/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:22:37,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:22:37,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:22:37,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:22:37,931 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-Separate.epf [2021-06-05 15:22:37,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:22:37,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:22:37,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:22:37,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:22:37,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:22:37,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:22:37,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:22:37,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:22:37,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:22:37,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:22:37,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:22:38,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:22:38,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:22:38,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:22:38,213 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:22:38,214 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:22:38,214 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-06-05 15:22:38,215 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-06-05 15:22:38,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:22:38,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:22:38,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:22:38,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:22:38,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:22:38,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:22:38,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:22:38,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:22:38,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:22:38,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... [2021-06-05 15:22:38,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:22:38,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:22:38,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:22:38,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:22:38,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:22:38,351 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:22:38,351 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:22:38,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:22:38,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:22:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:22:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:22:38,352 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:22:38,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:22:38,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:22:38,353 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:22:38,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:22:38,544 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:22:38,546 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:22:38 BoogieIcfgContainer [2021-06-05 15:22:38,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:22:38,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:22:38,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:22:38,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:22:38,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:22:38" (1/2) ... [2021-06-05 15:22:38,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae3fadf and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:22:38, skipping insertion in model container [2021-06-05 15:22:38,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:22:38" (2/2) ... [2021-06-05 15:22:38,551 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-06-05 15:22:38,555 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:22:38,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:22:38,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:22:38,555 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:22:38,596 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 15:22:38,610 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 15:22:38,622 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:22:38,623 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:22:38,623 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:22:38,623 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:22:38,623 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:22:38,623 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:22:38,623 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:22:38,623 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:22:38,635 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-06-05 15:22:38,644 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:38,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:22:38,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:38,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:38,658 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:38,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-06-05 15:22:38,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:38,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423842516] [2021-06-05 15:22:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:38,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:38,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423842516] [2021-06-05 15:22:38,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423842516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:38,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:22:38,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:22:38,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400069074] [2021-06-05 15:22:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:22:38,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:38,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:22:38,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:38,800 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:38,822 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-06-05 15:22:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:22:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:22:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:38,832 INFO L225 Difference]: With dead ends: 58 [2021-06-05 15:22:38,832 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 15:22:38,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:22:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 15:22:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-06-05 15:22:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:38,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-06-05 15:22:38,863 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-06-05 15:22:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:38,863 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-06-05 15:22:38,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-06-05 15:22:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:22:38,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:38,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:38,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:22:38,865 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:38,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:38,869 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-06-05 15:22:38,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:38,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298290557] [2021-06-05 15:22:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:38,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298290557] [2021-06-05 15:22:38,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298290557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:38,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868850118] [2021-06-05 15:22:38,971 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) [2021-06-05 15:22:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:22:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:39,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868850118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:39,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:39,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 15:22:39,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493530577] [2021-06-05 15:22:39,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:22:39,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:39,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:22:39,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:39,177 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:39,327 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-06-05 15:22:39,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:22:39,328 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 15:22:39,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:39,329 INFO L225 Difference]: With dead ends: 64 [2021-06-05 15:22:39,329 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 15:22:39,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:22:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 15:22:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-06-05 15:22:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-06-05 15:22:39,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-06-05 15:22:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:39,334 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-06-05 15:22:39,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-06-05 15:22:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:22:39,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:39,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:39,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:22:39,553 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-06-05 15:22:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210715036] [2021-06-05 15:22:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:39,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:39,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210715036] [2021-06-05 15:22:39,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210715036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:22:39,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:22:39,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:22:39,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606905994] [2021-06-05 15:22:39,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:22:39,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:39,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:22:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:22:39,587 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:39,631 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-06-05 15:22:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:22:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 15:22:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:39,632 INFO L225 Difference]: With dead ends: 51 [2021-06-05 15:22:39,632 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 15:22:39,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:39,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 15:22:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-06-05 15:22:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-06-05 15:22:39,646 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-06-05 15:22:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:39,646 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-06-05 15:22:39,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-06-05 15:22:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:22:39,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:39,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:39,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:22:39,648 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-06-05 15:22:39,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:39,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923360862] [2021-06-05 15:22:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:39,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923360862] [2021-06-05 15:22:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923360862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050269817] [2021-06-05 15:22:39,706 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 [2021-06-05 15:22:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:22:39,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050269817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:39,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:39,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 15:22:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041892663] [2021-06-05 15:22:39,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:22:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:22:39,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:22:39,839 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:39,858 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-06-05 15:22:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:22:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:22:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:39,859 INFO L225 Difference]: With dead ends: 97 [2021-06-05 15:22:39,859 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 15:22:39,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:22:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 15:22:39,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-05 15:22:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.896551724137931) internal successors, (110), 58 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) [2021-06-05 15:22:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-06-05 15:22:39,863 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-06-05 15:22:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:39,863 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-06-05 15:22:39,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-06-05 15:22:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:22:39,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:39,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:40,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:40,077 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-06-05 15:22:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:40,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270503228] [2021-06-05 15:22:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:40,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270503228] [2021-06-05 15:22:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270503228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551250687] [2021-06-05 15:22:40,139 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 [2021-06-05 15:22:40,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:40,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:22:40,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:40,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551250687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:40,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:40,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 15:22:40,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155107658] [2021-06-05 15:22:40,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:22:40,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:22:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:22:40,286 INFO L87 Difference]: Start difference. First operand 59 states and 110 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:40,518 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-06-05 15:22:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:22:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:22:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:40,519 INFO L225 Difference]: With dead ends: 174 [2021-06-05 15:22:40,519 INFO L226 Difference]: Without dead ends: 168 [2021-06-05 15:22:40,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:22:40,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-05 15:22:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-06-05 15:22:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 67 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) [2021-06-05 15:22:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-06-05 15:22:40,524 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-06-05 15:22:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:40,525 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-06-05 15:22:40,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-06-05 15:22:40,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:22:40,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:40,525 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:40,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:40,745 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:40,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-06-05 15:22:40,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:40,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276376881] [2021-06-05 15:22:40,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:40,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:40,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:40,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276376881] [2021-06-05 15:22:40,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276376881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:40,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884346092] [2021-06-05 15:22:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:40,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:22:40,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:40,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:22:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:40,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884346092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:40,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:40,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:22:40,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269572009] [2021-06-05 15:22:40,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:22:40,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:22:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:22:40,941 INFO L87 Difference]: Start difference. First operand 68 states and 130 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:41,170 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-06-05 15:22:41,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:22:41,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:22:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:41,172 INFO L225 Difference]: With dead ends: 146 [2021-06-05 15:22:41,172 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 15:22:41,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:22:41,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 15:22:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-06-05 15:22:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 66 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-06-05 15:22:41,182 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-06-05 15:22:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:41,182 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-06-05 15:22:41,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-06-05 15:22:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:22:41,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:41,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:41,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:41,400 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-06-05 15:22:41,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:41,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288406142] [2021-06-05 15:22:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:41,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:41,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288406142] [2021-06-05 15:22:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288406142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:41,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357350891] [2021-06-05 15:22:41,446 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 [2021-06-05 15:22:41,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:41,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:41,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:22:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357350891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:41,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:41,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 15:22:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236610234] [2021-06-05 15:22:41,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:22:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:22:41,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:22:41,514 INFO L87 Difference]: Start difference. First operand 67 states and 127 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:41,532 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-06-05 15:22:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:22:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:22:41,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:41,533 INFO L225 Difference]: With dead ends: 163 [2021-06-05 15:22:41,533 INFO L226 Difference]: Without dead ends: 136 [2021-06-05 15:22:41,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:22:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-06-05 15:22:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-06-05 15:22:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-06-05 15:22:41,537 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-06-05 15:22:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:41,537 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-06-05 15:22:41,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:41,537 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-06-05 15:22:41,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:22:41,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:41,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:41,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 15:22:41,757 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-06-05 15:22:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635746028] [2021-06-05 15:22:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:41,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:41,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635746028] [2021-06-05 15:22:41,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635746028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:41,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665343004] [2021-06-05 15:22:41,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:41,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:22:41,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:41,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:22:41,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665343004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:41,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:41,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:22:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497091686] [2021-06-05 15:22:41,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:22:41,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:22:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:22:41,990 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:42,462 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-06-05 15:22:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:22:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:22:42,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:42,464 INFO L225 Difference]: With dead ends: 365 [2021-06-05 15:22:42,464 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 15:22:42,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:22:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 15:22:42,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-06-05 15:22:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9565217391304348) internal successors, (180), 92 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-06-05 15:22:42,469 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-06-05 15:22:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:42,469 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-06-05 15:22:42,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-06-05 15:22:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 15:22:42,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:42,470 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:42,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:42,685 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:42,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-06-05 15:22:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:42,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721282710] [2021-06-05 15:22:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:42,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:42,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721282710] [2021-06-05 15:22:42,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721282710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:42,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398131024] [2021-06-05 15:22:42,743 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 [2021-06-05 15:22:42,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 15:22:42,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:42,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:22:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:42,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398131024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:42,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:42,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:22:42,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122917224] [2021-06-05 15:22:42,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:22:42,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:42,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:22:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:22:42,940 INFO L87 Difference]: Start difference. First operand 93 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:43,292 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-06-05 15:22:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:22:43,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 15:22:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:43,294 INFO L225 Difference]: With dead ends: 240 [2021-06-05 15:22:43,294 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 15:22:43,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:22:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 15:22:43,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-06-05 15:22:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-06-05 15:22:43,298 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-06-05 15:22:43,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:43,298 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-06-05 15:22:43,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-06-05 15:22:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 15:22:43,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:43,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:43,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:43,505 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-06-05 15:22:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:43,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954608825] [2021-06-05 15:22:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:43,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954608825] [2021-06-05 15:22:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954608825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:43,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059437247] [2021-06-05 15:22:43,545 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 [2021-06-05 15:22:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:43,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:22:43,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:43,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059437247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:43,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:43,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 15:22:43,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057571784] [2021-06-05 15:22:43,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:22:43,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:22:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:22:43,645 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:43,667 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-06-05 15:22:43,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:22:43,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 15:22:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:43,669 INFO L225 Difference]: With dead ends: 222 [2021-06-05 15:22:43,669 INFO L226 Difference]: Without dead ends: 189 [2021-06-05 15:22:43,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:22:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-05 15:22:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-06-05 15:22:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.075862068965517) internal successors, (301), 145 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-06-05 15:22:43,677 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-06-05 15:22:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:43,677 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-06-05 15:22:43,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-06-05 