50:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-04-15 03:50:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 354. [2021-04-15 03:50:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.0793201133144477) internal successors, (734), 353 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 734 transitions. [2021-04-15 03:50:03,163 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 734 transitions. Word has length 84 [2021-04-15 03:50:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:03,163 INFO L480 AbstractCegarLoop]: Abstraction has 354 states and 734 transitions. [2021-04-15 03:50:03,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6333333333333333) internal successors, (158), 59 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 734 transitions. [2021-04-15 03:50:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:50:03,163 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:03,164 INFO L551 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:50:03,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:03,364 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:03,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1572502169, now seen corresponding path program 52 times [2021-04-15 03:50:03,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:03,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584744002] [2021-04-15 03:50:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:04,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584744002] [2021-04-15 03:50:04,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991753374] [2021-04-15 03:50:04,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:04,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:50:04,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:50:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 40 conjunts are in the unsatisfiable core [2021-04-15 03:50:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 324 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:06,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:06,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2021-04-15 03:50:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644780457] [2021-04-15 03:50:06,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-04-15 03:50:06,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-04-15 03:50:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:50:06,371 INFO L87 Difference]: Start difference. First operand 354 states and 734 transitions. Second operand has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:50:07,958 INFO L93 Difference]: Finished difference Result 1106 states and 2181 transitions. [2021-04-15 03:50:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:50:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:50:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:50:07,961 INFO L225 Difference]: With dead ends: 1106 [2021-04-15 03:50:07,961 INFO L226 Difference]: Without dead ends: 983 [2021-04-15 03:50:07,962 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 2136.7ms TimeCoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:50:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-04-15 03:50:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 745. [2021-04-15 03:50:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.157258064516129) internal successors, (1605), 744 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1605 transitions. [2021-04-15 03:50:07,968 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1605 transitions. Word has length 86 [2021-04-15 03:50:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:50:07,969 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 1605 transitions. [2021-04-15 03:50:07,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 4.15) internal successors, (166), 40 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:50:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1605 transitions. [2021-04-15 03:50:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-04-15 03:50:07,970 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:50:07,970 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:50:08,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 03:50:08,170 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:50:08,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:50:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash -5835881, now seen corresponding path program 53 times [2021-04-15 03:50:08,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:50:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680993077] [2021-04-15 03:50:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:50:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:50:10,049 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:10,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680993077] [2021-04-15 03:50:10,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169977556] [2021-04-15 03:50:10,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:50:10,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-04-15 03:50:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:50:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 03:50:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:50:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:50:14,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:50:14,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-04-15 03:50:14,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546172908] [2021-04-15 03:50:14,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-04-15 03:50:14,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:50:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-04-15 03:50:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-04-15 03:50:14,837 INFO L87 Difference]: Start difference. First operand 745 states and 1605 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:51:17,351 INFO L93 Difference]: Finished difference Result 6876 states and 13587 transitions. [2021-04-15 03:51:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-04-15 03:51:17,354 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-04-15 03:51:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:51:17,360 INFO L225 Difference]: With dead ends: 6876 [2021-04-15 03:51:17,360 INFO L226 Difference]: Without dead ends: 5550 [2021-04-15 03:51:17,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126123 ImplicationChecksByTransitivity, 57466.5ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-04-15 03:51:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5550 states. [2021-04-15 03:51:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5550 to 444. [2021-04-15 03:51:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-04-15 03:51:17,391 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 88 [2021-04-15 03:51:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:51:17,391 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-04-15 03:51:17,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:51:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-04-15 03:51:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-04-15 03:51:17,392 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:51:17,392 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:51:17,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-04-15 