15:22:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:22:43,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:43,679 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:43,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:22:43,890 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-06-05 15:22:43,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:43,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258749145] [2021-06-05 15:22:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:43,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258749145] [2021-06-05 15:22:43,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258749145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:43,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005550298] [2021-06-05 15:22:43,978 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 [2021-06-05 15:22:44,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:44,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:22:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:44,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005550298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:44,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:44,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:22:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301034527] [2021-06-05 15:22:44,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:22:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:22:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:22:44,180 INFO L87 Difference]: Start difference. First operand 146 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:44,806 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-06-05 15:22:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:22:44,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:22:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:44,811 INFO L225 Difference]: With dead ends: 562 [2021-06-05 15:22:44,811 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 15:22:44,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:22:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 15:22:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-06-05 15:22:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9824561403508771) internal successors, (226), 114 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-06-05 15:22:44,816 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-06-05 15:22:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:44,816 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-06-05 15:22:44,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-06-05 15:22:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 15:22:44,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:44,817 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:45,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:45,034 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-06-05 15:22:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:45,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029426885] [2021-06-05 15:22:45,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:45,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029426885] [2021-06-05 15:22:45,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029426885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:45,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653776157] [2021-06-05 15:22:45,095 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 [2021-06-05 15:22:45,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 15:22:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:22:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:45,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:45,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653776157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:45,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:45,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 15:22:45,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565262471] [2021-06-05 15:22:45,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:22:45,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:22:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:22:45,299 INFO L87 Difference]: Start difference. First operand 115 states and 226 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:45,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:45,957 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-06-05 15:22:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:22:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 15:22:45,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:45,959 INFO L225 Difference]: With dead ends: 352 [2021-06-05 15:22:45,959 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 15:22:45,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:22:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 15:22:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-06-05 15:22:45,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.9901960784313726) internal successors, (203), 102 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:45,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-06-05 15:22:45,963 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-06-05 15:22:45,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:45,963 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-06-05 15:22:45,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-06-05 15:22:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 15:22:45,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:45,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:46,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:46,184 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:46,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-06-05 15:22:46,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:46,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577556514] [2021-06-05 15:22:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:46,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577556514] [2021-06-05 15:22:46,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577556514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046833229] [2021-06-05 15:22:46,228 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) [2021-06-05 15:22:46,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:22:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046833229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:46,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 15:22:46,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422520460] [2021-06-05 15:22:46,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:22:46,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:22:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:22:46,305 INFO L87 Difference]: Start difference. First operand 103 states and 203 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:46,342 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-06-05 15:22:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:22:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 15:22:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:46,345 INFO L225 Difference]: With dead ends: 281 [2021-06-05 15:22:46,345 INFO L226 Difference]: Without dead ends: 242 [2021-06-05 15:22:46,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:22:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-05 15:22:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-06-05 15:22:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.097297297297297) internal successors, (388), 185 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-06-05 15:22:46,351 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-06-05 15:22:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:46,351 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-06-05 15:22:46,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-06-05 15:22:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:22:46,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:46,352 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:46,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 15:22:46,565 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-06-05 15:22:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:46,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100912102] [2021-06-05 15:22:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100912102] [2021-06-05 15:22:46,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100912102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647658362] [2021-06-05 15:22:46,658 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 [2021-06-05 15:22:46,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:22:46,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:22:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647658362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:46,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:46,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 15:22:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143158764] [2021-06-05 15:22:46,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:22:46,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:22:46,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:22:46,874 INFO L87 Difference]: Start difference. First operand 186 states and 388 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:47,939 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-06-05 15:22:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:22:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:22:47,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:47,942 INFO L225 Difference]: With dead ends: 787 [2021-06-05 15:22:47,942 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 15:22:47,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 846.2ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:22:47,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 15:22:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-06-05 15:22:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.0) internal successors, (272), 136 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-06-05 15:22:47,948 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-06-05 15:22:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:47,948 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-06-05 15:22:47,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-06-05 15:22:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 15:22:47,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:47,949 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:48,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:22:48,149 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-06-05 15:22:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:48,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049100767] [2021-06-05 15:22:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:48,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049100767] [2021-06-05 15:22:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049100767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782458734] [2021-06-05 15:22:48,204 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 [2021-06-05 15:22:48,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 15:22:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:48,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:22:48,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:48,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782458734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:48,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:48,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 15:22:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365301107] [2021-06-05 15:22:48,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:22:48,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:22:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:22:48,412 INFO L87 Difference]: Start difference. First operand 137 states and 272 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:49,293 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-06-05 15:22:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:22:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 15:22:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:49,300 INFO L225 Difference]: With dead ends: 486 [2021-06-05 15:22:49,300 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 15:22:49,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 806.4ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:22:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 15:22:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-06-05 15:22:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-06-05 15:22:49,304 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-06-05 15:22:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:49,304 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-06-05 15:22:49,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-06-05 15:22:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 15:22:49,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:49,305 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:22:49,510 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:49,510 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-06-05 15:22:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322837618] [2021-06-05 15:22:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:49,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:49,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322837618] [2021-06-05 15:22:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322837618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:49,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662452068] [2021-06-05 15:22:49,573 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 [2021-06-05 15:22:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:22:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:49,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662452068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:49,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:49,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 15:22:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282651744] [2021-06-05 15:22:49,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:22:49,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:49,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:22:49,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:22:49,658 INFO L87 Difference]: Start difference. First operand 121 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:49,707 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-06-05 15:22:49,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:22:49,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 15:22:49,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:49,709 INFO L225 Difference]: With dead ends: 340 [2021-06-05 15:22:49,709 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 15:22:49,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:22:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 15:22:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-06-05 15:22:49,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.111111111111111) internal successors, (475), 225 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-06-05 15:22:49,716 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-06-05 15:22:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:49,716 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-06-05 15:22:49,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-06-05 15:22:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:22:49,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:49,717 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:49,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:49,925 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-06-05 15:22:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:49,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567349142] [2021-06-05 15:22:49,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:50,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:50,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567349142] [2021-06-05 15:22:50,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567349142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:50,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149122188] [2021-06-05 15:22:50,054 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 [2021-06-05 15:22:50,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:50,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:22:50,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:50,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149122188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:50,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:50,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 15:22:50,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141418204] [2021-06-05 15:22:50,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:22:50,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:22:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:22:50,323 INFO L87 Difference]: Start difference. First operand 226 states and 475 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:51,798 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-06-05 15:22:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:22:51,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:22:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:51,800 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 15:22:51,800 INFO L226 Difference]: Without dead ends: 884 [2021-06-05 15:22:51,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1249.5ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:22:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-05 15:22:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-06-05 15:22:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.0126582278481013) internal successors, (318), 158 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-06-05 15:22:51,808 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-06-05 15:22:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:51,808 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-06-05 15:22:51,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-06-05 15:22:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 15:22:51,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:51,809 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:52,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:22:52,025 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-06-05 15:22:52,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:52,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488651863] [2021-06-05 15:22:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:52,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:52,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488651863] [2021-06-05 15:22:52,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488651863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:52,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978961193] [2021-06-05 15:22:52,139 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 [2021-06-05 15:22:52,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 15:22:52,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:22:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:52,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978961193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:52,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:52,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-06-05 15:22:52,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745949926] [2021-06-05 15:22:52,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:22:52,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:22:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:22:52,418 INFO L87 Difference]: Start difference. First operand 159 states and 318 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:53,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:53,623 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-06-05 15:22:53,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:22:53,623 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 15:22:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:53,625 INFO L225 Difference]: With dead ends: 642 [2021-06-05 15:22:53,625 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 15:22:53,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:22:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 15:22:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-06-05 15:22:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-06-05 15:22:53,630 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-06-05 15:22:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:53,630 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-06-05 15:22:53,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-06-05 15:22:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 15:22:53,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:53,631 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:53,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:22:53,841 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:53,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-06-05 15:22:53,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:53,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519270393] [2021-06-05 15:22:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:53,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519270393] [2021-06-05 15:22:53,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519270393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:53,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699607405] [2021-06-05 15:22:53,925 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) [2021-06-05 15:22:53,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:22:53,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:53,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:22:53,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:54,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699607405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:54,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:54,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 15:22:54,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619289794] [2021-06-05 15:22:54,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:22:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:54,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:22:54,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:22:54,021 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:54,077 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-06-05 15:22:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:22:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 15:22:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:54,078 INFO L225 Difference]: With dead ends: 399 [2021-06-05 15:22:54,079 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 15:22:54,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:22:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 15:22:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-06-05 15:22:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.120754716981132) internal successors, (562), 265 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-06-05 15:22:54,084 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-06-05 15:22:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:54,084 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-06-05 15:22:54,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-06-05 15:22:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:22:54,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:54,085 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:54,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:54,301 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-06-05 15:22:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:54,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954806366] [2021-06-05 15:22:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:54,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954806366] [2021-06-05 15:22:54,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954806366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184878956] [2021-06-05 15:22:54,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:54,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 15:22:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:54,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:22:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:54,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184878956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:54,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:54,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-06-05 15:22:54,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95480424] [2021-06-05 15:22:54,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 15:22:54,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 15:22:54,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:22:54,763 INFO L87 Difference]: Start difference. First operand 266 states and 562 transitions. Second operand has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-06-05 15:22:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:56,677 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-06-05 15:22:56,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 15:22:56,677 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:22:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:56,680 INFO L225 Difference]: With dead ends: 1321 [2021-06-05 15:22:56,680 INFO L226 Difference]: Without dead ends: 1111 [2021-06-05 15:22:56,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1625.0ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 15:22:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-06-05 15:22:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-06-05 15:22:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.022222222222222) internal successors, (364), 180 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-06-05 15:22:56,688 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-06-05 15:22:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:56,688 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-06-05 15:22:56,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.235294117647059) internal successors, (76), 33 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) [2021-06-05 15:22:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-06-05 15:22:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 15:22:56,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:56,689 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:56,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:56,905 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-06-05 15:22:56,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:56,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775807527] [2021-06-05 15:22:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:56,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:56,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775807527] [2021-06-05 15:22:56,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775807527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:56,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65840577] [2021-06-05 15:22:56,992 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 [2021-06-05 15:22:57,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 15:22:57,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:57,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:22:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:57,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65840577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:57,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:57,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-06-05 15:22:57,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268205154] [2021-06-05 15:22:57,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:22:57,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:22:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:22:57,314 INFO L87 Difference]: Start difference. First operand 181 states and 364 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:59,004 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-06-05 15:22:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:22:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 15:22:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:59,007 INFO L225 Difference]: With dead ends: 820 [2021-06-05 15:22:59,007 INFO L226 Difference]: Without dead ends: 816 [2021-06-05 15:22:59,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1577.1ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 15:22:59,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-05 15:22:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-06-05 15:22:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.032051282051282) internal successors, (317), 156 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) [2021-06-05 15:22:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-06-05 15:22:59,013 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-06-05 15:22:59,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:59,013 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-06-05 15:22:59,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,013 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-06-05 15:22:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 15:22:59,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:59,014 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:59,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:59,227 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-06-05 15:22:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:59,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136959417] [2021-06-05 15:22:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:59,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:59,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136959417] [2021-06-05 15:22:59,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136959417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:59,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478064536] [2021-06-05 15:22:59,293 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 [2021-06-05 15:22:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:59,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:22:59,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:59,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478064536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:59,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:59,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 15:22:59,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843372019] [2021-06-05 15:22:59,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:22:59,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:59,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:22:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:59,400 INFO L87 Difference]: Start difference. First operand 157 states and 317 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:59,476 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-06-05 15:22:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:22:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 15:22:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:59,477 INFO L225 Difference]: With dead ends: 458 [2021-06-05 15:22:59,477 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 15:22:59,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:22:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 15:22:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-06-05 15:22:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.1278688524590166) internal successors, (649), 305 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-06-05 15:22:59,482 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-06-05 15:22:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:59,482 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-06-05 15:22:59,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:59,482 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-06-05 15:22:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:22:59,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:59,483 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:59,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:22:59,697 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:59,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:59,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-06-05 15:22:59,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:59,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523659451] [2021-06-05 15:22:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:59,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:59,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523659451] [2021-06-05 15:22:59,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523659451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:59,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717127557] [2021-06-05 15:22:59,850 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 [2021-06-05 15:22:59,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:22:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:22:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:00,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717127557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:00,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:00,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-06-05 15:23:00,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765782480] [2021-06-05 15:23:00,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 15:23:00,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 15:23:00,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:23:00,211 INFO L87 Difference]: Start difference. First operand 306 states and 649 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:02,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:02,626 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-06-05 15:23:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 15:23:02,626 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 15:23:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:02,629 INFO L225 Difference]: With dead ends: 1630 [2021-06-05 15:23:02,629 INFO L226 Difference]: Without dead ends: 1360 [2021-06-05 15:23:02,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2146.6ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 15:23:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-06-05 15:23:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-06-05 15:23:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.0297029702970297) internal successors, (410), 202 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-06-05 15:23:02,637 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-06-05 15:23:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:02,637 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-06-05 15:23:02,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 37 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-06-05 15:23:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 15:23:02,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:02,637 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:23:02,853 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-06-05 15:23:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790420443] [2021-06-05 15:23:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:02,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:02,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790420443] [2021-06-05 15:23:02,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790420443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:02,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137467488] [2021-06-05 15:23:02,933 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:02,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 15:23:02,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:23:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:03,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137467488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:03,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:03,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-06-05 15:23:03,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289229482] [2021-06-05 15:23:03,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 15:23:03,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:03,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 15:23:03,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:23:03,287 INFO L87 Difference]: Start difference. First operand 203 states and 410 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 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) [2021-06-05 15:23:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:05,444 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-06-05 15:23:05,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 15:23:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 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) Word has length 45 [2021-06-05 15:23:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:05,447 INFO L225 Difference]: With dead ends: 1020 [2021-06-05 15:23:05,447 INFO L226 Difference]: Without dead ends: 1016 [2021-06-05 15:23:05,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2023.3ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 15:23:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-06-05 15:23:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-06-05 15:23:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.0402298850574714) internal successors, (355), 174 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:05,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-06-05 15:23:05,453 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-06-05 15:23:05,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:05,453 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-06-05 15:23:05,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 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) [2021-06-05 15:23:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-06-05 15:23:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 15:23:05,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:05,454 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:05,669 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-06-05 15:23:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375709557] [2021-06-05 15:23:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:05,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375709557] [2021-06-05 15:23:05,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375709557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505665108] [2021-06-05 15:23:05,754 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 [2021-06-05 15:23:05,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:05,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:23:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:05,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505665108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:05,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:05,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 15:23:05,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802318804] [2021-06-05 15:23:05,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:23:05,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:23:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:23:05,844 INFO L87 Difference]: Start difference. First operand 175 states and 355 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:05,939 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-06-05 15:23:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:23:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 15:23:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:05,940 INFO L225 Difference]: With dead ends: 517 [2021-06-05 15:23:05,940 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 15:23:05,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:23:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 15:23:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-06-05 15:23:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.1333333333333333) internal successors, (736), 345 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-06-05 15:23:05,945 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-06-05 15:23:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:05,945 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-06-05 15:23:05,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:05,945 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-06-05 15:23:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:23:05,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:05,946 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:06,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:23:06,162 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-06-05 15:23:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:06,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048616696] [2021-06-05 15:23:06,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:06,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:06,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048616696] [2021-06-05 15:23:06,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048616696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:06,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701088836] [2021-06-05 15:23:06,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:06,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 15:23:06,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:23:06,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:06,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701088836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:06,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:06,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-06-05 15:23:06,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176481062] [2021-06-05 15:23:06,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:23:06,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:23:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:23:06,802 INFO L87 Difference]: Start difference. First operand 346 states and 736 transitions. Second operand has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:09,872 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-06-05 15:23:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-05 15:23:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:23:09,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:09,877 INFO L225 Difference]: With dead ends: 1967 [2021-06-05 15:23:09,877 INFO L226 Difference]: Without dead ends: 1631 [2021-06-05 15:23:09,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 2777.3ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 15:23:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-06-05 15:23:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-06-05 15:23:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.0357142857142856) internal successors, (456), 224 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-06-05 15:23:09,885 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-06-05 15:23:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:09,885 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-06-05 15:23:09,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 41 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,885 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-06-05 15:23:09,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 15:23:09,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:09,885 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:10,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:10,101 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:10,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:10,101 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-06-05 15:23:10,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:10,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918582675] [2021-06-05 15:23:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:10,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:10,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918582675] [2021-06-05 15:23:10,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918582675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:10,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136801355] [2021-06-05 15:23:10,210 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 [2021-06-05 15:23:10,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 15:23:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:23:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:10,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136801355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:10,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:10,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-06-05 15:23:10,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925952425] [2021-06-05 15:23:10,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 15:23:10,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 15:23:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:23:10,604 INFO L87 Difference]: Start difference. First operand 225 states and 456 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:13,301 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-06-05 15:23:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-06-05 15:23:13,301 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 15:23:13,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:13,304 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 15:23:13,304 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 15:23:13,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2561.9ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 15:23:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 15:23:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-06-05 15:23:13,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.046875) internal successors, (393), 192 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-06-05 15:23:13,310 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-06-05 15:23:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-06-05 15:23:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-06-05 15:23:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 15:23:13,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:13,311 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:23:13,526 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-06-05 15:23:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685921808] [2021-06-05 15:23:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:13,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685921808] [2021-06-05 15:23:13,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685921808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:13,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879895716] [2021-06-05 15:23:13,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:23:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:13,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879895716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:13,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:13,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 15:23:13,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153359689] [2021-06-05 15:23:13,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:23:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:13,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:23:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:23:13,725 INFO L87 Difference]: Start difference. First operand 193 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:13,850 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-06-05 15:23:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:23:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 15:23:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:13,851 INFO L225 Difference]: With dead ends: 576 [2021-06-05 15:23:13,851 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 15:23:13,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:23:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 15:23:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-06-05 15:23:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.137662337662338) internal successors, (823), 385 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) [2021-06-05 15:23:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-06-05 15:23:13,856 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-06-05 15:23:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:13,856 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-06-05 15:23:13,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-06-05 15:23:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 15:23:13,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:13,857 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:14,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:23:14,063 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-06-05 15:23:14,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:14,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502306749] [2021-06-05 15:23:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:14,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:14,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502306749] [2021-06-05 15:23:14,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502306749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:14,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029577386] [2021-06-05 15:23:14,259 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 [2021-06-05 15:23:14,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:14,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:23:14,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029577386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:14,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:14,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-06-05 15:23:14,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529307574] [2021-06-05 15:23:14,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 15:23:14,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:14,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 15:23:14,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:23:14,740 INFO L87 Difference]: Start difference. First operand 386 states and 823 transitions. Second operand has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:18,621 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-06-05 15:23:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 15:23:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 15:23:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:18,626 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 15:23:18,626 INFO L226 Difference]: Without dead ends: 1924 [2021-06-05 15:23:18,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3396.8ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-06-05 15:23:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-06-05 15:23:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-06-05 15:23:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.040650406504065) internal successors, (502), 246 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-06-05 15:23:18,634 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-06-05 15:23:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:18,634 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-06-05 15:23:18,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.1739130434782608) internal successors, (100), 45 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-06-05 15:23:18,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 15:23:18,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:18,635 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:18,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:23:18,851 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:18,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-06-05 15:23:18,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:18,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026594935] [2021-06-05 15:23:18,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:18,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026594935] [2021-06-05 15:23:18,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026594935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:18,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146094786] [2021-06-05 15:23:18,949 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 [2021-06-05 15:23:18,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 15:23:18,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:23:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:19,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146094786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:19,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:19,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-06-05 15:23:19,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422269683] [2021-06-05 15:23:19,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 15:23:19,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:19,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 15:23:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:23:19,384 INFO L87 Difference]: Start difference. First operand 247 states and 502 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:22,762 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-06-05 15:23:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 15:23:22,763 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 15:23:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:22,766 INFO L225 Difference]: With dead ends: 1486 [2021-06-05 15:23:22,766 INFO L226 Difference]: Without dead ends: 1482 [2021-06-05 15:23:22,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3139.6ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-06-05 15:23:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-05 15:23:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-06-05 15:23:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.052380952380952) internal successors, (431), 210 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-06-05 15:23:22,772 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-06-05 15:23:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:22,773 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-06-05 15:23:22,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-06-05 15:23:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 15:23:22,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:22,773 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:22,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:22,989 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-06-05 15:23:22,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:22,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138939549] [2021-06-05 15:23:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:23,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138939549] [2021-06-05 15:23:23,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138939549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:23,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757935960] [2021-06-05 15:23:23,101 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 [2021-06-05 15:23:23,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:23,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:23:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:23,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757935960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:23,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:23,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 15:23:23,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823043911] [2021-06-05 15:23:23,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:23:23,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:23,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:23:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:23:23,198 INFO L87 Difference]: Start difference. First operand 211 states and 431 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:23,349 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-06-05 15:23:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:23:23,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 15:23:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:23,350 INFO L225 Difference]: With dead ends: 635 [2021-06-05 15:23:23,350 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 15:23:23,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:23:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 15:23:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-06-05 15:23:23,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.1411764705882352) internal successors, (910), 425 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:23,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-06-05 15:23:23,355 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-06-05 15:23:23,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:23,356 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-06-05 15:23:23,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-06-05 15:23:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 15:23:23,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:23,356 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:23,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:23:23,565 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:23,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:23,565 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-06-05 15:23:23,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:23,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102455659] [2021-06-05 15:23:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:23,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:23,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102455659] [2021-06-05 15:23:23,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102455659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:23,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014103691] [2021-06-05 15:23:23,837 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 [2021-06-05 15:23:23,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 15:23:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:23,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:23:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:24,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014103691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:24,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:24,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-06-05 15:23:24,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700953506] [2021-06-05 15:23:24,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 15:23:24,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:24,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 15:23:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:23:24,403 INFO L87 Difference]: Start difference. First operand 426 states and 910 transitions. Second operand has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:29,244 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-06-05 