03:51:17,605 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:51:17,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:51:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2098512499, now seen corresponding path program 54 times [2021-04-15 03:51:17,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:51:17,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564357534] [2021-04-15 03:51:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:51:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:51:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564357534] [2021-04-15 03:51:18,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656201327] [2021-04-15 03:51:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:51:18,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-04-15 03:51:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:51:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-04-15 03:51:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:51:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:51:24,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:51:24,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-04-15 03:51:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253565709] [2021-04-15 03:51:24,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-04-15 03:51:24,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:51:24,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-04-15 03:51:24,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-04-15 03:51:24,267 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:25,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:52:25,713 INFO L93 Difference]: Finished difference Result 4671 states and 9317 transitions. [2021-04-15 03:52:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-04-15 03:52:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-04-15 03:52:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:52:25,721 INFO L225 Difference]: With dead ends: 4671 [2021-04-15 03:52:25,721 INFO L226 Difference]: Without dead ends: 4667 [2021-04-15 03:52:25,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122923 ImplicationChecksByTransitivity, 57801.5ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-04-15 03:52:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-04-15 03:52:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 372. [2021-04-15 03:52:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.0808625336927222) internal successors, (772), 371 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:25,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 772 transitions. [2021-04-15 03:52:25,782 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 772 transitions. Word has length 88 [2021-04-15 03:52:25,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:52:25,782 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 772 transitions. [2021-04-15 03:52:25,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:25,782 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 772 transitions. [2021-04-15 03:52:25,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-04-15 03:52:25,783 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:52:25,783 INFO L551 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:52:25,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:52:25,984 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:52:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:52:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash 2058936405, now seen corresponding path program 55 times [2021-04-15 03:52:25,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:52:25,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171663546] [2021-04-15 03:52:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:52:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:52:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171663546] [2021-04-15 03:52:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956460645] [2021-04-15 03:52:27,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:52:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:52:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2021-04-15 03:52:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:52:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 361 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:30,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:52:30,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2021-04-15 03:52:30,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019547670] [2021-04-15 03:52:30,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-04-15 03:52:30,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:52:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-04-15 03:52:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:52:30,358 INFO L87 Difference]: Start difference. First operand 372 states and 772 transitions. Second operand has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:52:32,495 INFO L93 Difference]: Finished difference Result 1165 states and 2298 transitions. [2021-04-15 03:52:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:52:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-04-15 03:52:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:52:32,500 INFO L225 Difference]: With dead ends: 1165 [2021-04-15 03:52:32,500 INFO L226 Difference]: Without dead ends: 1036 [2021-04-15 03:52:32,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3062.4ms TimeCoverageRelationStatistics Valid=481, Invalid=1241, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 03:52:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-04-15 03:52:32,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 785. [2021-04-15 03:52:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.1581632653061225) internal successors, (1692), 784 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1692 transitions. [2021-04-15 03:52:32,508 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1692 transitions. Word has length 90 [2021-04-15 03:52:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:52:32,508 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1692 transitions. [2021-04-15 03:52:32,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 42 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:52:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1692 transitions. [2021-04-15 03:52:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-04-15 03:52:32,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:52:32,509 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:52:32,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 03:52:32,710 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:52:32,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:52:32,710 INFO L82 PathProgramCache]: Analyzing trace with hash -274421165, now seen corresponding path program 56 times [2021-04-15 03:52:32,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:52:32,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107379177] [2021-04-15 03:52:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:52:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:52:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:35,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107379177] [2021-04-15 