15:23:29,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 15:23:29,244 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 15:23:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:29,249 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 15:23:29,249 INFO L226 Difference]: Without dead ends: 2239 [2021-06-05 15:23:29,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4341.7ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-06-05 15:23:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-06-05 15:23:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-06-05 15:23:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.044776119402985) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:29,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-06-05 15:23:29,261 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-06-05 15:23:29,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:29,261 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-06-05 15:23:29,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.16) internal successors, (108), 49 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-06-05 15:23:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 15:23:29,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:29,262 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:29,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:29,477 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-06-05 15:23:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:29,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694644858] [2021-06-05 15:23:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:29,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:29,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694644858] [2021-06-05 15:23:29,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694644858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:29,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430903606] [2021-06-05 15:23:29,609 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 [2021-06-05 15:23:29,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 15:23:29,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:23:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430903606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:30,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:30,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-06-05 15:23:30,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755264935] [2021-06-05 15:23:30,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 15:23:30,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 15:23:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:23:30,151 INFO L87 Difference]: Start difference. First operand 269 states and 548 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:34,183 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-06-05 15:23:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-06-05 15:23:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 15:23:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:34,187 INFO L225 Difference]: With dead ends: 1752 [2021-06-05 15:23:34,187 INFO L226 Difference]: Without dead ends: 1748 [2021-06-05 15:23:34,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 3822.1ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-06-05 15:23:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-05 15:23:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-06-05 15:23:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.057017543859649) internal successors, (469), 228 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-06-05 15:23:34,195 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-06-05 15:23:34,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:34,196 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-06-05 15:23:34,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,196 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-06-05 15:23:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 15:23:34,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:34,196 INFO L521 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:34,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:23:34,412 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:34,412 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-06-05 15:23:34,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:34,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873602622] [2021-06-05 15:23:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:34,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873602622] [2021-06-05 15:23:34,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873602622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:34,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765690933] [2021-06-05 15:23:34,534 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 [2021-06-05 15:23:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:34,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:23:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:34,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765690933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:34,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:34,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 15:23:34,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529756924] [2021-06-05 15:23:34,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:23:34,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:34,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:23:34,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:23:34,644 INFO L87 Difference]: Start difference. First operand 229 states and 469 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:34,805 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-06-05 15:23:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:23:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 15:23:34,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:34,807 INFO L225 Difference]: With dead ends: 694 [2021-06-05 15:23:34,807 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 15:23:34,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:23:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 15:23:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-06-05 15:23:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.1440860215053763) internal successors, (997), 465 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-06-05 15:23:34,812 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-06-05 15:23:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:34,812 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-06-05 15:23:34,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-06-05 15:23:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 15:23:34,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:34,813 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:23:35,029 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-06-05 15:23:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941124676] [2021-06-05 15:23:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:35,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:35,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941124676] [2021-06-05 15:23:35,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941124676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:35,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005279295] [2021-06-05 15:23:35,300 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) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:35,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:23:35,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:23:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:35,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005279295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:35,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:35,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-06-05 15:23:35,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689952694] [2021-06-05 15:23:35,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:23:35,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:23:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:23:35,951 INFO L87 Difference]: Start difference. First operand 466 states and 997 transitions. Second operand has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:41,849 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-06-05 15:23:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-06-05 15:23:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 15:23:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:41,852 INFO L225 Difference]: With dead ends: 3146 [2021-06-05 15:23:41,852 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 15:23:41,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 5229.4ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-06-05 15:23:41,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 15:23:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-06-05 15:23:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.0482758620689654) internal successors, (594), 290 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-06-05 15:23:41,863 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-06-05 15:23:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:41,863 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-06-05 15:23:41,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-06-05 15:23:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 15:23:41,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:41,864 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:42,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:23:42,077 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-06-05 15:23:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:42,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580107546] [2021-06-05 15:23:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:42,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580107546] [2021-06-05 15:23:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580107546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933932110] [2021-06-05 15:23:42,206 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 [2021-06-05 15:23:42,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 15:23:42,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:23:42,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933932110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:42,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:42,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-06-05 15:23:42,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195691595] [2021-06-05 15:23:42,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 15:23:42,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 15:23:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:23:42,794 INFO L87 Difference]: Start difference. First operand 291 states and 594 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:47,793 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-06-05 15:23:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-06-05 15:23:47,794 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 15:23:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:47,796 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 15:23:47,796 INFO L226 Difference]: Without dead ends: 2036 [2021-06-05 15:23:47,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 4653.9ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-06-05 15:23:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-05 15:23:47,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-06-05 15:23:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.0609756097560976) internal successors, (507), 246 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-06-05 15:23:47,804 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-06-05 15:23:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:47,804 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-06-05 15:23:47,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 41 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:47,805 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-06-05 15:23:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 15:23:47,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:47,805 INFO L521 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:48,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:23:48,006 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:48,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-06-05 15:23:48,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:48,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982310908] [2021-06-05 15:23:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982310908] [2021-06-05 15:23:48,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982310908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:48,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365587628] [2021-06-05 15:23:48,147 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 [2021-06-05 15:23:48,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:48,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:23:48,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:48,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365587628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:48,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:48,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 15:23:48,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398406690] [2021-06-05 15:23:48,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:23:48,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:23:48,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:23:48,262 INFO L87 Difference]: Start difference. First operand 247 states and 507 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:48,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:48,467 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-06-05 15:23:48,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:23:48,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 15:23:48,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:48,469 INFO L225 Difference]: With dead ends: 753 [2021-06-05 15:23:48,469 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 15:23:48,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:23:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 15:23:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-06-05 15:23:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.1465346534653467) internal successors, (1084), 505 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-06-05 15:23:48,474 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-06-05 15:23:48,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:48,474 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-06-05 15:23:48,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:48,474 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-06-05 15:23:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 15:23:48,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:48,475 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:48,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:23:48,676 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-06-05 15:23:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:48,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75147866] [2021-06-05 15:23:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:48,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75147866] [2021-06-05 15:23:48,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75147866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97971025] [2021-06-05 15:23:48,995 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 [2021-06-05 15:23:49,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 15:23:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:23:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97971025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:49,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-06-05 15:23:49,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103902719] [2021-06-05 15:23:49,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-06-05 15:23:49,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:49,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-06-05 15:23:49,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:23:49,673 INFO L87 Difference]: Start difference. First operand 506 states and 1084 transitions. Second operand has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:56,947 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-06-05 15:23:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-05 15:23:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 15:23:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:56,950 INFO L225 Difference]: With dead ends: 3595 [2021-06-05 15:23:56,950 INFO L226 Difference]: Without dead ends: 2935 [2021-06-05 15:23:56,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 6366.6ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-06-05 15:23:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-06-05 15:23:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-06-05 15:23:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.051282051282051) internal successors, (640), 312 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-06-05 15:23:56,961 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-06-05 15:23:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:56,962 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-06-05 15:23:56,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-06-05 15:23:56,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 15:23:56,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:56,962 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:57,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:23:57,173 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-06-05 15:23:57,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:57,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280396319] [2021-06-05 15:23:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:57,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:57,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280396319] [2021-06-05 15:23:57,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280396319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:57,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631719626] [2021-06-05 15:23:57,313 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 [2021-06-05 15:23:57,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 15:23:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:23:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631719626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:57,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:57,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-06-05 15:23:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945701502] [2021-06-05 15:23:57,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 15:23:57,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 15:23:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:23:57,968 INFO L87 Difference]: Start difference. First operand 313 states and 640 transitions. Second operand has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:03,913 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-06-05 15:24:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-06-05 15:24:03,913 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 15:24:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:03,915 INFO L225 Difference]: With dead ends: 2350 [2021-06-05 15:24:03,915 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 15:24:03,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 5599.6ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-06-05 15:24:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 15:24:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-06-05 15:24:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.0643939393939394) internal successors, (545), 264 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-06-05 15:24:03,925 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-06-05 15:24:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:03,925 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-06-05 15:24:03,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 44 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-06-05 15:24:03,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 15:24:03,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:03,926 INFO L521 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:04,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:24:04,132 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:04,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:04,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-06-05 15:24:04,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:04,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552806693] [2021-06-05 15:24:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:04,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:04,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552806693] [2021-06-05 15:24:04,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552806693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:04,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821238711] [2021-06-05 15:24:04,267 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 [2021-06-05 15:24:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:04,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:24:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:04,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821238711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:04,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:04,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 15:24:04,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385483253] [2021-06-05 15:24:04,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:24:04,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:04,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:24:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:24:04,390 INFO L87 Difference]: Start difference. First operand 265 states and 545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:04,608 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-06-05 15:24:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:24:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 15:24:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:04,609 INFO L225 Difference]: With dead ends: 812 [2021-06-05 15:24:04,609 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 15:24:04,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:24:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 15:24:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-06-05 15:24:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 2.148623853211009) internal successors, (1171), 545 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-06-05 15:24:04,615 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-06-05 15:24:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:04,615 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-06-05 15:24:04,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-06-05 15:24:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 15:24:04,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:04,616 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:04,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:24:04,830 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:04,831 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-06-05 15:24:04,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:04,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186148520] [2021-06-05 15:24:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:05,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186148520] [2021-06-05 15:24:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186148520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105371411] [2021-06-05 15:24:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:05,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:05,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:05,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:24:05,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:05,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105371411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:05,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:05,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-06-05 15:24:05,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085467535] [2021-06-05 15:24:05,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-06-05 15:24:05,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-06-05 15:24:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:24:05,928 INFO L87 Difference]: Start difference. First operand 546 states and 1171 transitions. Second operand has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:14,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:14,712 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-06-05 15:24:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-06-05 15:24:14,713 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 15:24:14,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:14,716 INFO L225 Difference]: With dead ends: 4072 [2021-06-05 15:24:14,716 INFO L226 Difference]: Without dead ends: 3316 [2021-06-05 15:24:14,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 7576.5ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-06-05 15:24:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-06-05 15:24:14,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-06-05 15:24:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.053892215568862) internal successors, (686), 334 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-06-05 15:24:14,731 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-06-05 15:24:14,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:14,731 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-06-05 15:24:14,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.129032258064516) internal successors, (132), 61 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-06-05 15:24:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 15:24:14,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:14,732 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:14,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:14,945 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-06-05 15:24:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:14,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753777487] [2021-06-05 15:24:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:15,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753777487] [2021-06-05 15:24:15,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753777487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:15,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175156816] [2021-06-05 15:24:15,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:15,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 15:24:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:15,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:24:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:15,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175156816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:15,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:15,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-06-05 15:24:15,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017737099] [2021-06-05 15:24:15,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 15:24:15,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:15,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 15:24:15,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:24:15,793 INFO L87 Difference]: Start difference. First operand 335 states and 686 transitions. Second operand has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:23,073 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-06-05 15:24:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-05 15:24:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 15:24:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:23,076 INFO L225 Difference]: With dead ends: 2682 [2021-06-05 15:24:23,076 INFO L226 Difference]: Without dead ends: 2678 [2021-06-05 15:24:23,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 6720.2ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-06-05 15:24:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-06-05 15:24:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-06-05 15:24:23,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.0673758865248226) internal successors, (583), 282 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-06-05 15:24:23,087 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-06-05 15:24:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:23,087 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-06-05 15:24:23,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.6666666666666665) internal successors, (128), 47 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-06-05 15:24:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 15:24:23,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:23,088 INFO L521 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:23,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:23,301 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:23,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-06-05 15:24:23,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:23,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849526210] [2021-06-05 15:24:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:23,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:23,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849526210] [2021-06-05 15:24:23,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849526210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:23,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594399292] [2021-06-05 15:24:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:23,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:24:23,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:23,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 15:24:23,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:23,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594399292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:23,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:23,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 15:24:23,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530849679] [2021-06-05 15:24:23,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:24:23,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:24:23,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:24:23,595 INFO L87 Difference]: Start difference. First operand 283 states and 583 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-06-05 15:24:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:23,855 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-06-05 15:24:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:24:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 15:24:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:23,857 INFO L225 Difference]: With dead ends: 871 [2021-06-05 15:24:23,857 INFO L226 Difference]: Without dead ends: 772 [2021-06-05 15:24:23,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:24:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-06-05 15:24:23,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-06-05 15:24:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.1504273504273503) internal successors, (1258), 585 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-06-05 15:24:23,863 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-06-05 15:24:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:23,863 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-06-05 15:24:23,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 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) [2021-06-05 15:24:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-06-05 15:24:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-05 15:24:23,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:23,864 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:24,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:24:24,079 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-06-05 15:24:24,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:24,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460393540] [2021-06-05 15:24:24,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:24,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:24,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460393540] [2021-06-05 15:24:24,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460393540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:24,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634893445] [2021-06-05 15:24:24,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:24,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 15:24:24,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:24:24,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634893445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:25,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-06-05 15:24:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081551785] [2021-06-05 15:24:25,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 15:24:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 15:24:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:24:25,365 INFO L87 Difference]: Start difference. First operand 586 states and 1258 transitions. Second operand has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:36,106 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-06-05 15:24:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-06-05 15:24:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-06-05 15:24:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:36,110 INFO L225 Difference]: With dead ends: 4577 [2021-06-05 15:24:36,110 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 15:24:36,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 9168.5ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-06-05 15:24:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 15:24:36,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-06-05 15:24:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.056179775280899) internal successors, (732), 356 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-06-05 15:24:36,127 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-06-05 15:24:36,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:36,127 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-06-05 15:24:36,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.121212121212121) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:36,128 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-06-05 15:24:36,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-05 15:24:36,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:36,128 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:36,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:36,343 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-06-05 15:24:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:36,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404727982] [2021-06-05 15:24:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:36,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:36,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404727982] [2021-06-05 15:24:36,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404727982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:36,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130948402] [2021-06-05 15:24:36,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:36,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 15:24:36,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:36,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:24:36,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:37,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130948402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:37,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:37,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-06-05 15:24:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633404008] [2021-06-05 15:24:37,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 15:24:37,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 15:24:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:24:37,380 INFO L87 Difference]: Start difference. First operand 357 states and 732 transitions. Second operand has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:46,002 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-06-05 15:24:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-06-05 15:24:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-06-05 15:24:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:46,004 INFO L225 Difference]: With dead ends: 3036 [2021-06-05 15:24:46,004 INFO L226 Difference]: Without dead ends: 3032 [2021-06-05 15:24:46,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 8023.8ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-06-05 15:24:46,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-05 15:24:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-06-05 15:24:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.07) internal successors, (621), 300 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-06-05 15:24:46,018 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-06-05 15:24:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:46,018 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-06-05 15:24:46,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-06-05 15:24:46,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 15:24:46,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:46,018 INFO L521 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:46,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:46,222 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-06-05 15:24:46,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:46,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797483866] [2021-06-05 15:24:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:46,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797483866] [2021-06-05 15:24:46,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797483866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:46,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043693274] [2021-06-05 15:24:46,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 15:24:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043693274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:46,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:46,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 15:24:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990674212] [2021-06-05 15:24:46,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:24:46,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:24:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:24:46,568 INFO L87 Difference]: Start difference. First operand 301 states and 621 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:46,843 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-06-05 15:24:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:24:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 15:24:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:46,844 INFO L225 Difference]: With dead ends: 930 [2021-06-05 15:24:46,844 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 15:24:46,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:24:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 15:24:46,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-06-05 15:24:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.152) internal successors, (1345), 625 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-06-05 15:24:46,850 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-06-05 15:24:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:46,850 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-06-05 15:24:46,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-06-05 15:24:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-05 15:24:46,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:46,851 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:47,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 15:24:47,065 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-06-05 15:24:47,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:47,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342172496] [2021-06-05 15:24:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:47,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:47,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342172496] [2021-06-05 15:24:47,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342172496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:47,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123743184] [2021-06-05 15:24:47,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:47,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:24:47,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:24:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:48,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123743184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:48,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:48,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-06-05 15:24:48,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846820297] [2021-06-05 15:24:48,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-06-05 15:24:48,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:48,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-06-05 15:24:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:24:48,412 INFO L87 Difference]: Start difference. First operand 626 states and 1345 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:00,953 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-06-05 15:25:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-06-05 15:25:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-06-05 15:25:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:00,957 INFO L225 Difference]: With dead ends: 5110 [2021-06-05 15:25:00,957 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 15:25:00,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 10570.7ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-06-05 15:25:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 15:25:00,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-06-05 15:25:00,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.058201058201058) internal successors, (778), 378 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-06-05 15:25:00,974 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-06-05 15:25:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:00,974 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-06-05 15:25:00,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-06-05 15:25:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-05 15:25:00,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:00,975 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:01,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:25:01,189 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-06-05 15:25:01,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:01,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029263976] [2021-06-05 15:25:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:01,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029263976] [2021-06-05 15:25:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029263976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:01,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438174335] [2021-06-05 15:25:01,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:01,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 15:25:01,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:25:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:02,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438174335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:02,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:02,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-06-05 15:25:02,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59880117] [2021-06-05 15:25:02,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 15:25:02,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 15:25:02,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:25:02,267 INFO L87 Difference]: Start difference. First operand 379 states and 778 transitions. Second operand has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:13,108 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-06-05 15:25:13,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-06-05 15:25:13,108 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-06-05 15:25:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:13,111 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 15:25:13,111 INFO L226 Difference]: Without dead ends: 3408 [2021-06-05 15:25:13,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 9885.5ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-06-05 15:25:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-06-05 15:25:13,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-06-05 15:25:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.0723270440251573) internal successors, (659), 318 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:13,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-06-05 15:25:13,126 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-06-05 15:25:13,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:13,126 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-06-05 15:25:13,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.6666666666666665) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-06-05 15:25:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-05 15:25:13,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:13,127 INFO L521 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:13,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:25:13,336 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:13,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-06-05 15:25:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:13,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277176573] [2021-06-05 15:25:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:13,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:13,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277176573] [2021-06-05 15:25:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277176573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:13,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133641865] [2021-06-05 15:25:13,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:13,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:25:13,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 15:25:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:13,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133641865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:13,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:13,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 15:25:13,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716008599] [2021-06-05 15:25:13,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:25:13,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:13,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:25:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:25:13,720 INFO L87 Difference]: Start difference. First operand 319 states and 659 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:14,069 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-06-05 15:25:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:25:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-06-05 15:25:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:14,070 INFO L225 Difference]: With dead ends: 989 [2021-06-05 15:25:14,070 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 15:25:14,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:25:14,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 15:25:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-06-05 15:25:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 2.1533834586466165) internal successors, (1432), 665 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-06-05 15:25:14,076 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-06-05 15:25:14,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:14,076 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-06-05 15:25:14,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-06-05 15:25:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-05 15:25:14,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:14,077 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:14,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:14,293 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:14,294 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-06-05 15:25:14,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:14,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159343903] [2021-06-05 15:25:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:14,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159343903] [2021-06-05 15:25:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159343903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:14,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053503104] [2021-06-05 15:25:14,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:14,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 15:25:14,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:14,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:25:14,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053503104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:15,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:15,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-06-05 15:25:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497185601] [2021-06-05 15:25:15,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-06-05 15:25:15,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:15,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-06-05 15:25:15,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:25:15,893 INFO L87 Difference]: Start difference. First operand 666 states and 1432 transitions. Second operand has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:30,737 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-06-05 15:25:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-06-05 15:25:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-06-05 15:25:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:30,740 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 15:25:30,740 INFO L226 Difference]: Without dead ends: 4591 [2021-06-05 15:25:30,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 12822.0ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-06-05 15:25:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-05 15:25:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-06-05 15:25:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.06) internal successors, (824), 400 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-06-05 15:25:30,760 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-06-05 15:25:30,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:30,760 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-06-05 15:25:30,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.108108108108108) internal successors, (156), 73 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-06-05 15:25:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-05 15:25:30,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:30,761 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:30,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:25:30,976 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:30,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:30,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-06-05 15:25:30,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:30,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132884856] [2021-06-05 15:25:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:31,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132884856] [2021-06-05 15:25:31,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132884856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406303894] [2021-06-05 15:25:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:31,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-06-05 15:25:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:25:31,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:32,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406303894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:32,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:32,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-06-05 15:25:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923238960] [2021-06-05 15:25:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 15:25:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:32,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 15:25:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:25:32,110 INFO L87 Difference]: Start difference. First operand 401 states and 824 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:43,657 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-06-05 15:25:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-06-05 15:25:43,658 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-06-05 15:25:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:43,660 INFO L225 Difference]: With dead ends: 3810 [2021-06-05 15:25:43,660 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 15:25:43,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 10712.8ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-06-05 15:25:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 15:25:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-06-05 15:25:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.074404761904762) internal successors, (697), 336 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-06-05 15:25:43,676 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-06-05 15:25:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:43,676 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-06-05 15:25:43,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 56 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-06-05 15:25:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-05 15:25:43,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:43,677 INFO L521 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:43,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:43,878 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:43,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:43,878 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-06-05 15:25:43,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:43,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222456816] [2021-06-05 15:25:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:44,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222456816] [2021-06-05 15:25:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222456816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661697319] [2021-06-05 15:25:44,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 15:25:44,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:44,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661697319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:44,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:44,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 15:25:44,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101053812] [2021-06-05 15:25:44,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:25:44,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:25:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:25:44,260 INFO L87 Difference]: Start difference. First operand 337 states and 697 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:25:44,631 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-06-05 15:25:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:25:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-06-05 15:25:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:44,634 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 15:25:44,634 INFO L226 Difference]: Without dead ends: 931 [2021-06-05 15:25:44,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:25:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-06-05 15:25:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-06-05 15:25:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.1546099290780143) internal successors, (1519), 705 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:44,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-06-05 15:25:44,640 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-06-05 15:25:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:25:44,640 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-06-05 15:25:44,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:25:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-06-05 15:25:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 15:25:44,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:25:44,641 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:25:44,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:44,842 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:25:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:25:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-06-05 15:25:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:25:44,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170608116] [2021-06-05 15:25:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:25:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:25:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:45,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:25:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170608116] [2021-06-05 15:25:45,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170608116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:45,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756703763] [2021-06-05 15:25:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:25:45,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:25:45,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:25:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:25:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:25:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:25:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756703763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:25:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:25:46,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-06-05 15:25:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531185024] [2021-06-05 15:25:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 15:25:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:25:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 15:25:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:25:46,515 INFO L87 Difference]: Start difference. First operand 706 states and 1519 transitions. Second operand has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) [2021-06-05 15:26:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:03,329 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-06-05 15:26:03,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-06-05 15:26:03,330 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) Word has length 85 [2021-06-05 15:26:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:03,333 INFO L225 Difference]: With dead ends: 6260 [2021-06-05 15:26:03,333 INFO L226 Difference]: Without dead ends: 5060 [2021-06-05 15:26:03,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 14417.9ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-06-05 15:26:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-06-05 15:26:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-06-05 15:26:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.061611374407583) internal successors, (870), 422 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-06-05 15:26:03,356 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-06-05 15:26:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:03,356 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-06-05 15:26:03,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 77 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) [2021-06-05 15:26:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-06-05 15:26:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 15:26:03,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:03,357 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:03,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 15:26:03,558 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-06-05 15:26:03,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:03,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912166548] [2021-06-05 15:26:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:03,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912166548] [2021-06-05 15:26:03,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912166548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:03,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710069420] [2021-06-05 15:26:03,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:03,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-06-05 15:26:03,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:03,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 15:26:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:04,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710069420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:04,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:04,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-06-05 15:26:04,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324527032] [2021-06-05 15:26:04,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-06-05 15:26:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:04,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-06-05 15:26:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:26:04,895 INFO L87 Difference]: Start difference. First operand 423 states and 870 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:17,860 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-06-05 15:26:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-06-05 15:26:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 15:26:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:17,863 INFO L225 Difference]: With dead ends: 4230 [2021-06-05 15:26:17,863 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 15:26:17,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 12237.3ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-06-05 15:26:17,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 15:26:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-06-05 15:26:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.0762711864406778) internal successors, (735), 354 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) [2021-06-05 15:26:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-06-05 15:26:17,882 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-06-05 15:26:17,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:17,883 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-06-05 15:26:17,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 59 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:17,883 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-06-05 15:26:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-05 15:26:17,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:17,883 INFO L521 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:18,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:18,095 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-06-05 15:26:18,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:18,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815835897] [2021-06-05 15:26:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:18,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:18,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815835897] [2021-06-05 15:26:18,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815835897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:18,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194209191] [2021-06-05 15:26:18,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:18,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:26:18,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 15:26:18,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:18,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194209191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:18,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:18,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-06-05 15:26:18,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912624092] [2021-06-05 15:26:18,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:26:18,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:26:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:26:18,478 INFO L87 Difference]: Start difference. First operand 355 states and 735 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:18,866 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-06-05 15:26:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:26:18,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-06-05 15:26:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:18,868 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 15:26:18,868 INFO L226 Difference]: Without dead ends: 984 [2021-06-05 15:26:18,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:26:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-06-05 15:26:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-06-05 15:26:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.155704697986577) internal successors, (1606), 745 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-06-05 15:26:18,874 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-06-05 15:26:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:18,874 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-06-05 15:26:18,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-06-05 15:26:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 15:26:18,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:18,875 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:19,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 15:26:19,091 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:19,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:19,091 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-06-05 15:26:19,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:19,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396465078] [2021-06-05 15:26:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:19,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396465078] [2021-06-05 15:26:19,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396465078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:19,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108646029] [2021-06-05 15:26:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:19,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-06-05 15:26:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:19,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:20,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108646029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:20,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:20,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-06-05 15:26:20,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765828955] [2021-06-05 15:26:20,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-06-05 15:26:20,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-06-05 15:26:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:26:20,905 INFO L87 Difference]: Start difference. First operand 746 states and 1606 transitions. Second operand has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:40,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:40,436 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-06-05 15:26:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-06-05 15:26:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-06-05 15:26:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:40,441 INFO L225 Difference]: With dead ends: 6877 [2021-06-05 15:26:40,441 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 15:26:40,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 16534.7ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-06-05 15:26:40,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 15:26:40,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-06-05 15:26:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.063063063063063) internal successors, (916), 444 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-06-05 15:26:40,466 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-06-05 15:26:40,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:40,466 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-06-05 15:26:40,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.097560975609756) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-06-05 15:26:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 15:26:40,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:40,467 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:40,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:26:40,683 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-06-05 15:26:40,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:40,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963630247] [2021-06-05 15:26:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:40,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963630247] [2021-06-05 15:26:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963630247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7509481] [2021-06-05 15:26:40,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:41,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-06-05 15:26:41,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 15:26:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:42,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7509481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:42,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:42,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-06-05 15:26:42,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842894771] [2021-06-05 15:26:42,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 15:26:42,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:42,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 15:26:42,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:26:42,110 INFO L87 Difference]: Start difference. First operand 445 states and 916 transitions. Second operand has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:57,031 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-06-05 15:26:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-06-05 15:26:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-06-05 15:26:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:57,036 INFO L225 Difference]: With dead ends: 4672 [2021-06-05 15:26:57,036 INFO L226 Difference]: Without dead ends: 4668 [2021-06-05 15:26:57,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 13994.8ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-06-05 15:26:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-06-05 15:26:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-06-05 15:26:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.077956989247312) internal successors, (773), 372 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-06-05 15:26:57,060 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-06-05 15:26:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:57,060 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-06-05 15:26:57,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.6666666666666665) internal successors, (168), 62 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-06-05 15:26:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-05 15:26:57,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:57,061 INFO L521 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:57,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:57,273 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-06-05 15:26:57,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:57,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906549723] [2021-06-05 15:26:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:57,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:57,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906549723] [2021-06-05 15:26:57,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906549723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:57,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693452855] [2021-06-05 15:26:57,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:57,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 15:26:57,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693452855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:57,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:57,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 15:26:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325501106] [2021-06-05 15:26:57,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:26:57,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:26:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:26:57,671 INFO L87 Difference]: Start difference. First operand 373 states and 773 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:26:58,109 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-06-05 15:26:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:26:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-06-05 15:26:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:26:58,110 INFO L225 Difference]: With dead ends: 1166 [2021-06-05 15:26:58,110 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 15:26:58,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:26:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 15:26:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-06-05 15:26:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.156687898089172) internal successors, (1693), 785 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-06-05 15:26:58,117 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-06-05 15:26:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:58,117 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-06-05 15:26:58,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-06-05 15:26:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-05 15:26:58,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:58,117 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:58,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 15:26:58,318 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:58,318 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-06-05 15:26:58,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:58,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701437669] [2021-06-05 15:26:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:58,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701437669] [2021-06-05 15:26:58,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701437669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:58,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723935481] [2021-06-05 15:26:58,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:58,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:26:58,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:26:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:26:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723935481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:00,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:00,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-06-05 15:27:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703223585] [2021-06-05 15:27:00,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-06-05 15:27:00,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-06-05 15:27:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:27:00,220 INFO L87 Difference]: Start difference. First operand 786 states and 1693 transitions. Second operand has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:23,302 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-06-05 15:27:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-06-05 15:27:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-06-05 15:27:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:23,307 INFO L225 Difference]: With dead ends: 7522 [2021-06-05 15:27:23,307 INFO L226 Difference]: Without dead ends: 6064 [2021-06-05 15:27:23,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 18905.9ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-06-05 15:27:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-06-05 15:27:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-06-05 15:27:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.0643776824034337) internal successors, (962), 466 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-06-05 15:27:23,335 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-06-05 15:27:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:23,335 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-06-05 15:27:23,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-06-05 15:27:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-05 15:27:23,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:23,336 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:23,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:23,551 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:23,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-06-05 15:27:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092524008] [2021-06-05 15:27:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:23,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:23,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092524008] [2021-06-05 15:27:23,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092524008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:23,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019053224] [2021-06-05 15:27:23,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:23,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 15:27:23,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 15:27:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:25,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019053224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:25,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:25,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-06-05 15:27:25,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488885901] [2021-06-05 15:27:25,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-06-05 15:27:25,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-06-05 15:27:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:27:25,113 INFO L87 Difference]: Start difference. First operand 467 states and 962 transitions. Second operand has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:42,195 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2021-06-05 15:27:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-06-05 15:27:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-06-05 15:27:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:42,199 INFO L225 Difference]: With dead ends: 5136 [2021-06-05 15:27:42,199 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 15:27:42,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 16045.8ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-06-05 15:27:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 15:27:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-06-05 15:27:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.0794871794871796) internal successors, (811), 390 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-06-05 15:27:42,225 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-06-05 15:27:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:42,226 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-06-05 15:27:42,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.6666666666666665) internal successors, (176), 65 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-06-05 15:27:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 15:27:42,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:42,226 INFO L521 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:42,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:27:42,427 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-06-05 15:27:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:42,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211533871] [2021-06-05 15:27:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:42,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211533871] [2021-06-05 15:27:42,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211533871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:42,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489033545] [2021-06-05 15:27:42,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:42,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:27:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:42,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-06-05 15:27:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:42,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489033545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:42,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:42,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 15:27:42,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54284277] [2021-06-05 15:27:42,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:27:42,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:27:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:27:42,909 INFO L87 Difference]: Start difference. First operand 391 states and 811 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:27:43,370 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2021-06-05 15:27:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:27:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 15:27:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:27:43,371 INFO L225 Difference]: With dead ends: 1225 [2021-06-05 15:27:43,371 INFO L226 Difference]: Without dead ends: 1090 [2021-06-05 15:27:43,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:27:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-06-05 15:27:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-06-05 15:27:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.1575757575757577) internal successors, (1780), 825 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-06-05 15:27:43,378 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-06-05 15:27:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:27:43,378 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-06-05 15:27:43,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:27:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-06-05 15:27:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-05 15:27:43,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:27:43,379 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:27:43,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:43,593 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:27:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:27:43,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-06-05 15:27:43,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:27:43,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246101337] [2021-06-05 15:27:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:27:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:27:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:44,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:27:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246101337] [2021-06-05 15:27:44,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246101337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:44,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158554408] [2021-06-05 15:27:44,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:27:44,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 15:27:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:27:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:27:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:27:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:27:45,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158554408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:27:45,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:27:45,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-06-05 15:27:45,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389820942] [2021-06-05 15:27:45,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-06-05 15:27:45,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:27:45,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-06-05 15:27:45,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:27:45,662 INFO L87 Difference]: Start difference. First operand 826 states and 1780 transitions. Second operand has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:12,229 INFO L93 Difference]: Finished difference Result 8195 states and 16208 transitions. [2021-06-05 15:28:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-06-05 15:28:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-06-05 15:28:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:12,234 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 15:28:12,234 INFO L226 Difference]: Without dead ends: 6599 [2021-06-05 15:28:12,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 21584.3ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-06-05 15:28:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-06-05 15:28:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-06-05 15:28:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0655737704918034) internal successors, (1008), 488 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-06-05 15:28:12,265 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-06-05 15:28:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:12,265 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-06-05 15:28:12,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.088888888888889) internal successors, (188), 89 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-06-05 15:28:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-05 15:28:12,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:12,265 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:12,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 15:28:12,466 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-06-05 15:28:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:12,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139508662] [2021-06-05 15:28:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:12,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:12,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139508662] [2021-06-05 15:28:12,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139508662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:12,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105114639] [2021-06-05 15:28:12,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:12,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-06-05 15:28:12,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:12,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 15:28:12,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:14,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105114639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:14,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:14,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-06-05 15:28:14,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672274737] [2021-06-05 15:28:14,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 15:28:14,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:14,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 15:28:14,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:28:14,132 INFO L87 Difference]: Start difference. First operand 489 states and 1008 transitions. Second operand has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:33,443 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2021-06-05 15:28:33,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-06-05 15:28:33,443 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-06-05 15:28:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:33,447 INFO L225 Difference]: With dead ends: 5622 [2021-06-05 15:28:33,447 INFO L226 Difference]: Without dead ends: 5618 [2021-06-05 15:28:33,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178074 ImplicationChecksByTransitivity, 17863.6ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-06-05 15:28:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-06-05 15:28:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2021-06-05 15:28:33,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.0808823529411766) internal successors, (849), 408 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2021-06-05 15:28:33,474 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2021-06-05 15:28:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:33,474 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2021-06-05 15:28:33,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.6666666666666665) internal successors, (184), 68 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2021-06-05 15:28:33,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-06-05 15:28:33,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:33,475 INFO L521 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:33,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:33,689 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -57617479, now seen corresponding path program 61 times [2021-06-05 15:28:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:33,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692769306] [2021-06-05 15:28:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692769306] [2021-06-05 15:28:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692769306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980680250] [2021-06-05 15:28:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-05 15:28:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980680250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 15:28:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482353541] [2021-06-05 15:28:34,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:28:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:28:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:28:34,152 INFO L87 Difference]: Start difference. First operand 409 states and 849 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:28:34,675 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2021-06-05 15:28:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:28:34,676 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-06-05 15:28:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:28:34,677 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 15:28:34,677 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 15:28:34,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:28:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 15:28:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2021-06-05 15:28:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.1583815028901734) internal successors, (1867), 865 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2021-06-05 15:28:34,684 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2021-06-05 15:28:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:28:34,684 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2021-06-05 15:28:34,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:28:34,684 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2021-06-05 15:28:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-06-05 15:28:34,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:28:34,685 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:28:34,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 15:28:34,885 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:28:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:28:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1815225019, now seen corresponding path program 62 times [2021-06-05 15:28:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:28:34,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880433184] [2021-06-05 15:28:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:28:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:28:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:35,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:28:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880433184] [2021-06-05 15:28:35,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880433184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:35,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790857716] [2021-06-05 15:28:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:28:35,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:28:35,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:28:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:28:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:28:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:28:37,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790857716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:28:37,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:28:37,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-06-05 15:28:37,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832176911] [2021-06-05 15:28:37,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-06-05 15:28:37,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:28:37,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-06-05 15:28:37,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:28:37,125 INFO L87 Difference]: Start difference. First operand 866 states and 1867 transitions. Second operand has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:06,703 INFO L93 Difference]: Finished difference Result 8896 states and 17602 transitions. [2021-06-05 15:29:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-06-05 15:29:06,703 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-06-05 15:29:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:06,708 INFO L225 Difference]: With dead ends: 8896 [2021-06-05 15:29:06,708 INFO L226 Difference]: Without dead ends: 7156 [2021-06-05 15:29:06,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218377 ImplicationChecksByTransitivity, 24214.1ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-06-05 15:29:06,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-06-05 15:29:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 511. [2021-06-05 15:29:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.066666666666667) internal successors, (1054), 510 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2021-06-05 15:29:06,742 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2021-06-05 15:29:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:06,742 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2021-06-05 15:29:06,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0851063829787235) internal successors, (196), 93 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2021-06-05 15:29:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-06-05 15:29:06,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:06,743 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:06,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:06,944 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:06,944 INFO L82 PathProgramCache]: Analyzing trace with hash 195179061, now seen corresponding path program 63 times [2021-06-05 15:29:06,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:06,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189546665] [2021-06-05 15:29:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:07,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:07,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189546665] [2021-06-05 15:29:07,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189546665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:07,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836013326] [2021-06-05 15:29:07,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:07,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-06-05 15:29:07,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 15:29:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:08,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836013326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:08,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:08,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-06-05 15:29:08,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314528326] [2021-06-05 15:29:08,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-06-05 15:29:08,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-06-05 15:29:08,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:29:08,751 INFO L87 Difference]: Start difference. First operand 511 states and 1054 transitions. Second operand has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:30,548 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2021-06-05 15:29:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-06-05 15:29:30,548 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-06-05 15:29:30,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:30,552 INFO L225 Difference]: With dead ends: 6130 [2021-06-05 15:29:30,552 INFO L226 Difference]: Without dead ends: 6126 [2021-06-05 15:29:30,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211754 ImplicationChecksByTransitivity, 20161.5ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-06-05 15:29:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-06-05 15:29:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2021-06-05 15:29:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.0821596244131455) internal successors, (887), 426 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2021-06-05 15:29:30,583 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2021-06-05 15:29:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:30,583 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2021-06-05 15:29:30,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.6666666666666665) internal successors, (192), 71 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2021-06-05 15:29:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-06-05 15:29:30,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:30,583 INFO L521 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:30,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 15:29:30,784 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -248290439, now seen corresponding path program 64 times [2021-06-05 15:29:30,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:30,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287204467] [2021-06-05 15:29:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:31,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287204467] [2021-06-05 15:29:31,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287204467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:31,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303299080] [2021-06-05 15:29:31,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:31,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:29:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:31,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-05 15:29:31,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:31,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303299080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:31,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:31,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 15:29:31,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463507575] [2021-06-05 15:29:31,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:29:31,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:31,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:29:31,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:29:31,250 INFO L87 Difference]: Start difference. First operand 427 states and 887 transitions. Second operand has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:31,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:29:31,810 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2021-06-05 15:29:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:29:31,810 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-06-05 15:29:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:29:31,811 INFO L225 Difference]: With dead ends: 1343 [2021-06-05 15:29:31,811 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 15:29:31,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:29:31,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 15:29:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2021-06-05 15:29:31,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 2.1591160220994476) internal successors, (1954), 905 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-06-05 15:29:31,818 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2021-06-05 15:29:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:29:31,818 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-06-05 15:29:31,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.12) internal successors, (103), 25 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:29:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-06-05 15:29:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 15:29:31,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:29:31,819 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:29:32,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:29:32,020 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:29:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:29:32,020 INFO L82 PathProgramCache]: Analyzing trace with hash 28402043, now seen corresponding path program 65 times [2021-06-05 15:29:32,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:29:32,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030471246] [2021-06-05 15:29:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:29:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:29:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:32,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:29:32,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030471246] [2021-06-05 15:29:32,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030471246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:32,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356662932] [2021-06-05 15:29:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:29:32,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-06-05 15:29:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:29:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:29:32,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:29:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:29:34,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356662932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:29:34,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:29:34,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-06-05 15:29:34,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717970181] [2021-06-05 15:29:34,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-06-05 15:29:34,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:29:34,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-06-05 15:29:34,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 15:29:34,400 INFO L87 Difference]: Start difference. First operand 906 states and 1954 transitions. Second operand has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:09,584 INFO L93 Difference]: Finished difference Result 9625 states and 19052 transitions. [2021-06-05 15:30:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-06-05 15:30:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 15:30:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:09,590 INFO L225 Difference]: With dead ends: 9625 [2021-06-05 15:30:09,590 INFO L226 Difference]: Without dead ends: 7735 [2021-06-05 15:30:09,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258241 ImplicationChecksByTransitivity, 27691.4ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-06-05 15:30:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-06-05 15:30:09,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 533. [2021-06-05 15:30:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 2.0676691729323307) internal successors, (1100), 532 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2021-06-05 15:30:09,686 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2021-06-05 15:30:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:09,686 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2021-06-05 15:30:09,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0816326530612246) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2021-06-05 15:30:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 15:30:09,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:09,686 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:09,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 15:30:09,887 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash -972912839, now seen corresponding path program 66 times [2021-06-05 15:30:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:09,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059691202] [2021-06-05 15:30:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:10,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059691202] [2021-06-05 15:30:10,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059691202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:10,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621701881] [2021-06-05 15:30:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:10,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-06-05 15:30:10,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 15:30:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:11,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621701881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:11,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:11,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-06-05 15:30:11,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595220454] [2021-06-05 15:30:11,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-05 15:30:11,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:11,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-05 15:30:11,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:30:11,774 INFO L87 Difference]: Start difference. First operand 533 states and 1100 transitions. Second operand has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:37,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:37,681 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2021-06-05 15:30:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-06-05 15:30:37,682 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 15:30:37,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:37,687 INFO L225 Difference]: With dead ends: 6660 [2021-06-05 15:30:37,687 INFO L226 Difference]: Without dead ends: 6656 [2021-06-05 15:30:37,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250004 ImplicationChecksByTransitivity, 23673.9ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-06-05 15:30:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-06-05 15:30:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2021-06-05 15:30:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.0833333333333335) internal successors, (925), 444 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2021-06-05 15:30:37,718 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2021-06-05 15:30:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:37,718 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2021-06-05 15:30:37,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.6666666666666665) internal successors, (200), 74 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2021-06-05 15:30:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-06-05 15:30:37,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:37,718 INFO L521 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:37,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:37,919 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:37,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:37,919 INFO L82 PathProgramCache]: Analyzing trace with hash 601748025, now seen corresponding path program 67 times [2021-06-05 15:30:37,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:37,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946978324] [2021-06-05 15:30:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:38,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946978324] [2021-06-05 15:30:38,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946978324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:38,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484487388] [2021-06-05 15:30:38,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-05 15:30:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:38,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484487388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:38,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:38,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 15:30:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594991784] [2021-06-05 15:30:38,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 15:30:38,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:38,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 15:30:38,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:30:38,428 INFO L87 Difference]: Start difference. First operand 445 states and 925 transitions. Second operand has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:30:39,046 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2021-06-05 15:30:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:30:39,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-06-05 15:30:39,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:30:39,048 INFO L225 Difference]: With dead ends: 1402 [2021-06-05 15:30:39,048 INFO L226 Difference]: Without dead ends: 1249 [2021-06-05 15:30:39,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:30:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-05 15:30:39,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2021-06-05 15:30:39,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.15978835978836) internal successors, (2041), 945 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2021-06-05 15:30:39,055 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2021-06-05 15:30:39,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:30:39,055 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2021-06-05 15:30:39,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.115384615384615) internal successors, (107), 26 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:30:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2021-06-05 15:30:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-05 15:30:39,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:30:39,056 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:30:39,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 15:30:39,257 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:30:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:30:39,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825669, now seen corresponding path program 68 times [2021-06-05 15:30:39,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:30:39,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032023146] [2021-06-05 15:30:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:30:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:30:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:40,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:30:40,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032023146] [2021-06-05 15:30:40,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032023146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:40,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496847765] [2021-06-05 15:30:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:30:40,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:30:40,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:30:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:30:40,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:30:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:30:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496847765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:30:41,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:30:41,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-06-05 15:30:41,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874740224] [2021-06-05 15:30:41,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-06-05 15:30:41,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:30:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-06-05 15:30:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-06-05 15:30:41,905 INFO L87 Difference]: Start difference. First operand 946 states and 2041 transitions. Second operand has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:20,799 INFO L93 Difference]: Finished difference Result 10382 states and 20558 transitions. [2021-06-05 15:31:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-06-05 15:31:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-06-05 15:31:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:20,805 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 15:31:20,805 INFO L226 Difference]: Without dead ends: 8336 [2021-06-05 15:31:20,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303348 ImplicationChecksByTransitivity, 30789.2ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-06-05 15:31:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-06-05 15:31:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 555. [2021-06-05 15:31:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.068592057761733) internal successors, (1146), 554 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1146 transitions. [2021-06-05 15:31:20,848 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1146 transitions. Word has length 109 [2021-06-05 15:31:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:20,849 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1146 transitions. [2021-06-05 15:31:20,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0784313725490198) internal successors, (212), 101 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1146 transitions. [2021-06-05 15:31:20,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-06-05 15:31:20,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:20,849 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:21,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:21,061 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash -561063363, now seen corresponding path program 69 times [2021-06-05 15:31:21,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:21,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003691470] [2021-06-05 15:31:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:21,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:21,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003691470] [2021-06-05 15:31:21,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003691470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:21,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826549559] [2021-06-05 15:31:21,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:21,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-06-05 15:31:21,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:21,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 15:31:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826549559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:23,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:23,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-06-05 15:31:23,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119451710] [2021-06-05 15:31:23,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-06-05 15:31:23,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:23,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-06-05 15:31:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:31:23,106 INFO L87 Difference]: Start difference. First operand 555 states and 1146 transitions. Second operand has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:50,990 INFO L93 Difference]: Finished difference Result 7212 states and 14398 transitions. [2021-06-05 15:31:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-06-05 15:31:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-06-05 15:31:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:50,996 INFO L225 Difference]: With dead ends: 7212 [2021-06-05 15:31:50,996 INFO L226 Difference]: Without dead ends: 7208 [2021-06-05 15:31:51,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293220 ImplicationChecksByTransitivity, 25492.7ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-06-05 15:31:51,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-06-05 15:31:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 463. [2021-06-05 15:31:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0844155844155843) internal successors, (963), 462 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 963 transitions. [2021-06-05 15:31:51,037 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 963 transitions. Word has length 109 [2021-06-05 15:31:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:51,037 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 963 transitions. [2021-06-05 15:31:51,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.6666666666666665) internal successors, (208), 77 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 963 transitions. [2021-06-05 15:31:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-06-05 15:31:51,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:51,038 INFO L521 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:51,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 15:31:51,239 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1149059065, now seen corresponding path program 70 times [2021-06-05 15:31:51,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:51,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158786410] [2021-06-05 15:31:51,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:51,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:51,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158786410] [2021-06-05 15:31:51,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158786410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:51,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284874454] [2021-06-05 15:31:51,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:51,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:31:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:51,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-05 15:31:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284874454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:51,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:51,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-06-05 15:31:51,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018941745] [2021-06-05 15:31:51,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 15:31:51,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 15:31:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:31:51,838 INFO L87 Difference]: Start difference. First operand 463 states and 963 transitions. Second operand has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:31:52,506 INFO L93 Difference]: Finished difference Result 1461 states and 2884 transitions. [2021-06-05 15:31:52,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:31:52,506 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-06-05 15:31:52,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:31:52,507 INFO L225 Difference]: With dead ends: 1461 [2021-06-05 15:31:52,507 INFO L226 Difference]: Without dead ends: 1302 [2021-06-05 15:31:52,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:31:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-06-05 15:31:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 986. [2021-06-05 15:31:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.1604060913705583) internal successors, (2128), 985 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2128 transitions. [2021-06-05 15:31:52,515 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2128 transitions. Word has length 111 [2021-06-05 15:31:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:31:52,515 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 2128 transitions. [2021-06-05 15:31:52,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.111111111111111) internal successors, (111), 27 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:31:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2128 transitions. [2021-06-05 15:31:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-06-05 15:31:52,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:31:52,516 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:31:52,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:52,716 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:31:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:31:52,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1767498757, now seen corresponding path program 71 times [2021-06-05 15:31:52,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:31:52,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341645404] [2021-06-05 15:31:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:31:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:31:53,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:53,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:31:53,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341645404] [2021-06-05 15:31:53,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341645404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:53,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103115455] [2021-06-05 15:31:53,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:31:53,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-06-05 15:31:53,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:31:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:31:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:31:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:31:55,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103115455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:31:55,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:31:55,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-06-05 15:31:55,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074240006] [2021-06-05 15:31:55,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-06-05 15:31:55,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:31:55,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-06-05 15:31:55,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 15:31:55,553 INFO L87 Difference]: Start difference. First operand 986 states and 2128 transitions. Second operand has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:32:41,122 INFO L93 Difference]: Finished difference Result 11167 states and 22120 transitions. [2021-06-05 15:32:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-06-05 15:32:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-06-05 15:32:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:32:41,129 INFO L225 Difference]: With dead ends: 11167 [2021-06-05 15:32:41,129 INFO L226 Difference]: Without dead ends: 8959 [2021-06-05 15:32:41,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354141 ImplicationChecksByTransitivity, 34527.3ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-06-05 15:32:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-06-05 15:32:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 577. [2021-06-05 15:32:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.0694444444444446) internal successors, (1192), 576 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1192 transitions. [2021-06-05 15:32:41,176 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1192 transitions. Word has length 113 [2021-06-05 15:32:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:32:41,176 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1192 transitions. [2021-06-05 15:32:41,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:32:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1192 transitions. [2021-06-05 15:32:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-06-05 15:32:41,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:32:41,177 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:32:41,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:41,377 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:32:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:32:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash -770692287, now seen corresponding path program 72 times [2021-06-05 15:32:41,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:32:41,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160719942] [2021-06-05 15:32:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:32:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:32:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:41,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:32:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160719942] [2021-06-05 15:32:41,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160719942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899678873] [2021-06-05 15:32:41,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:32:41,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-06-05 15:32:41,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:32:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 15:32:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:32:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:32:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899678873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:32:43,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:32:43,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-06-05 15:32:43,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550302444] [2021-06-05 15:32:43,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-06-05 15:32:43,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:32:43,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-06-05 15:32:43,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:32:43,459 INFO L87 Difference]: Start difference. First operand 577 states and 1192 transitions. Second operand has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:14,649 INFO L93 Difference]: Finished difference Result 7786 states and 15546 transitions. [2021-06-05 15:33:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 730 states. [2021-06-05 15:33:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-06-05 15:33:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:14,655 INFO L225 Difference]: With dead ends: 7786 [2021-06-05 15:33:14,655 INFO L226 Difference]: Without dead ends: 7782 [2021-06-05 15:33:14,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 805 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341815 ImplicationChecksByTransitivity, 28651.2ms TimeCoverageRelationStatistics Valid=154598, Invalid=495844, Unknown=0, NotChecked=0, Total=650442 [2021-06-05 15:33:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2021-06-05 15:33:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 481. [2021-06-05 15:33:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.0854166666666667) internal successors, (1001), 480 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1001 transitions. [2021-06-05 15:33:14,699 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1001 transitions. Word has length 113 [2021-06-05 15:33:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:14,699 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1001 transitions. [2021-06-05 15:33:14,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.6666666666666665) internal successors, (216), 80 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1001 transitions. [2021-06-05 15:33:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 15:33:14,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:14,700 INFO L521 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:14,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:14,900 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1317932217, now seen corresponding path program 73 times [2021-06-05 15:33:14,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:14,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606345905] [2021-06-05 15:33:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:15,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:15,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606345905] [2021-06-05 15:33:15,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606345905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:15,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010519774] [2021-06-05 15:33:15,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-05 15:33:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:15,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010519774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:15,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:15,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-05 15:33:15,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691876211] [2021-06-05 15:33:15,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 15:33:15,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:15,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 15:33:15,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:33:15,464 INFO L87 Difference]: Start difference. First operand 481 states and 1001 transitions. Second operand has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:33:16,205 INFO L93 Difference]: Finished difference Result 1520 states and 3001 transitions. [2021-06-05 15:33:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:33:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 15:33:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:33:16,207 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 15:33:16,207 INFO L226 Difference]: Without dead ends: 1355 [2021-06-05 15:33:16,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:33:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-05 15:33:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1026. [2021-06-05 15:33:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 2.1609756097560977) internal successors, (2215), 1025 states have internal predecessors, (2215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 2215 transitions. [2021-06-05 15:33:16,215 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 2215 transitions. Word has length 115 [2021-06-05 15:33:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:33:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 2215 transitions. [2021-06-05 15:33:16,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.107142857142857) internal successors, (115), 28 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:33:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 2215 transitions. [2021-06-05 15:33:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-06-05 15:33:16,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:33:16,217 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:33:16,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 15:33:16,417 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:33:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:33:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1761941435, now seen corresponding path program 74 times [2021-06-05 15:33:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:33:16,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363144913] [2021-06-05 15:33:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:33:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:33:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:17,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:33:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363144913] [2021-06-05 15:33:17,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363144913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:17,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425772234] [2021-06-05 15:33:17,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:33:17,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:33:17,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:33:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:33:17,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:33:19,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 625 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:33:19,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425772234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:33:19,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:33:19,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2021-06-05 15:33:19,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323704231] [2021-06-05 15:33:19,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-06-05 15:33:19,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:33:19,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-06-05 15:33:19,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2000, Invalid=9990, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 15:33:19,420 INFO L87 Difference]: Start difference. First operand 1026 states and 2215 transitions. Second operand has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:10,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:10,324 INFO L93 Difference]: Finished difference Result 11980 states and 23738 transitions. [2021-06-05 15:34:10,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 784 states. [2021-06-05 15:34:10,324 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-06-05 15:34:10,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:10,331 INFO L225 Difference]: With dead ends: 11980 [2021-06-05 15:34:10,331 INFO L226 Difference]: Without dead ends: 9604 [2021-06-05 15:34:10,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 888 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411080 ImplicationChecksByTransitivity, 37914.7ms TimeCoverageRelationStatistics Valid=227665, Invalid=563545, Unknown=0, NotChecked=0, Total=791210 [2021-06-05 15:34:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9604 states. [2021-06-05 15:34:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9604 to 599. [2021-06-05 15:34:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0702341137123748) internal successors, (1238), 598 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1238 transitions. [2021-06-05 15:34:10,386 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1238 transitions. Word has length 117 [2021-06-05 15:34:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:10,387 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1238 transitions. [2021-06-05 15:34:10,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1238 transitions. [2021-06-05 15:34:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-06-05 15:34:10,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:10,387 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:10,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:10,588 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1295025595, now seen corresponding path program 75 times [2021-06-05 15:34:10,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:10,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827960594] [2021-06-05 15:34:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:10,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:10,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827960594] [2021-06-05 15:34:10,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827960594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:10,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727616190] [2021-06-05 15:34:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:11,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-06-05 15:34:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 15:34:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 651 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:12,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727616190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:12,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:12,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 55] total 83 [2021-06-05 15:34:12,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71807906] [2021-06-05 15:34:12,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-06-05 15:34:12,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:12,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-06-05 15:34:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1298, Invalid=5674, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:34:12,892 INFO L87 Difference]: Start difference. First operand 599 states and 1238 transitions. Second operand has 84 states, 84 states have (on average 2.6666666666666665) internal successors, (224), 83 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:47,680 INFO L93 Difference]: Finished difference Result 8382 states and 16738 transitions. [2021-06-05 15:34:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 785 states. [2021-06-05 15:34:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.6666666666666665) internal successors, (224), 83 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-06-05 15:34:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:47,687 INFO L225 Difference]: With dead ends: 8382 [2021-06-05 15:34:47,687 INFO L226 Difference]: Without dead ends: 8378 [2021-06-05 15:34:47,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 952 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 863 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396218 ImplicationChecksByTransitivity, 31381.4ms TimeCoverageRelationStatistics Valid=177824, Invalid=569536, Unknown=0, NotChecked=0, Total=747360 [2021-06-05 15:34:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-06-05 15:34:47,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 499. [2021-06-05 15:34:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0863453815261046) internal successors, (1039), 498 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1039 transitions. [2021-06-05 15:34:47,737 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1039 transitions. Word has length 117 [2021-06-05 15:34:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:47,737 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1039 transitions. [2021-06-05 15:34:47,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.6666666666666665) internal successors, (224), 83 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1039 transitions. [2021-06-05 15:34:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-06-05 15:34:47,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:47,738 INFO L521 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:47,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:47,938 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 85792889, now seen corresponding path program 76 times [2021-06-05 15:34:47,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:47,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829853120] [2021-06-05 15:34:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:48,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:48,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829853120] [2021-06-05 15:34:48,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829853120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:48,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888938213] [2021-06-05 15:34:48,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:48,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:34:48,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-05 15:34:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:48,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888938213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:48,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:48,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 15:34:48,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975059047] [2021-06-05 15:34:48,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 15:34:48,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:48,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 15:34:48,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:34:48,525 INFO L87 Difference]: Start difference. First operand 499 states and 1039 transitions. Second operand has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:34:49,289 INFO L93 Difference]: Finished difference Result 1579 states and 3118 transitions. [2021-06-05 15:34:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:34:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-06-05 15:34:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:34:49,291 INFO L225 Difference]: With dead ends: 1579 [2021-06-05 15:34:49,291 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 15:34:49,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:34:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 15:34:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1066. [2021-06-05 15:34:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 2.1615023474178403) internal successors, (2302), 1065 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 2302 transitions. [2021-06-05 15:34:49,299 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 2302 transitions. Word has length 119 [2021-06-05 15:34:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:34:49,299 INFO L482 AbstractCegarLoop]: Abstraction has 1066 states and 2302 transitions. [2021-06-05 15:34:49,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.103448275862069) internal successors, (119), 29 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:34:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 2302 transitions. [2021-06-05 15:34:49,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-06-05 15:34:49,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:34:49,307 INFO L521 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:34:49,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:34:49,508 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:34:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:34:49,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1489841541, now seen corresponding path program 77 times [2021-06-05 15:34:49,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:34:49,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858950804] [2021-06-05 15:34:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:34:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:34:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:50,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:34:50,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858950804] [2021-06-05 15:34:50,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858950804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:50,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174434512] [2021-06-05 15:34:50,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:34:50,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-06-05 15:34:50,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:34:50,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 15:34:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:34:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 676 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:34:52,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174434512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:34:52,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:34:52,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 113 [2021-06-05 15:34:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704675220] [2021-06-05 15:34:52,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-06-05 15:34:52,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:34:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-06-05 15:34:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2144, Invalid=10738, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 15:34:52,756 INFO L87 Difference]: Start difference. First operand 1066 states and 2302 transitions. Second operand has 114 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 113 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:35:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 580 states. [2021-06-05 15:35:28,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 15:35:28,002 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:35:28,003 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:35:28,005 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:35:28,005 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:35:28 BasicIcfg [2021-06-05 15:35:28,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:35:28,006 INFO L168 Benchmark]: Toolchain (without parser) took 769758.87 ms. Allocated memory was 329.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 308.9 MB in the beginning and 973.6 MB in the end (delta: -664.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory is still 309.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.52 ms. Allocated memory is still 329.3 MB. Free memory was 308.8 MB in the beginning and 307.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L168 Benchmark]: Boogie Preprocessor took 10.88 ms. Allocated memory is still 329.3 MB. Free memory was 307.3 MB in the beginning and 306.5 MB in the end (delta: 842.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L168 Benchmark]: RCFGBuilder took 265.75 ms. Allocated memory is still 329.3 MB. Free memory was 306.4 MB in the beginning and 294.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L168 Benchmark]: TraceAbstraction took 769458.18 ms. Allocated memory was 329.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 294.3 MB in the beginning and 973.6 MB in the end (delta: -679.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. [2021-06-05 15:35:28,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 329.3 MB. Free memory is still 309.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.52 ms. Allocated memory is still 329.3 MB. Free memory was 308.8 MB in the beginning and 307.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.88 ms. Allocated memory is still 329.3 MB. Free memory was 307.3 MB in the beginning and 306.5 MB in the end (delta: 842.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 265.75 ms. Allocated memory is still 329.3 MB. Free memory was 306.4 MB in the beginning and 294.8 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 769458.18 ms. Allocated memory was 329.3 MB in the beginning and 2.1 GB in the end (delta: 1.7 GB). Free memory was 294.3 MB in the beginning and 973.6 MB in the end (delta: -679.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1066states) and FLOYD_HOARE automaton (currently 580 states, 114 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 690 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1066states) and FLOYD_HOARE automaton (currently 580 states, 114 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 690 known predicates. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1066states) and FLOYD_HOARE automaton (currently 580 states, 114 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 690 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 769381.4ms, OverallIterations: 80, TraceHistogramMax: 27, EmptinessCheckTime: 65.1ms, AutomataDifference: 681786.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7397 SDtfs, 53800 SDslu, 139314 SDs, 0 SdLazy, 145770 SolverSat, 6710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61913.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23541 GetRequests, 4527 SyntacticMatches, 52 SemanticMatches, 18961 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5092310 ImplicationChecksByTransitivity, 578242.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1066occurred in iteration=79, InterpolantAutomatonStates: 15872, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 816.0ms AutomataMinimizationTime, 79 MinimizatonAttempts, 167663 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 476.9ms SsaConstructionTime, 1969.8ms SatisfiabilityAnalysisTime, 65920.9ms InterpolantComputationTime, 10796 NumberOfCodeBlocks, 10796 NumberOfCodeBlocksAsserted, 765 NumberOfCheckSat, 10638 ConstructedInterpolants, 0 QuantifiedInterpolants, 88506 SizeOfPredicates, 234 NumberOfNonLiveVariables, 13819 ConjunctsInSsa, 3094 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 24153/74517 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