03:52:35,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66244404] [2021-04-15 03:52:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:52:35,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:52:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:52:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 03:52:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:52:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:52:43,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:52:43,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-04-15 03:52:43,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177127528] [2021-04-15 03:52:43,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-04-15 03:52:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:52:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-04-15 03:52:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-04-15 03:52:43,314 INFO L87 Difference]: Start difference. First operand 785 states and 1692 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:22,027 INFO L93 Difference]: Finished difference Result 7521 states and 14869 transitions. [2021-04-15 03:54:22,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-04-15 03:54:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-04-15 03:54:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:22,039 INFO L225 Difference]: With dead ends: 7521 [2021-04-15 03:54:22,040 INFO L226 Difference]: Without dead ends: 6063 [2021-04-15 03:54:22,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152734 ImplicationChecksByTransitivity, 89650.2ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-04-15 03:54:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-04-15 03:54:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 466. [2021-04-15 03:54:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.066666666666667) internal successors, (961), 465 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 961 transitions. [2021-04-15 03:54:22,081 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 961 transitions. Word has length 92 [2021-04-15 03:54:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:22,081 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 961 transitions. [2021-04-15 03:54:22,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 961 transitions. [2021-04-15 03:54:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-04-15 03:54:22,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:22,082 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:22,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:22,297 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:22,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash -207266931, now seen corresponding path program 57 times [2021-04-15 03:54:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402780508] [2021-04-15 03:54:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402780508] [2021-04-15 03:54:23,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070126811] [2021-04-15 03:54:23,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:24,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-04-15 03:54:24,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:54:24,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 43 conjunts are in the unsatisfiable core [2021-04-15 03:54:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:32,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:32,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-04-15 03:54:32,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861895652] [2021-04-15 03:54:32,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-04-15 03:54:32,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-04-15 03:54:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-04-15 03:54:32,293 INFO L87 Difference]: Start difference. First operand 466 states and 961 transitions. Second operand has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:23,577 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-04-15 03:55:53,814 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2021-04-15 03:56:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:10,688 INFO L93 Difference]: Finished difference Result 5135 states and 10245 transitions. [2021-04-15 03:56:10,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-04-15 03:56:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-04-15 03:56:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:10,697 INFO L225 Difference]: With dead ends: 5135 [2021-04-15 03:56:10,697 INFO L226 Difference]: Without dead ends: 5131 [2021-04-15 03:56:10,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148586 ImplicationChecksByTransitivity, 93716.6ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-04-15 03:56:10,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-04-15 03:56:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 390. [2021-04-15 03:56:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.082262210796915) internal successors, (810), 389 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 810 transitions. [2021-04-15 03:56:10,728 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 810 transitions. Word has length 92 [2021-04-15 03:56:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:10,728 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 810 transitions. [2021-04-15 03:56:10,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6363636363636362) internal successors, (174), 65 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 810 transitions. [2021-04-15 03:56:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-04-15 03:56:10,729 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:10,729 INFO L551 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:10,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 03:56:10,944 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1646516241, now seen corresponding path program 58 times [2021-04-15 03:56:10,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:10,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355818928] [2021-04-15 03:56:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355818928] [2021-04-15 03:56:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443753465] [2021-04-15 03:56:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:12,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2021-04-15 03:56:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 400 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:17,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:17,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 44 [2021-04-15 03:56:17,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026277815] [2021-04-15 03:56:17,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-04-15 03:56:17,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:17,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-04-15 03:56:17,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:56:17,085 INFO L87 Difference]: Start difference. First operand 390 states and 810 transitions. Second operand has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:20,017 INFO L93 Difference]: Finished difference Result 1224 states and 2415 transitions. [2021-04-15 03:56:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:56:20,021 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-04-15 03:56:20,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:20,023 INFO L225 Difference]: With dead ends: 1224 [2021-04-15 03:56:20,023 INFO L226 Difference]: Without dead ends: 1089 [2021-04-15 03:56:20,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4374.5ms TimeCoverageRelationStatistics Valid=526, Invalid=1366, Unknown=0, NotChecked=0, Total=1892 [2021-04-15 03:56:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-04-15 03:56:20,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 825. [2021-04-15 03:56:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.158980582524272) internal successors, (1779), 824 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1779 transitions. [2021-04-15 03:56:20,031 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1779 transitions. Word has length 94 [2021-04-15 03:56:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:20,031 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 1779 transitions. [2021-04-15 03:56:20,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.136363636363637) internal successors, (182), 44 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1779 transitions. [2021-04-15 03:56:20,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:56:20,032 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:20,032 INFO L551 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:20,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:20,248 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:20,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2013367537, now seen corresponding path program 59 times [2021-04-15 03:56:20,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:20,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283600711] [2021-04-15 03:56:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:24,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283600711] [2021-04-15 03:56:24,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478698166] [2021-04-15 03:56:24,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:24,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-04-15 03:56:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 45 conjunts are in the unsatisfiable core [2021-04-15 03:56:24,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:34,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:34,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-04-15 03:56:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47729142] [2021-04-15 03:56:34,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-04-15 03:56:34,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:34,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-04-15 03:56:34,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-04-15 03:56:34,835 INFO L87 Difference]: Start difference. First operand 825 states and 1779 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-04-15 03:58:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2021-04-15 03:58:20,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-04-15 03:58:20,858 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 03:58:20,861 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 03:58:20,861 INFO L202 PluginConnector]: Adding new model figure1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 03:58:20 BasicIcfg [2021-04-15 03:58:20,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 03:58:20,862 INFO L168 Benchmark]: Toolchain (without parser) took 831831.84 ms. Allocated memory was 362.8 MB in the beginning and 629.1 MB in the end (delta: 266.3 MB). Free memory was 343.2 MB in the beginning and 242.5 MB in the end (delta: 100.7 MB). Peak memory consumption was 370.1 MB. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 362.8 MB. Free memory was 344.3 MB in the beginning and 344.2 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.84 ms. Allocated memory is still 362.8 MB. Free memory was 343.1 MB in the beginning and 341.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 INFO L168 Benchmark]: Boogie Preprocessor took 10.85 ms. Allocated memory is still 362.8 MB. Free memory was 341.7 MB in the beginning and 340.8 MB in the end (delta: 929.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 INFO L168 Benchmark]: RCFGBuilder took 154.82 ms. Allocated memory is still 362.8 MB. Free memory was 340.7 MB in the beginning and 329.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 INFO L168 Benchmark]: TraceAbstraction took 831643.06 ms. Allocated memory was 362.8 MB in the beginning and 629.1 MB in the end (delta: 266.3 MB). Free memory was 329.0 MB in the beginning and 242.5 MB in the end (delta: 86.5 MB). Peak memory consumption was 355.4 MB. Max. memory is 16.0 GB. [2021-04-15 03:58:20,862 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 0.09 ms. Allocated memory is still 362.8 MB. Free memory was 344.3 MB in the beginning and 344.2 MB in the end (delta: 76.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.84 ms. Allocated memory is still 362.8 MB. Free memory was 343.1 MB in the beginning and 341.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.85 ms. Allocated memory is still 362.8 MB. Free memory was 341.7 MB in the beginning and 340.8 MB in the end (delta: 929.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 154.82 ms. Allocated memory is still 362.8 MB. Free memory was 340.7 MB in the beginning and 329.4 MB in the end (delta: 11.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 831643.06 ms. Allocated memory was 362.8 MB in the beginning and 629.1 MB in the end (delta: 266.3 MB). Free memory was 329.0 MB in the beginning and 242.5 MB in the end (delta: 86.5 MB). Peak memory consumption was 355.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 50). Cancelled while BasicCegarLoop was constructing difference of abstraction (825states) and FLOYD_HOARE automaton (currently 457 states, 90 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 543 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 831581.7ms, OverallIterations: 62, TraceHistogramMax: 21, EmptinessCheckTime: 43.3ms, AutomataDifference: 711817.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4582 SDtfs, 35515 SDslu, 72101 SDs, 0 SdLazy, 81046 SolverSat, 4357 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44539.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12700 GetRequests, 2593 SyntacticMatches, 40 SemanticMatches, 10066 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596533 ImplicationChecksByTransitivity, 659840.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=825occurred in iteration=61, InterpolantAutomatonStates: 7869, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 521.5ms AutomataMinimizationTime, 61 MinimizatonAttempts, 81637 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 280.3ms SsaConstructionTime, 1274.3ms SatisfiabilityAnalysisTime, 103769.5ms InterpolantComputationTime, 6750 NumberOfCodeBlocks, 6750 NumberOfCodeBlocksAsserted, 498 NumberOfCheckSat, 6628 ConstructedInterpolants, 0 QuantifiedInterpolants, 43363 SizeOfPredicates, 180 NumberOfNonLiveVariables, 8590 ConjunctsInSsa, 1500 ConjunctsInUnsatCore, 122 InterpolantComputations, 2 PerfectInterpolantSequences, 13969/34521 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown