/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:57:08,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:57:08,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:57:08,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:57:08,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 17:57:08,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:57:08,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:57:08,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:57:08,893 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:57:08,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:57:08,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:57:08,895 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:57:08,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:57:08,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:57:08,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:57:08,897 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:57:08,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:57:08,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:57:08,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:57:08,899 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:57:08,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:57:08,900 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:57:09,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:57:09,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:57:09,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:57:09,220 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:57:09,221 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:57:09,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl [2021-07-09 17:57:09,222 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure3.wvr.bpl' [2021-07-09 17:57:09,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:57:09,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:57:09,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:57:09,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:57:09,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:57:09,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:57:09,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:57:09,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:57:09,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:57:09,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/1) ... [2021-07-09 17:57:09,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:57:09,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:57:09,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:57:09,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:57:09,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (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 [2021-07-09 17:57:09,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:57:09,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:57:09,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:57:09,376 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:57:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:57:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:57:09,376 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:57:09,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:57:09,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:57:09,377 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:57:09,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:57:09,602 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:57:09,604 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:57:09 BoogieIcfgContainer [2021-07-09 17:57:09,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:57:09,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:57:09,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:57:09,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:57:09,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:57:09" (1/2) ... [2021-07-09 17:57:09,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab2bda3 and model type figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:57:09, skipping insertion in model container [2021-07-09 17:57:09,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:57:09" (2/2) ... [2021-07-09 17:57:09,611 INFO L111 eAbstractionObserver]: Analyzing ICFG figure3.wvr.bpl [2021-07-09 17:57:09,615 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:57:09,616 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:57:09,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:57:09,616 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:57:09,642 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:57:09,660 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:57:09,676 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:57:09,676 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:57:09,677 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:57:09,677 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:57:09,677 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:57:09,677 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:57:09,677 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:57:09,677 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:57:09,701 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-09 17:57:09,714 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:57:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 17:57:09,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:09,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:09,723 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:09,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:09,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1891492345, now seen corresponding path program 1 times [2021-07-09 17:57:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:09,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405117210] [2021-07-09 17:57:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:09,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:09,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405117210] [2021-07-09 17:57:09,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405117210] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:57:09,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:57:09,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:57:09,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632457947] [2021-07-09 17:57:09,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:57:09,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:09,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:57:09,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:57:09,888 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 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) [2021-07-09 17:57:09,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:09,920 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2021-07-09 17:57:09,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:57:09,923 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 [2021-07-09 17:57:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:09,931 INFO L225 Difference]: With dead ends: 58 [2021-07-09 17:57:09,931 INFO L226 Difference]: Without dead ends: 43 [2021-07-09 17:57:09,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:57:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-09 17:57:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-07-09 17:57:09,969 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) [2021-07-09 17:57:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-07-09 17:57:09,973 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-07-09 17:57:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:09,974 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-07-09 17:57:09,974 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) [2021-07-09 17:57:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-07-09 17:57:09,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:57:09,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:09,976 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:09,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:57:09,977 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:09,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:09,981 INFO L82 PathProgramCache]: Analyzing trace with hash -672639493, now seen corresponding path program 1 times [2021-07-09 17:57:09,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:09,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162268093] [2021-07-09 17:57:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162268093] [2021-07-09 17:57:10,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162268093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515348285] [2021-07-09 17:57:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:57:10,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515348285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:10,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 17:57:10,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698633769] [2021-07-09 17:57:10,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:57:10,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:57:10,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:10,354 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) [2021-07-09 17:57:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:10,502 INFO L93 Difference]: Finished difference Result 64 states and 109 transitions. [2021-07-09 17:57:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:57:10,502 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 [2021-07-09 17:57:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:10,503 INFO L225 Difference]: With dead ends: 64 [2021-07-09 17:57:10,504 INFO L226 Difference]: Without dead ends: 64 [2021-07-09 17:57:10,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:57:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-07-09 17:57:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2021-07-09 17:57:10,510 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) [2021-07-09 17:57:10,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2021-07-09 17:57:10,511 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 17 [2021-07-09 17:57:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:10,512 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2021-07-09 17:57:10,512 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) [2021-07-09 17:57:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2021-07-09 17:57:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:57:10,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:10,513 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:10,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 17:57:10,729 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1676307169, now seen corresponding path program 2 times [2021-07-09 17:57:10,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431838802] [2021-07-09 17:57:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431838802] [2021-07-09 17:57:10,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431838802] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:57:10,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:57:10,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 17:57:10,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294527025] [2021-07-09 17:57:10,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:57:10,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:57:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:10,780 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) [2021-07-09 17:57:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:10,866 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2021-07-09 17:57:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:57:10,868 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 [2021-07-09 17:57:10,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:10,871 INFO L225 Difference]: With dead ends: 51 [2021-07-09 17:57:10,874 INFO L226 Difference]: Without dead ends: 49 [2021-07-09 17:57:10,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-09 17:57:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-07-09 17:57:10,879 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) [2021-07-09 17:57:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-07-09 17:57:10,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-07-09 17:57:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:10,880 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-07-09 17:57:10,880 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) [2021-07-09 17:57:10,880 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-07-09 17:57:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 17:57:10,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:10,881 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:10,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:57:10,881 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1210697401, now seen corresponding path program 1 times [2021-07-09 17:57:10,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:10,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843093867] [2021-07-09 17:57:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:10,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:10,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843093867] [2021-07-09 17:57:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843093867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:10,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489170941] [2021-07-09 17:57:10,956 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 [2021-07-09 17:57:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:10,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:10,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489170941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:11,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:57:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135842904] [2021-07-09 17:57:11,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:57:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:57:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:57:11,056 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) [2021-07-09 17:57:11,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:11,077 INFO L93 Difference]: Finished difference Result 97 states and 174 transitions. [2021-07-09 17:57:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:57:11,078 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 [2021-07-09 17:57:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:11,080 INFO L225 Difference]: With dead ends: 97 [2021-07-09 17:57:11,080 INFO L226 Difference]: Without dead ends: 76 [2021-07-09 17:57:11,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:57:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-09 17:57:11,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-07-09 17:57:11,117 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) [2021-07-09 17:57:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 110 transitions. [2021-07-09 17:57:11,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 110 transitions. Word has length 19 [2021-07-09 17:57:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:11,118 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 110 transitions. [2021-07-09 17:57:11,118 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) [2021-07-09 17:57:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 110 transitions. [2021-07-09 17:57:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:57:11,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:11,119 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:11,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:11,329 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1830185403, now seen corresponding path program 2 times [2021-07-09 17:57:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:11,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545083959] [2021-07-09 17:57:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:11,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545083959] [2021-07-09 17:57:11,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545083959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316417336] [2021-07-09 17:57:11,413 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 [2021-07-09 17:57:11,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:11,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:11,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:11,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:11,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316417336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:11,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:11,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 17:57:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656183956] [2021-07-09 17:57:11,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:57:11,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:57:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:57:11,553 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) [2021-07-09 17:57:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:11,824 INFO L93 Difference]: Finished difference Result 174 states and 309 transitions. [2021-07-09 17:57:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:57:11,824 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 [2021-07-09 17:57:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:11,825 INFO L225 Difference]: With dead ends: 174 [2021-07-09 17:57:11,825 INFO L226 Difference]: Without dead ends: 168 [2021-07-09 17:57:11,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-09 17:57:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 68. [2021-07-09 17:57:11,831 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) [2021-07-09 17:57:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 130 transitions. [2021-07-09 17:57:11,832 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 130 transitions. Word has length 21 [2021-07-09 17:57:11,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:11,832 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 130 transitions. [2021-07-09 17:57:11,833 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) [2021-07-09 17:57:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 130 transitions. [2021-07-09 17:57:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 17:57:11,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:11,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:12,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:12,057 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:12,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:12,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1099819493, now seen corresponding path program 3 times [2021-07-09 17:57:12,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:12,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116590759] [2021-07-09 17:57:12,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:12,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116590759] [2021-07-09 17:57:12,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116590759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161016204] [2021-07-09 17:57:12,127 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 [2021-07-09 17:57:12,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:57:12,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:12,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:57:12,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:12,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161016204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:12,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:12,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 17:57:12,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463375263] [2021-07-09 17:57:12,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:57:12,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:12,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:57:12,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:12,348 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) [2021-07-09 17:57:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:12,721 INFO L93 Difference]: Finished difference Result 146 states and 268 transitions. [2021-07-09 17:57:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:57:12,721 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 [2021-07-09 17:57:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:12,722 INFO L225 Difference]: With dead ends: 146 [2021-07-09 17:57:12,722 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:57:12,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:57:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:57:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 67. [2021-07-09 17:57:12,727 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) [2021-07-09 17:57:12,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 127 transitions. [2021-07-09 17:57:12,728 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 127 transitions. Word has length 21 [2021-07-09 17:57:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:12,728 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 127 transitions. [2021-07-09 17:57:12,728 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) [2021-07-09 17:57:12,728 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 127 transitions. [2021-07-09 17:57:12,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:57:12,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:12,729 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:12,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:12,945 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:12,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1243736697, now seen corresponding path program 4 times [2021-07-09 17:57:12,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:12,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840456245] [2021-07-09 17:57:12,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840456245] [2021-07-09 17:57:13,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840456245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352360658] [2021-07-09 17:57:13,014 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 [2021-07-09 17:57:13,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352360658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:13,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:57:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053030060] [2021-07-09 17:57:13,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:57:13,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:57:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:57:13,118 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) [2021-07-09 17:57:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:13,142 INFO L93 Difference]: Finished difference Result 163 states and 310 transitions. [2021-07-09 17:57:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:57:13,143 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 [2021-07-09 17:57:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:13,144 INFO L225 Difference]: With dead ends: 163 [2021-07-09 17:57:13,144 INFO L226 Difference]: Without dead ends: 136 [2021-07-09 17:57:13,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:57:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-09 17:57:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-07-09 17:57:13,158 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) [2021-07-09 17:57:13,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-09 17:57:13,161 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 23 [2021-07-09 17:57:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:13,161 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-09 17:57:13,162 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) [2021-07-09 17:57:13,162 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-09 17:57:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:57:13,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:13,166 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-09 17:57:13,392 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 304168059, now seen corresponding path program 5 times [2021-07-09 17:57:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223384538] [2021-07-09 17:57:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:13,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223384538] [2021-07-09 17:57:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223384538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481850785] [2021-07-09 17:57:13,489 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 [2021-07-09 17:57:13,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:57:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:13,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:13,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481850785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:13,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:13,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 17:57:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113800383] [2021-07-09 17:57:13,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:57:13,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:57:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:57:13,753 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) [2021-07-09 17:57:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:14,319 INFO L93 Difference]: Finished difference Result 365 states and 692 transitions. [2021-07-09 17:57:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:57:14,321 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 [2021-07-09 17:57:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:14,323 INFO L225 Difference]: With dead ends: 365 [2021-07-09 17:57:14,323 INFO L226 Difference]: Without dead ends: 335 [2021-07-09 17:57:14,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:57:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-07-09 17:57:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 93. [2021-07-09 17:57:14,329 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) [2021-07-09 17:57:14,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 180 transitions. [2021-07-09 17:57:14,330 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 180 transitions. Word has length 25 [2021-07-09 17:57:14,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:14,330 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 180 transitions. [2021-07-09 17:57:14,330 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) [2021-07-09 17:57:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 180 transitions. [2021-07-09 17:57:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 17:57:14,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:14,331 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:14,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:14,545 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -413112599, now seen corresponding path program 6 times [2021-07-09 17:57:14,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:14,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780265643] [2021-07-09 17:57:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780265643] [2021-07-09 17:57:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780265643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407300799] [2021-07-09 17:57:14,609 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 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 [2021-07-09 17:57:14,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:57:14,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:57:14,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407300799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:14,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:14,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 17:57:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764482587] [2021-07-09 17:57:14,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:57:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:57:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:57:14,802 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) [2021-07-09 17:57:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:15,309 INFO L93 Difference]: Finished difference Result 240 states and 454 transitions. [2021-07-09 17:57:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:57:15,309 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 [2021-07-09 17:57:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:15,311 INFO L225 Difference]: With dead ends: 240 [2021-07-09 17:57:15,311 INFO L226 Difference]: Without dead ends: 236 [2021-07-09 17:57:15,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:57:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-09 17:57:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 85. [2021-07-09 17:57:15,315 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) [2021-07-09 17:57:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2021-07-09 17:57:15,316 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 25 [2021-07-09 17:57:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:15,316 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2021-07-09 17:57:15,316 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) [2021-07-09 17:57:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2021-07-09 17:57:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 17:57:15,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:15,317 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:15,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:15,530 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash -675082951, now seen corresponding path program 7 times [2021-07-09 17:57:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:15,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140654139] [2021-07-09 17:57:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:15,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140654139] [2021-07-09 17:57:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140654139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:15,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548608418] [2021-07-09 17:57:15,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:15,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548608418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:15,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:15,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:57:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114927631] [2021-07-09 17:57:15,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:57:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:57:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:15,702 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) [2021-07-09 17:57:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:15,735 INFO L93 Difference]: Finished difference Result 222 states and 427 transitions. [2021-07-09 17:57:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:57:15,736 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 [2021-07-09 17:57:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:15,737 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:57:15,737 INFO L226 Difference]: Without dead ends: 189 [2021-07-09 17:57:15,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:57:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-09 17:57:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 146. [2021-07-09 17:57:15,741 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) [2021-07-09 17:57:15,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 301 transitions. [2021-07-09 17:57:15,742 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 301 transitions. Word has length 27 [2021-07-09 17:57:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:15,743 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 301 transitions. [2021-07-09 17:57:15,743 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) [2021-07-09 17:57:15,743 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 301 transitions. [2021-07-09 17:57:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:57:15,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:15,744 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:15,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-09 17:57:15,957 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:15,957 INFO L82 PathProgramCache]: Analyzing trace with hash 199593531, now seen corresponding path program 8 times [2021-07-09 17:57:15,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:15,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542015930] [2021-07-09 17:57:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:16,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542015930] [2021-07-09 17:57:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542015930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985344195] [2021-07-09 17:57:16,082 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 [2021-07-09 17:57:16,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:16,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985344195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:16,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:16,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 17:57:16,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950237596] [2021-07-09 17:57:16,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:57:16,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:16,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:57:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:57:16,323 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) [2021-07-09 17:57:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:17,135 INFO L93 Difference]: Finished difference Result 562 states and 1078 transitions. [2021-07-09 17:57:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 17:57:17,135 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 [2021-07-09 17:57:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:17,138 INFO L225 Difference]: With dead ends: 562 [2021-07-09 17:57:17,139 INFO L226 Difference]: Without dead ends: 496 [2021-07-09 17:57:17,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 744.6ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:57:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-09 17:57:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 115. [2021-07-09 17:57:17,146 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) [2021-07-09 17:57:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 226 transitions. [2021-07-09 17:57:17,147 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 226 transitions. Word has length 29 [2021-07-09 17:57:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:17,147 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 226 transitions. [2021-07-09 17:57:17,147 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) [2021-07-09 17:57:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 226 transitions. [2021-07-09 17:57:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:57:17,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:17,148 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:17,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:17,361 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -827661843, now seen corresponding path program 9 times [2021-07-09 17:57:17,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:17,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401442146] [2021-07-09 17:57:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:17,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401442146] [2021-07-09 17:57:17,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401442146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323408211] [2021-07-09 17:57:17,426 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 [2021-07-09 17:57:17,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:57:17,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:57:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:17,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323408211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:17,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:17,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 17:57:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536125908] [2021-07-09 17:57:17,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:57:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:57:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:57:17,663 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) [2021-07-09 17:57:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:18,493 INFO L93 Difference]: Finished difference Result 352 states and 678 transitions. [2021-07-09 17:57:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:57:18,494 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 [2021-07-09 17:57:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:18,496 INFO L225 Difference]: With dead ends: 352 [2021-07-09 17:57:18,496 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:57:18,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:57:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:57:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 103. [2021-07-09 17:57:18,501 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) [2021-07-09 17:57:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 203 transitions. [2021-07-09 17:57:18,502 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 203 transitions. Word has length 29 [2021-07-09 17:57:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:18,502 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 203 transitions. [2021-07-09 17:57:18,503 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) [2021-07-09 17:57:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 203 transitions. [2021-07-09 17:57:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 17:57:18,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:18,503 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:18,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,715 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:18,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1908010745, now seen corresponding path program 10 times [2021-07-09 17:57:18,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:18,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038022005] [2021-07-09 17:57:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038022005] [2021-07-09 17:57:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038022005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091705651] [2021-07-09 17:57:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:18,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:18,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091705651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:18,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:18,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:57:18,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386639940] [2021-07-09 17:57:18,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:57:18,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:18,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:57:18,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:57:18,899 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) [2021-07-09 17:57:18,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:18,944 INFO L93 Difference]: Finished difference Result 281 states and 544 transitions. [2021-07-09 17:57:18,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:57:18,944 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 [2021-07-09 17:57:18,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:18,946 INFO L225 Difference]: With dead ends: 281 [2021-07-09 17:57:18,946 INFO L226 Difference]: Without dead ends: 242 [2021-07-09 17:57:18,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:57:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-07-09 17:57:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-07-09 17:57:18,951 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) [2021-07-09 17:57:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 388 transitions. [2021-07-09 17:57:18,952 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 388 transitions. Word has length 31 [2021-07-09 17:57:18,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:18,952 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 388 transitions. [2021-07-09 17:57:18,953 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) [2021-07-09 17:57:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 388 transitions. [2021-07-09 17:57:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:18,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:18,953 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:19,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 17:57:19,178 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:19,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash -556785925, now seen corresponding path program 11 times [2021-07-09 17:57:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:19,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858788393] [2021-07-09 17:57:19,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:19,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:19,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858788393] [2021-07-09 17:57:19,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858788393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:19,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760160979] [2021-07-09 17:57:19,331 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 [2021-07-09 17:57:19,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:57:19,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:57:19,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:19,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760160979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:19,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:19,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-09 17:57:19,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948074132] [2021-07-09 17:57:19,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:57:19,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:19,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:57:19,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:57:19,639 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) [2021-07-09 17:57:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:20,829 INFO L93 Difference]: Finished difference Result 787 states and 1520 transitions. [2021-07-09 17:57:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:57:20,829 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 [2021-07-09 17:57:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:20,832 INFO L225 Difference]: With dead ends: 787 [2021-07-09 17:57:20,832 INFO L226 Difference]: Without dead ends: 679 [2021-07-09 17:57:20,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 1044.7ms TimeCoverageRelationStatistics Valid=1299, Invalid=3671, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 17:57:20,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-07-09 17:57:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 137. [2021-07-09 17:57:20,841 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) [2021-07-09 17:57:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 272 transitions. [2021-07-09 17:57:20,842 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 272 transitions. Word has length 33 [2021-07-09 17:57:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:20,842 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 272 transitions. [2021-07-09 17:57:20,842 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) [2021-07-09 17:57:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 272 transitions. [2021-07-09 17:57:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-09 17:57:20,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:20,844 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-09 17:57:21,057 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1177967345, now seen corresponding path program 12 times [2021-07-09 17:57:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176557495] [2021-07-09 17:57:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176557495] [2021-07-09 17:57:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176557495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780701346] [2021-07-09 17:57:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:21,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:57:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:57:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:21,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780701346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:21,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:21,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 17:57:21,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953248359] [2021-07-09 17:57:21,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:57:21,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:21,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:57:21,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:57:21,436 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) [2021-07-09 17:57:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:22,538 INFO L93 Difference]: Finished difference Result 486 states and 946 transitions. [2021-07-09 17:57:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:57:22,538 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 [2021-07-09 17:57:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:22,541 INFO L225 Difference]: With dead ends: 486 [2021-07-09 17:57:22,541 INFO L226 Difference]: Without dead ends: 482 [2021-07-09 17:57:22,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 989.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:57:22,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-09 17:57:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 121. [2021-07-09 17:57:22,549 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) [2021-07-09 17:57:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 241 transitions. [2021-07-09 17:57:22,549 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 241 transitions. Word has length 33 [2021-07-09 17:57:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:22,550 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 241 transitions. [2021-07-09 17:57:22,550 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) [2021-07-09 17:57:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 241 transitions. [2021-07-09 17:57:22,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:57:22,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:22,550 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:22,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 17:57:22,765 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash 876826553, now seen corresponding path program 13 times [2021-07-09 17:57:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:22,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351512203] [2021-07-09 17:57:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:22,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351512203] [2021-07-09 17:57:22,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351512203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:22,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718202512] [2021-07-09 17:57:22,832 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 [2021-07-09 17:57:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:22,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:22,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718202512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:22,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:22,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:57:22,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600141666] [2021-07-09 17:57:22,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:57:22,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:22,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:57:22,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:57:22,928 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) [2021-07-09 17:57:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:22,998 INFO L93 Difference]: Finished difference Result 340 states and 661 transitions. [2021-07-09 17:57:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:57:22,998 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 [2021-07-09 17:57:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:23,000 INFO L225 Difference]: With dead ends: 340 [2021-07-09 17:57:23,000 INFO L226 Difference]: Without dead ends: 295 [2021-07-09 17:57:23,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:57:23,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-07-09 17:57:23,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 226. [2021-07-09 17:57:23,005 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) [2021-07-09 17:57:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 475 transitions. [2021-07-09 17:57:23,006 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 475 transitions. Word has length 35 [2021-07-09 17:57:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:23,006 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 475 transitions. [2021-07-09 17:57:23,006 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) [2021-07-09 17:57:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 475 transitions. [2021-07-09 17:57:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:57:23,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:23,007 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:23,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:23,221 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:23,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash -891441477, now seen corresponding path program 14 times [2021-07-09 17:57:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:23,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533151288] [2021-07-09 17:57:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:23,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533151288] [2021-07-09 17:57:23,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533151288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972514713] [2021-07-09 17:57:23,379 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 [2021-07-09 17:57:23,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:23,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:23,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972514713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:23,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:23,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-07-09 17:57:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800048045] [2021-07-09 17:57:23,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:57:23,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:23,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:57:23,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:57:23,763 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) [2021-07-09 17:57:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:25,504 INFO L93 Difference]: Finished difference Result 1040 states and 2018 transitions. [2021-07-09 17:57:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-09 17:57:25,504 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 [2021-07-09 17:57:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:25,507 INFO L225 Difference]: With dead ends: 1040 [2021-07-09 17:57:25,508 INFO L226 Difference]: Without dead ends: 884 [2021-07-09 17:57:25,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1470.8ms TimeCoverageRelationStatistics Valid=2085, Invalid=5925, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 17:57:25,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-07-09 17:57:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 159. [2021-07-09 17:57:25,517 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) [2021-07-09 17:57:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 318 transitions. [2021-07-09 17:57:25,518 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 318 transitions. Word has length 37 [2021-07-09 17:57:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:25,518 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 318 transitions. [2021-07-09 17:57:25,518 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) [2021-07-09 17:57:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 318 transitions. [2021-07-09 17:57:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-09 17:57:25,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:25,519 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:25,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:57:25,733 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:25,733 INFO L82 PathProgramCache]: Analyzing trace with hash 843829749, now seen corresponding path program 15 times [2021-07-09 17:57:25,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:25,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734124281] [2021-07-09 17:57:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:25,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734124281] [2021-07-09 17:57:25,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734124281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:25,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495620209] [2021-07-09 17:57:25,824 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 [2021-07-09 17:57:25,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:57:25,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:25,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:57:25,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495620209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:26,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:26,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2021-07-09 17:57:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445513451] [2021-07-09 17:57:26,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:57:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:57:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:57:26,144 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) [2021-07-09 17:57:27,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:27,600 INFO L93 Difference]: Finished difference Result 642 states and 1258 transitions. [2021-07-09 17:57:27,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:57:27,601 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 [2021-07-09 17:57:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:27,603 INFO L225 Difference]: With dead ends: 642 [2021-07-09 17:57:27,603 INFO L226 Difference]: Without dead ends: 638 [2021-07-09 17:57:27,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2298 ImplicationChecksByTransitivity, 1334.3ms TimeCoverageRelationStatistics Valid=1724, Invalid=5416, Unknown=0, NotChecked=0, Total=7140 [2021-07-09 17:57:27,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-09 17:57:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 139. [2021-07-09 17:57:27,610 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) [2021-07-09 17:57:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-07-09 17:57:27,610 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 37 [2021-07-09 17:57:27,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:27,611 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-07-09 17:57:27,611 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) [2021-07-09 17:57:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-07-09 17:57:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 17:57:27,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:27,612 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:27,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 17:57:27,823 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1395388281, now seen corresponding path program 16 times [2021-07-09 17:57:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:27,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522569332] [2021-07-09 17:57:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:27,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:27,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522569332] [2021-07-09 17:57:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522569332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:27,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773213476] [2021-07-09 17:57:27,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:27,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:27,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:27,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:57:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773213476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:28,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:57:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117979223] [2021-07-09 17:57:28,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:57:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:57:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:28,022 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) [2021-07-09 17:57:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:28,106 INFO L93 Difference]: Finished difference Result 399 states and 778 transitions. [2021-07-09 17:57:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:57:28,107 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 [2021-07-09 17:57:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:28,108 INFO L225 Difference]: With dead ends: 399 [2021-07-09 17:57:28,109 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 17:57:28,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:57:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 17:57:28,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 266. [2021-07-09 17:57:28,118 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) [2021-07-09 17:57:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 562 transitions. [2021-07-09 17:57:28,118 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 562 transitions. Word has length 39 [2021-07-09 17:57:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:28,119 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 562 transitions. [2021-07-09 17:57:28,119 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) [2021-07-09 17:57:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 562 transitions. [2021-07-09 17:57:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:28,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:28,120 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:28,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:28,331 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1201339771, now seen corresponding path program 17 times [2021-07-09 17:57:28,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:28,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087442179] [2021-07-09 17:57:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087442179] [2021-07-09 17:57:28,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087442179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507881482] [2021-07-09 17:57:28,507 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 [2021-07-09 17:57:28,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:57:28,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:57:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:28,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507881482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:28,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:28,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-07-09 17:57:28,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086057781] [2021-07-09 17:57:28,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 17:57:28,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 17:57:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:57:28,891 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) [2021-07-09 17:57:30,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:30,903 INFO L93 Difference]: Finished difference Result 1321 states and 2572 transitions. [2021-07-09 17:57:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 17:57:30,904 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 [2021-07-09 17:57:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:30,908 INFO L225 Difference]: With dead ends: 1321 [2021-07-09 17:57:30,908 INFO L226 Difference]: Without dead ends: 1111 [2021-07-09 17:57:30,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 1803.6ms TimeCoverageRelationStatistics Valid=3180, Invalid=9030, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 17:57:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-09 17:57:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 181. [2021-07-09 17:57:30,920 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) [2021-07-09 17:57:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 364 transitions. [2021-07-09 17:57:30,921 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 364 transitions. Word has length 41 [2021-07-09 17:57:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:30,921 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 364 transitions. [2021-07-09 17:57:30,921 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) [2021-07-09 17:57:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 364 transitions. [2021-07-09 17:57:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:57:30,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:30,922 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:31,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:31,137 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:31,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:31,137 INFO L82 PathProgramCache]: Analyzing trace with hash -860600583, now seen corresponding path program 18 times [2021-07-09 17:57:31,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:31,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121307672] [2021-07-09 17:57:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:31,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:31,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121307672] [2021-07-09 17:57:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121307672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:31,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153970412] [2021-07-09 17:57:31,254 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 [2021-07-09 17:57:31,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:57:31,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:57:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:31,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153970412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:31,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:31,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-07-09 17:57:31,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384249711] [2021-07-09 17:57:31,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 17:57:31,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 17:57:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:57:31,636 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) [2021-07-09 17:57:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:33,741 INFO L93 Difference]: Finished difference Result 820 states and 1614 transitions. [2021-07-09 17:57:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-09 17:57:33,741 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 [2021-07-09 17:57:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:33,744 INFO L225 Difference]: With dead ends: 820 [2021-07-09 17:57:33,744 INFO L226 Difference]: Without dead ends: 816 [2021-07-09 17:57:33,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3760 ImplicationChecksByTransitivity, 1911.8ms TimeCoverageRelationStatistics Valid=2606, Invalid=8314, Unknown=0, NotChecked=0, Total=10920 [2021-07-09 17:57:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-07-09 17:57:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 157. [2021-07-09 17:57:33,753 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) [2021-07-09 17:57:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 317 transitions. [2021-07-09 17:57:33,753 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 317 transitions. Word has length 41 [2021-07-09 17:57:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:33,753 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 317 transitions. [2021-07-09 17:57:33,754 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) [2021-07-09 17:57:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 317 transitions. [2021-07-09 17:57:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 17:57:33,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:33,754 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:33,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:33,979 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:33,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1781494215, now seen corresponding path program 19 times [2021-07-09 17:57:33,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:33,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978985405] [2021-07-09 17:57:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:34,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978985405] [2021-07-09 17:57:34,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978985405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964032728] [2021-07-09 17:57:34,075 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 [2021-07-09 17:57:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:57:34,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964032728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:34,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:57:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510068259] [2021-07-09 17:57:34,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:57:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:34,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:57:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:34,183 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) [2021-07-09 17:57:34,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:34,278 INFO L93 Difference]: Finished difference Result 458 states and 895 transitions. [2021-07-09 17:57:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:57:34,279 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 [2021-07-09 17:57:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:34,280 INFO L225 Difference]: With dead ends: 458 [2021-07-09 17:57:34,280 INFO L226 Difference]: Without dead ends: 401 [2021-07-09 17:57:34,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:57:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-07-09 17:57:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 306. [2021-07-09 17:57:34,286 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) [2021-07-09 17:57:34,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 649 transitions. [2021-07-09 17:57:34,287 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 649 transitions. Word has length 43 [2021-07-09 17:57:34,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:34,288 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 649 transitions. [2021-07-09 17:57:34,288 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) [2021-07-09 17:57:34,288 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 649 transitions. [2021-07-09 17:57:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 17:57:34,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:34,289 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:34,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 17:57:34,504 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2145072325, now seen corresponding path program 20 times [2021-07-09 17:57:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:34,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257321090] [2021-07-09 17:57:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:34,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:34,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257321090] [2021-07-09 17:57:34,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257321090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:34,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294698205] [2021-07-09 17:57:34,700 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 [2021-07-09 17:57:34,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:34,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:34,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:35,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294698205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:35,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:35,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-07-09 17:57:35,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949929487] [2021-07-09 17:57:35,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-09 17:57:35,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-09 17:57:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1143, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:57:35,189 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) [2021-07-09 17:57:37,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:37,930 INFO L93 Difference]: Finished difference Result 1630 states and 3182 transitions. [2021-07-09 17:57:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-07-09 17:57:37,930 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 [2021-07-09 17:57:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:37,934 INFO L225 Difference]: With dead ends: 1630 [2021-07-09 17:57:37,934 INFO L226 Difference]: Without dead ends: 1360 [2021-07-09 17:57:37,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 2527.0ms TimeCoverageRelationStatistics Valid=4657, Invalid=13165, Unknown=0, NotChecked=0, Total=17822 [2021-07-09 17:57:37,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-07-09 17:57:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 203. [2021-07-09 17:57:37,944 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) [2021-07-09 17:57:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 410 transitions. [2021-07-09 17:57:37,945 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 410 transitions. Word has length 45 [2021-07-09 17:57:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:37,945 INFO L482 AbstractCegarLoop]: Abstraction has 203 states and 410 transitions. [2021-07-09 17:57:37,945 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) [2021-07-09 17:57:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 410 transitions. [2021-07-09 17:57:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-09 17:57:37,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:37,946 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:38,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:57:38,170 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:38,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1689827837, now seen corresponding path program 21 times [2021-07-09 17:57:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:38,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851354508] [2021-07-09 17:57:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:38,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851354508] [2021-07-09 17:57:38,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851354508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375721653] [2021-07-09 17:57:38,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:57:38,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:57:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:38,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:57:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:38,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375721653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:38,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:38,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-07-09 17:57:38,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474431266] [2021-07-09 17:57:38,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:57:38,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:57:38,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:57:38,662 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) [2021-07-09 17:57:41,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:41,100 INFO L93 Difference]: Finished difference Result 1020 states and 2014 transitions. [2021-07-09 17:57:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-07-09 17:57:41,100 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 [2021-07-09 17:57:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:41,103 INFO L225 Difference]: With dead ends: 1020 [2021-07-09 17:57:41,103 INFO L226 Difference]: Without dead ends: 1016 [2021-07-09 17:57:41,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5828 ImplicationChecksByTransitivity, 2286.0ms TimeCoverageRelationStatistics Valid=3791, Invalid=12211, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 17:57:41,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-07-09 17:57:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 175. [2021-07-09 17:57:41,110 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) [2021-07-09 17:57:41,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 355 transitions. [2021-07-09 17:57:41,110 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 355 transitions. Word has length 45 [2021-07-09 17:57:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:41,111 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 355 transitions. [2021-07-09 17:57:41,111 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) [2021-07-09 17:57:41,111 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 355 transitions. [2021-07-09 17:57:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:57:41,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:41,112 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:41,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:41,334 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:41,334 INFO L82 PathProgramCache]: Analyzing trace with hash -753013767, now seen corresponding path program 22 times [2021-07-09 17:57:41,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:41,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163335594] [2021-07-09 17:57:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:41,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163335594] [2021-07-09 17:57:41,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163335594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:41,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184536028] [2021-07-09 17:57:41,460 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 [2021-07-09 17:57:41,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:57:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:41,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:57:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184536028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:41,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:41,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:57:41,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222111246] [2021-07-09 17:57:41,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:57:41,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:57:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:57:41,573 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) [2021-07-09 17:57:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:41,679 INFO L93 Difference]: Finished difference Result 517 states and 1012 transitions. [2021-07-09 17:57:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:57:41,679 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 [2021-07-09 17:57:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:41,680 INFO L225 Difference]: With dead ends: 517 [2021-07-09 17:57:41,680 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 17:57:41,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:57:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 17:57:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 346. [2021-07-09 17:57:41,703 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) [2021-07-09 17:57:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 736 transitions. [2021-07-09 17:57:41,705 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 736 transitions. Word has length 47 [2021-07-09 17:57:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:41,705 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 736 transitions. [2021-07-09 17:57:41,705 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) [2021-07-09 17:57:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 736 transitions. [2021-07-09 17:57:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 17:57:41,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:41,706 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:41,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 17:57:41,921 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -819472389, now seen corresponding path program 23 times [2021-07-09 17:57:41,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:41,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357848587] [2021-07-09 17:57:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:42,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357848587] [2021-07-09 17:57:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357848587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:42,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485444912] [2021-07-09 17:57:42,148 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 [2021-07-09 17:57:42,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:57:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:42,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:42,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:42,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485444912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:42,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:42,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-07-09 17:57:42,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86764756] [2021-07-09 17:57:42,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 17:57:42,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 17:57:42,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1405, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:57:42,677 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) [2021-07-09 17:57:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:46,179 INFO L93 Difference]: Finished difference Result 1967 states and 3848 transitions. [2021-07-09 17:57:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-07-09 17:57:46,180 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 [2021-07-09 17:57:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:46,184 INFO L225 Difference]: With dead ends: 1967 [2021-07-09 17:57:46,184 INFO L226 Difference]: Without dead ends: 1631 [2021-07-09 17:57:46,186 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 3194.3ms TimeCoverageRelationStatistics Valid=6597, Invalid=18525, Unknown=0, NotChecked=0, Total=25122 [2021-07-09 17:57:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-07-09 17:57:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 225. [2021-07-09 17:57:46,210 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) [2021-07-09 17:57:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 456 transitions. [2021-07-09 17:57:46,211 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 456 transitions. Word has length 49 [2021-07-09 17:57:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:46,211 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 456 transitions. [2021-07-09 17:57:46,211 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) [2021-07-09 17:57:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 456 transitions. [2021-07-09 17:57:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-07-09 17:57:46,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:46,212 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:46,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:57:46,417 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:46,417 INFO L82 PathProgramCache]: Analyzing trace with hash 522332929, now seen corresponding path program 24 times [2021-07-09 17:57:46,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:46,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161681789] [2021-07-09 17:57:46,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:46,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:46,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161681789] [2021-07-09 17:57:46,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161681789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:46,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590035572] [2021-07-09 17:57:46,553 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 [2021-07-09 17:57:46,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:57:46,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:46,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:57:46,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:47,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590035572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:47,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:47,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 32 [2021-07-09 17:57:47,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865521748] [2021-07-09 17:57:47,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 17:57:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 17:57:47,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:57:47,049 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) [2021-07-09 17:57:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:50,165 INFO L93 Difference]: Finished difference Result 1242 states and 2458 transitions. [2021-07-09 17:57:50,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-07-09 17:57:50,165 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 [2021-07-09 17:57:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:50,168 INFO L225 Difference]: With dead ends: 1242 [2021-07-09 17:57:50,168 INFO L226 Difference]: Without dead ends: 1238 [2021-07-09 17:57:50,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8651 ImplicationChecksByTransitivity, 2978.9ms TimeCoverageRelationStatistics Valid=5342, Invalid=17308, Unknown=0, NotChecked=0, Total=22650 [2021-07-09 17:57:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-07-09 17:57:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 193. [2021-07-09 17:57:50,175 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) [2021-07-09 17:57:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 393 transitions. [2021-07-09 17:57:50,176 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 393 transitions. Word has length 49 [2021-07-09 17:57:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:50,176 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 393 transitions. [2021-07-09 17:57:50,176 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) [2021-07-09 17:57:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 393 transitions. [2021-07-09 17:57:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-07-09 17:57:50,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:50,176 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:50,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:57:50,377 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:50,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1838205113, now seen corresponding path program 25 times [2021-07-09 17:57:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:50,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285939384] [2021-07-09 17:57:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:50,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:50,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285939384] [2021-07-09 17:57:50,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285939384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:50,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857293484] [2021-07-09 17:57:50,528 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 [2021-07-09 17:57:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 17:57:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:50,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857293484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:50,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:50,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:57:50,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596457169] [2021-07-09 17:57:50,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:57:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:50,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:57:50,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:50,662 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) [2021-07-09 17:57:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:50,802 INFO L93 Difference]: Finished difference Result 576 states and 1129 transitions. [2021-07-09 17:57:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:57:50,803 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 [2021-07-09 17:57:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:50,804 INFO L225 Difference]: With dead ends: 576 [2021-07-09 17:57:50,804 INFO L226 Difference]: Without dead ends: 507 [2021-07-09 17:57:50,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:57:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-09 17:57:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 386. [2021-07-09 17:57:50,813 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) [2021-07-09 17:57:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 823 transitions. [2021-07-09 17:57:50,814 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 823 transitions. Word has length 51 [2021-07-09 17:57:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:50,814 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 823 transitions. [2021-07-09 17:57:50,814 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) [2021-07-09 17:57:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 823 transitions. [2021-07-09 17:57:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:57:50,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:50,816 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:51,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 17:57:51,029 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash 987816891, now seen corresponding path program 26 times [2021-07-09 17:57:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:51,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045270494] [2021-07-09 17:57:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:51,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045270494] [2021-07-09 17:57:51,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045270494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387170787] [2021-07-09 17:57:51,303 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 [2021-07-09 17:57:51,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:57:51,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387170787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:51,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:51,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-07-09 17:57:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957760260] [2021-07-09 17:57:51,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-07-09 17:57:51,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-07-09 17:57:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1694, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 17:57:51,935 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) [2021-07-09 17:57:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:57:56,350 INFO L93 Difference]: Finished difference Result 2332 states and 4570 transitions. [2021-07-09 17:57:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-07-09 17:57:56,350 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 [2021-07-09 17:57:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:57:56,355 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 17:57:56,355 INFO L226 Difference]: Without dead ends: 1924 [2021-07-09 17:57:56,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12484 ImplicationChecksByTransitivity, 3992.5ms TimeCoverageRelationStatistics Valid=9089, Invalid=25321, Unknown=0, NotChecked=0, Total=34410 [2021-07-09 17:57:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-07-09 17:57:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 247. [2021-07-09 17:57:56,366 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) [2021-07-09 17:57:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 502 transitions. [2021-07-09 17:57:56,366 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 502 transitions. Word has length 53 [2021-07-09 17:57:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:57:56,366 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 502 transitions. [2021-07-09 17:57:56,367 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) [2021-07-09 17:57:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 502 transitions. [2021-07-09 17:57:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:57:56,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:57:56,367 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:57:56,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:57:56,581 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:57:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:57:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1237739003, now seen corresponding path program 27 times [2021-07-09 17:57:56,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:57:56,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492685604] [2021-07-09 17:57:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:57:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:57:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:56,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:57:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492685604] [2021-07-09 17:57:56,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492685604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:56,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573498068] [2021-07-09 17:57:56,729 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 [2021-07-09 17:57:56,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:57:56,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:57:56,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:57:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:57:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:57:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573498068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:57:57,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:57:57,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-07-09 17:57:57,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636216127] [2021-07-09 17:57:57,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 17:57:57,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:57:57,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 17:57:57,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=994, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:57:57,322 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) [2021-07-09 17:58:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:01,199 INFO L93 Difference]: Finished difference Result 1486 states and 2946 transitions. [2021-07-09 17:58:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-07-09 17:58:01,200 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 [2021-07-09 17:58:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:01,204 INFO L225 Difference]: With dead ends: 1486 [2021-07-09 17:58:01,204 INFO L226 Difference]: Without dead ends: 1482 [2021-07-09 17:58:01,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12394 ImplicationChecksByTransitivity, 3648.6ms TimeCoverageRelationStatistics Valid=7328, Invalid=23824, Unknown=0, NotChecked=0, Total=31152 [2021-07-09 17:58:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-09 17:58:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 211. [2021-07-09 17:58:01,213 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) [2021-07-09 17:58:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 431 transitions. [2021-07-09 17:58:01,213 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 431 transitions. Word has length 53 [2021-07-09 17:58:01,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:01,213 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 431 transitions. [2021-07-09 17:58:01,213 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) [2021-07-09 17:58:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 431 transitions. [2021-07-09 17:58:01,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-07-09 17:58:01,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:01,214 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:01,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:01,431 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash -818551687, now seen corresponding path program 28 times [2021-07-09 17:58:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:01,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353426338] [2021-07-09 17:58:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:01,571 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353426338] [2021-07-09 17:58:01,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353426338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691038192] [2021-07-09 17:58:01,572 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 [2021-07-09 17:58:01,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:01,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 17:58:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:01,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691038192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:01,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:01,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:58:01,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625704785] [2021-07-09 17:58:01,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:58:01,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:01,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:58:01,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:58:01,721 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) [2021-07-09 17:58:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:01,878 INFO L93 Difference]: Finished difference Result 635 states and 1246 transitions. [2021-07-09 17:58:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:58:01,879 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 [2021-07-09 17:58:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:01,881 INFO L225 Difference]: With dead ends: 635 [2021-07-09 17:58:01,881 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 17:58:01,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:58:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 17:58:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 426. [2021-07-09 17:58:01,887 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) [2021-07-09 17:58:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 910 transitions. [2021-07-09 17:58:01,888 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 910 transitions. Word has length 55 [2021-07-09 17:58:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:01,888 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 910 transitions. [2021-07-09 17:58:01,888 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) [2021-07-09 17:58:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 910 transitions. [2021-07-09 17:58:01,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 17:58:01,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:01,889 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:02,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 17:58:02,105 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash -249778565, now seen corresponding path program 29 times [2021-07-09 17:58:02,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:02,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134156823] [2021-07-09 17:58:02,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:02,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134156823] [2021-07-09 17:58:02,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134156823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46949055] [2021-07-09 17:58:02,402 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 [2021-07-09 17:58:02,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:58:02,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:58:02,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46949055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:03,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:03,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-07-09 17:58:03,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770846329] [2021-07-09 17:58:03,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-07-09 17:58:03,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-07-09 17:58:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 17:58:03,051 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) [2021-07-09 17:58:08,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:08,477 INFO L93 Difference]: Finished difference Result 2725 states and 5348 transitions. [2021-07-09 17:58:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-07-09 17:58:08,478 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 [2021-07-09 17:58:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:08,485 INFO L225 Difference]: With dead ends: 2725 [2021-07-09 17:58:08,485 INFO L226 Difference]: Without dead ends: 2239 [2021-07-09 17:58:08,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17392 ImplicationChecksByTransitivity, 4827.3ms TimeCoverageRelationStatistics Valid=12230, Invalid=33780, Unknown=0, NotChecked=0, Total=46010 [2021-07-09 17:58:08,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-07-09 17:58:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 269. [2021-07-09 17:58:08,501 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) [2021-07-09 17:58:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 548 transitions. [2021-07-09 17:58:08,502 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 548 transitions. Word has length 57 [2021-07-09 17:58:08,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:08,502 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 548 transitions. [2021-07-09 17:58:08,502 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) [2021-07-09 17:58:08,502 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 548 transitions. [2021-07-09 17:58:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-07-09 17:58:08,503 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:08,503 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:08,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:58:08,717 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash 969410313, now seen corresponding path program 30 times [2021-07-09 17:58:08,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:08,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37841388] [2021-07-09 17:58:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:08,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37841388] [2021-07-09 17:58:08,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37841388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852753658] [2021-07-09 17:58:08,877 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 [2021-07-09 17:58:08,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:58:08,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:08,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:58:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:09,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852753658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:09,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:09,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 38 [2021-07-09 17:58:09,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412346101] [2021-07-09 17:58:09,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-09 17:58:09,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:09,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-09 17:58:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:58:09,539 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) [2021-07-09 17:58:14,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:14,221 INFO L93 Difference]: Finished difference Result 1752 states and 3478 transitions. [2021-07-09 17:58:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2021-07-09 17:58:14,222 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 [2021-07-09 17:58:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:14,226 INFO L225 Difference]: With dead ends: 1752 [2021-07-09 17:58:14,226 INFO L226 Difference]: Without dead ends: 1748 [2021-07-09 17:58:14,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17239 ImplicationChecksByTransitivity, 4429.8ms TimeCoverageRelationStatistics Valid=9824, Invalid=31996, Unknown=0, NotChecked=0, Total=41820 [2021-07-09 17:58:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-07-09 17:58:14,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 229. [2021-07-09 17:58:14,237 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) [2021-07-09 17:58:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 469 transitions. [2021-07-09 17:58:14,237 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 469 transitions. Word has length 57 [2021-07-09 17:58:14,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:14,237 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 469 transitions. [2021-07-09 17:58:14,238 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) [2021-07-09 17:58:14,238 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 469 transitions. [2021-07-09 17:58:14,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:58:14,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:14,238 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:14,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:58:14,453 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:14,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:14,453 INFO L82 PathProgramCache]: Analyzing trace with hash -441843911, now seen corresponding path program 31 times [2021-07-09 17:58:14,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:14,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324189996] [2021-07-09 17:58:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:14,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:14,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324189996] [2021-07-09 17:58:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324189996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373160151] [2021-07-09 17:58:14,654 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 [2021-07-09 17:58:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 17:58:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373160151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:14,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:14,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:58:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264936129] [2021-07-09 17:58:14,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:58:14,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:58:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:14,802 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) [2021-07-09 17:58:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:14,987 INFO L93 Difference]: Finished difference Result 694 states and 1363 transitions. [2021-07-09 17:58:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:58:14,988 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 [2021-07-09 17:58:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:14,990 INFO L225 Difference]: With dead ends: 694 [2021-07-09 17:58:14,990 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 17:58:14,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:58:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 17:58:14,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 466. [2021-07-09 17:58:14,997 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) [2021-07-09 17:58:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 997 transitions. [2021-07-09 17:58:14,998 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 997 transitions. Word has length 59 [2021-07-09 17:58:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:14,999 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 997 transitions. [2021-07-09 17:58:14,999 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) [2021-07-09 17:58:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 997 transitions. [2021-07-09 17:58:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 17:58:14,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:15,000 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:15,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 17:58:15,201 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1019742149, now seen corresponding path program 32 times [2021-07-09 17:58:15,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:15,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612266716] [2021-07-09 17:58:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:15,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:15,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612266716] [2021-07-09 17:58:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612266716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:15,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670500759] [2021-07-09 17:58:15,669 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 [2021-07-09 17:58:15,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:58:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:16,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670500759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:16,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:16,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-07-09 17:58:16,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056245185] [2021-07-09 17:58:16,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 17:58:16,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:16,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 17:58:16,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:58:16,628 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) [2021-07-09 17:58:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:23,510 INFO L93 Difference]: Finished difference Result 3146 states and 6182 transitions. [2021-07-09 17:58:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-07-09 17:58:23,510 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 [2021-07-09 17:58:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:23,515 INFO L225 Difference]: With dead ends: 3146 [2021-07-09 17:58:23,515 INFO L226 Difference]: Without dead ends: 2576 [2021-07-09 17:58:23,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23637 ImplicationChecksByTransitivity, 6429.0ms TimeCoverageRelationStatistics Valid=16125, Invalid=44145, Unknown=0, NotChecked=0, Total=60270 [2021-07-09 17:58:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-07-09 17:58:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 291. [2021-07-09 17:58:23,532 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) [2021-07-09 17:58:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 594 transitions. [2021-07-09 17:58:23,533 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 594 transitions. Word has length 61 [2021-07-09 17:58:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:23,533 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 594 transitions. [2021-07-09 17:58:23,533 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) [2021-07-09 17:58:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 594 transitions. [2021-07-09 17:58:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-07-09 17:58:23,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:23,534 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:23,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 17:58:23,735 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash -820612595, now seen corresponding path program 33 times [2021-07-09 17:58:23,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:23,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135356821] [2021-07-09 17:58:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:23,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135356821] [2021-07-09 17:58:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135356821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:23,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200161404] [2021-07-09 17:58:23,916 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 [2021-07-09 17:58:23,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:58:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:58:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 133 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:24,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200161404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:24,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:24,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 41 [2021-07-09 17:58:24,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392727122] [2021-07-09 17:58:24,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 17:58:24,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:24,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 17:58:24,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:58:24,608 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) [2021-07-09 17:58:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:30,328 INFO L93 Difference]: Finished difference Result 2040 states and 4054 transitions. [2021-07-09 17:58:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-07-09 17:58:30,328 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 [2021-07-09 17:58:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:30,331 INFO L225 Difference]: With dead ends: 2040 [2021-07-09 17:58:30,331 INFO L226 Difference]: Without dead ends: 2036 [2021-07-09 17:58:30,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23384 ImplicationChecksByTransitivity, 5449.3ms TimeCoverageRelationStatistics Valid=12911, Invalid=42079, Unknown=0, NotChecked=0, Total=54990 [2021-07-09 17:58:30,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-09 17:58:30,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 247. [2021-07-09 17:58:30,341 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) [2021-07-09 17:58:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 507 transitions. [2021-07-09 17:58:30,342 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 507 transitions. Word has length 61 [2021-07-09 17:58:30,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:30,342 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 507 transitions. [2021-07-09 17:58:30,342 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) [2021-07-09 17:58:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 507 transitions. [2021-07-09 17:58:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-09 17:58:30,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:30,343 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:30,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 17:58:30,547 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1642473223, now seen corresponding path program 34 times [2021-07-09 17:58:30,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:30,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871452763] [2021-07-09 17:58:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:30,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871452763] [2021-07-09 17:58:30,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871452763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:30,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199795632] [2021-07-09 17:58:30,716 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 [2021-07-09 17:58:30,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:58:30,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 17:58:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:30,869 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:30,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199795632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:30,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:30,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:58:30,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728611668] [2021-07-09 17:58:30,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:58:30,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:30,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:58:30,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:58:30,871 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) [2021-07-09 17:58:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:31,114 INFO L93 Difference]: Finished difference Result 753 states and 1480 transitions. [2021-07-09 17:58:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:58:31,114 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 [2021-07-09 17:58:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:31,116 INFO L225 Difference]: With dead ends: 753 [2021-07-09 17:58:31,116 INFO L226 Difference]: Without dead ends: 666 [2021-07-09 17:58:31,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:58:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-09 17:58:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 506. [2021-07-09 17:58:31,124 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) [2021-07-09 17:58:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1084 transitions. [2021-07-09 17:58:31,125 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1084 transitions. Word has length 63 [2021-07-09 17:58:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:31,125 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1084 transitions. [2021-07-09 17:58:31,126 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) [2021-07-09 17:58:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1084 transitions. [2021-07-09 17:58:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:58:31,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:31,127 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:31,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:58:31,337 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1574993669, now seen corresponding path program 35 times [2021-07-09 17:58:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078843607] [2021-07-09 17:58:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:31,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:31,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078843607] [2021-07-09 17:58:31,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078843607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:31,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507556968] [2021-07-09 17:58:31,712 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 [2021-07-09 17:58:31,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:58:31,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:58:31,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:32,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507556968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:32,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:32,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 57 [2021-07-09 17:58:32,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911774566] [2021-07-09 17:58:32,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-07-09 17:58:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-07-09 17:58:32,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=2723, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 17:58:32,559 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) [2021-07-09 17:58:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:40,703 INFO L93 Difference]: Finished difference Result 3595 states and 7072 transitions. [2021-07-09 17:58:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-07-09 17:58:40,703 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 [2021-07-09 17:58:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:40,708 INFO L225 Difference]: With dead ends: 3595 [2021-07-09 17:58:40,708 INFO L226 Difference]: Without dead ends: 2935 [2021-07-09 17:58:40,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31446 ImplicationChecksByTransitivity, 7235.6ms TimeCoverageRelationStatistics Valid=20887, Invalid=56675, Unknown=0, NotChecked=0, Total=77562 [2021-07-09 17:58:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-07-09 17:58:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 313. [2021-07-09 17:58:40,726 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) [2021-07-09 17:58:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 640 transitions. [2021-07-09 17:58:40,727 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 640 transitions. Word has length 65 [2021-07-09 17:58:40,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:40,727 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 640 transitions. [2021-07-09 17:58:40,727 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) [2021-07-09 17:58:40,727 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 640 transitions. [2021-07-09 17:58:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:58:40,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:40,728 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:40,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:58:40,933 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:40,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:40,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1894636305, now seen corresponding path program 36 times [2021-07-09 17:58:40,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:40,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967895851] [2021-07-09 17:58:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:41,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967895851] [2021-07-09 17:58:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967895851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723965779] [2021-07-09 17:58:41,132 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 [2021-07-09 17:58:41,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:58:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:58:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 157 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:41,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723965779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:41,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:41,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2021-07-09 17:58:41,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604283929] [2021-07-09 17:58:41,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-07-09 17:58:41,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:41,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-07-09 17:58:41,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:58:41,874 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) [2021-07-09 17:58:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:48,760 INFO L93 Difference]: Finished difference Result 2350 states and 4674 transitions. [2021-07-09 17:58:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-07-09 17:58:48,760 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 [2021-07-09 17:58:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:48,764 INFO L225 Difference]: With dead ends: 2350 [2021-07-09 17:58:48,764 INFO L226 Difference]: Without dead ends: 2346 [2021-07-09 17:58:48,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31044 ImplicationChecksByTransitivity, 6503.1ms TimeCoverageRelationStatistics Valid=16676, Invalid=54346, Unknown=0, NotChecked=0, Total=71022 [2021-07-09 17:58:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-09 17:58:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 265. [2021-07-09 17:58:48,784 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) [2021-07-09 17:58:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 545 transitions. [2021-07-09 17:58:48,785 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 545 transitions. Word has length 65 [2021-07-09 17:58:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:48,785 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 545 transitions. [2021-07-09 17:58:48,785 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) [2021-07-09 17:58:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 545 transitions. [2021-07-09 17:58:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-07-09 17:58:48,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:48,786 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:49,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:58:49,001 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1631728057, now seen corresponding path program 37 times [2021-07-09 17:58:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:49,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330655119] [2021-07-09 17:58:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:49,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330655119] [2021-07-09 17:58:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330655119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142385432] [2021-07-09 17:58:49,175 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 [2021-07-09 17:58:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 55 conjunts are in the unsatisfiable core [2021-07-09 17:58:49,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:49,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142385432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:49,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:49,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-09 17:58:49,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543353854] [2021-07-09 17:58:49,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:58:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:58:49,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:58:49,332 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) [2021-07-09 17:58:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:58:49,579 INFO L93 Difference]: Finished difference Result 812 states and 1597 transitions. [2021-07-09 17:58:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:58:49,579 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 [2021-07-09 17:58:49,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:58:49,581 INFO L225 Difference]: With dead ends: 812 [2021-07-09 17:58:49,581 INFO L226 Difference]: Without dead ends: 719 [2021-07-09 17:58:49,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:58:49,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-07-09 17:58:49,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 546. [2021-07-09 17:58:49,588 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) [2021-07-09 17:58:49,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 1171 transitions. [2021-07-09 17:58:49,590 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 1171 transitions. Word has length 67 [2021-07-09 17:58:49,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:58:49,590 INFO L482 AbstractCegarLoop]: Abstraction has 546 states and 1171 transitions. [2021-07-09 17:58:49,590 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) [2021-07-09 17:58:49,590 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 1171 transitions. [2021-07-09 17:58:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 17:58:49,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:58:49,591 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:58:49,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:58:49,801 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:58:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:58:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 441452731, now seen corresponding path program 38 times [2021-07-09 17:58:49,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:58:49,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034981620] [2021-07-09 17:58:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:58:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:58:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:50,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:58:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034981620] [2021-07-09 17:58:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034981620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600894055] [2021-07-09 17:58:50,232 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 [2021-07-09 17:58:50,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:58:50,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:58:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:58:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:58:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:58:51,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600894055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:58:51,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:58:51,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-07-09 17:58:51,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462026457] [2021-07-09 17:58:51,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-07-09 17:58:51,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:58:51,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-07-09 17:58:51,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=3120, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 17:58:51,089 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) [2021-07-09 17:59:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:00,873 INFO L93 Difference]: Finished difference Result 4072 states and 8018 transitions. [2021-07-09 17:59:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 256 states. [2021-07-09 17:59:00,873 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 [2021-07-09 17:59:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:00,881 INFO L225 Difference]: With dead ends: 4072 [2021-07-09 17:59:00,881 INFO L226 Difference]: Without dead ends: 3316 [2021-07-09 17:59:00,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41063 ImplicationChecksByTransitivity, 8582.6ms TimeCoverageRelationStatistics Valid=26637, Invalid=71645, Unknown=0, NotChecked=0, Total=98282 [2021-07-09 17:59:00,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-07-09 17:59:00,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 335. [2021-07-09 17:59:00,910 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) [2021-07-09 17:59:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 686 transitions. [2021-07-09 17:59:00,911 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 686 transitions. Word has length 69 [2021-07-09 17:59:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:00,911 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 686 transitions. [2021-07-09 17:59:00,911 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) [2021-07-09 17:59:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 686 transitions. [2021-07-09 17:59:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-07-09 17:59:00,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:00,912 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:01,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:01,125 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1349041643, now seen corresponding path program 39 times [2021-07-09 17:59:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:01,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296961036] [2021-07-09 17:59:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:01,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296961036] [2021-07-09 17:59:01,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296961036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:01,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507948299] [2021-07-09 17:59:01,344 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 [2021-07-09 17:59:01,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-09 17:59:01,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:59:01,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 183 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507948299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:02,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:02,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 47 [2021-07-09 17:59:02,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308119045] [2021-07-09 17:59:02,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-07-09 17:59:02,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:02,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-07-09 17:59:02,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1804, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:59:02,221 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) [2021-07-09 17:59:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:10,272 INFO L93 Difference]: Finished difference Result 2682 states and 5338 transitions. [2021-07-09 17:59:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-09 17:59:10,272 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 [2021-07-09 17:59:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:10,276 INFO L225 Difference]: With dead ends: 2682 [2021-07-09 17:59:10,276 INFO L226 Difference]: Without dead ends: 2678 [2021-07-09 17:59:10,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 7594.9ms TimeCoverageRelationStatistics Valid=21212, Invalid=69088, Unknown=0, NotChecked=0, Total=90300 [2021-07-09 17:59:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2021-07-09 17:59:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 283. [2021-07-09 17:59:10,296 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) [2021-07-09 17:59:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 583 transitions. [2021-07-09 17:59:10,297 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 583 transitions. Word has length 69 [2021-07-09 17:59:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:10,297 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 583 transitions. [2021-07-09 17:59:10,297 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) [2021-07-09 17:59:10,297 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 583 transitions. [2021-07-09 17:59:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-07-09 17:59:10,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:10,298 INFO L508 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:10,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:10,522 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1888499335, now seen corresponding path program 40 times [2021-07-09 17:59:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406130809] [2021-07-09 17:59:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:10,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406130809] [2021-07-09 17:59:10,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406130809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:10,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310812496] [2021-07-09 17:59:10,796 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 [2021-07-09 17:59:10,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:59:10,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 17:59:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:10,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310812496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:10,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:10,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:59:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539895749] [2021-07-09 17:59:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:59:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:59:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:59:10,956 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) [2021-07-09 17:59:11,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:11,235 INFO L93 Difference]: Finished difference Result 871 states and 1714 transitions. [2021-07-09 17:59:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:59:11,235 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 [2021-07-09 17:59:11,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:11,237 INFO L225 Difference]: With dead ends: 871 [2021-07-09 17:59:11,237 INFO L226 Difference]: Without dead ends: 772 [2021-07-09 17:59:11,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:59:11,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-07-09 17:59:11,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 586. [2021-07-09 17:59:11,244 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) [2021-07-09 17:59:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1258 transitions. [2021-07-09 17:59:11,246 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1258 transitions. Word has length 71 [2021-07-09 17:59:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:11,246 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1258 transitions. [2021-07-09 17:59:11,246 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) [2021-07-09 17:59:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1258 transitions. [2021-07-09 17:59:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-09 17:59:11,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:11,247 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:11,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 17:59:11,453 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:11,453 INFO L82 PathProgramCache]: Analyzing trace with hash -808038533, now seen corresponding path program 41 times [2021-07-09 17:59:11,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:11,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522598850] [2021-07-09 17:59:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:11,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:11,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:11,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522598850] [2021-07-09 17:59:11,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522598850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:11,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640835855] [2021-07-09 17:59:11,924 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 [2021-07-09 17:59:11,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 17:59:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:11,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:11,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:12,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640835855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:12,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:12,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 65 [2021-07-09 17:59:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370634492] [2021-07-09 17:59:12,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-09 17:59:12,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-09 17:59:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=3544, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 17:59:12,873 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) [2021-07-09 17:59:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:24,600 INFO L93 Difference]: Finished difference Result 4577 states and 9020 transitions. [2021-07-09 17:59:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2021-07-09 17:59:24,600 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 [2021-07-09 17:59:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:24,605 INFO L225 Difference]: With dead ends: 4577 [2021-07-09 17:59:24,605 INFO L226 Difference]: Without dead ends: 3719 [2021-07-09 17:59:24,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52751 ImplicationChecksByTransitivity, 10101.6ms TimeCoverageRelationStatistics Valid=33504, Invalid=89346, Unknown=0, NotChecked=0, Total=122850 [2021-07-09 17:59:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-07-09 17:59:24,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 357. [2021-07-09 17:59:24,624 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) [2021-07-09 17:59:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 732 transitions. [2021-07-09 17:59:24,625 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 732 transitions. Word has length 73 [2021-07-09 17:59:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:24,625 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 732 transitions. [2021-07-09 17:59:24,625 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) [2021-07-09 17:59:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 732 transitions. [2021-07-09 17:59:24,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-07-09 17:59:24,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:24,626 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:24,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:24,850 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:24,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:24,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1893443353, now seen corresponding path program 42 times [2021-07-09 17:59:24,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:24,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379101997] [2021-07-09 17:59:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:25,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:25,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379101997] [2021-07-09 17:59:25,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379101997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:25,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262051206] [2021-07-09 17:59:25,076 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 [2021-07-09 17:59:25,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-09 17:59:25,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:25,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:59:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 211 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:26,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262051206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:26,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:26,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 50 [2021-07-09 17:59:26,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95257146] [2021-07-09 17:59:26,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-07-09 17:59:26,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-07-09 17:59:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2044, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:59:26,085 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) [2021-07-09 17:59:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:35,641 INFO L93 Difference]: Finished difference Result 3036 states and 6046 transitions. [2021-07-09 17:59:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-07-09 17:59:35,641 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 [2021-07-09 17:59:35,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:35,644 INFO L225 Difference]: With dead ends: 3036 [2021-07-09 17:59:35,644 INFO L226 Difference]: Without dead ends: 3032 [2021-07-09 17:59:35,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51850 ImplicationChecksByTransitivity, 9055.1ms TimeCoverageRelationStatistics Valid=26618, Invalid=86614, Unknown=0, NotChecked=0, Total=113232 [2021-07-09 17:59:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-07-09 17:59:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 301. [2021-07-09 17:59:35,663 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) [2021-07-09 17:59:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 621 transitions. [2021-07-09 17:59:35,663 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 621 transitions. Word has length 73 [2021-07-09 17:59:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:35,663 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 621 transitions. [2021-07-09 17:59:35,664 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) [2021-07-09 17:59:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 621 transitions. [2021-07-09 17:59:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-07-09 17:59:35,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:35,665 INFO L508 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:35,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:59:35,881 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash -58761159, now seen corresponding path program 43 times [2021-07-09 17:59:35,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:35,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946167758] [2021-07-09 17:59:35,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:36,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946167758] [2021-07-09 17:59:36,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946167758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961497873] [2021-07-09 17:59:36,102 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 [2021-07-09 17:59:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:36,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 63 conjunts are in the unsatisfiable core [2021-07-09 17:59:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:36,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961497873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:36,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:36,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-09 17:59:36,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4934783] [2021-07-09 17:59:36,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:59:36,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:59:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:59:36,257 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) [2021-07-09 17:59:36,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:36,578 INFO L93 Difference]: Finished difference Result 930 states and 1831 transitions. [2021-07-09 17:59:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:59:36,578 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 [2021-07-09 17:59:36,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:36,580 INFO L225 Difference]: With dead ends: 930 [2021-07-09 17:59:36,580 INFO L226 Difference]: Without dead ends: 825 [2021-07-09 17:59:36,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.6ms TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:59:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-07-09 17:59:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 626. [2021-07-09 17:59:36,588 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) [2021-07-09 17:59:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1345 transitions. [2021-07-09 17:59:36,589 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1345 transitions. Word has length 75 [2021-07-09 17:59:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:36,589 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 1345 transitions. [2021-07-09 17:59:36,589 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) [2021-07-09 17:59:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1345 transitions. [2021-07-09 17:59:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-09 17:59:36,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:36,591 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:36,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 17:59:36,812 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -95480517, now seen corresponding path program 44 times [2021-07-09 17:59:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:36,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990749173] [2021-07-09 17:59:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:37,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:37,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990749173] [2021-07-09 17:59:37,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990749173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:37,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063332716] [2021-07-09 17:59:37,334 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 [2021-07-09 17:59:37,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:59:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:59:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 225 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:38,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063332716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:38,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:38,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 69 [2021-07-09 17:59:38,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118839928] [2021-07-09 17:59:38,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-07-09 17:59:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-07-09 17:59:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=3995, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 17:59:38,445 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) [2021-07-09 17:59:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:59:52,235 INFO L93 Difference]: Finished difference Result 5110 states and 10078 transitions. [2021-07-09 17:59:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 324 states. [2021-07-09 17:59:52,235 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 [2021-07-09 17:59:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:59:52,240 INFO L225 Difference]: With dead ends: 5110 [2021-07-09 17:59:52,240 INFO L226 Difference]: Without dead ends: 4144 [2021-07-09 17:59:52,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66790 ImplicationChecksByTransitivity, 11891.2ms TimeCoverageRelationStatistics Valid=41625, Invalid=110085, Unknown=0, NotChecked=0, Total=151710 [2021-07-09 17:59:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-07-09 17:59:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 379. [2021-07-09 17:59:52,262 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) [2021-07-09 17:59:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 778 transitions. [2021-07-09 17:59:52,263 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 778 transitions. Word has length 77 [2021-07-09 17:59:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:59:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 778 transitions. [2021-07-09 17:59:52,263 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) [2021-07-09 17:59:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 778 transitions. [2021-07-09 17:59:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-07-09 17:59:52,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:59:52,264 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:59:52,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:59:52,467 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:59:52,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:59:52,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1341912547, now seen corresponding path program 45 times [2021-07-09 17:59:52,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:59:52,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117462078] [2021-07-09 17:59:52,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:59:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:59:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:52,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:59:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117462078] [2021-07-09 17:59:52,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117462078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:52,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498644063] [2021-07-09 17:59:52,735 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 [2021-07-09 17:59:52,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-07-09 17:59:52,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:59:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:59:52,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:59:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 241 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:59:53,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498644063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:59:53,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:59:53,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35] total 53 [2021-07-09 17:59:53,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392298725] [2021-07-09 17:59:53,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-07-09 17:59:53,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:59:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-07-09 17:59:53,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=2299, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 17:59:53,723 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) [2021-07-09 18:00:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:05,116 INFO L93 Difference]: Finished difference Result 3412 states and 6798 transitions. [2021-07-09 18:00:05,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 325 states. [2021-07-09 18:00:05,117 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 [2021-07-09 18:00:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:05,120 INFO L225 Difference]: With dead ends: 3412 [2021-07-09 18:00:05,120 INFO L226 Difference]: Without dead ends: 3408 [2021-07-09 18:00:05,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65508 ImplicationChecksByTransitivity, 10572.6ms TimeCoverageRelationStatistics Valid=32999, Invalid=107251, Unknown=0, NotChecked=0, Total=140250 [2021-07-09 18:00:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-07-09 18:00:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 319. [2021-07-09 18:00:05,141 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) [2021-07-09 18:00:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 659 transitions. [2021-07-09 18:00:05,142 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 659 transitions. Word has length 77 [2021-07-09 18:00:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:05,142 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 659 transitions. [2021-07-09 18:00:05,142 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) [2021-07-09 18:00:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 659 transitions. [2021-07-09 18:00:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-07-09 18:00:05,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:05,143 INFO L508 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:05,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:00:05,343 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1809692153, now seen corresponding path program 46 times [2021-07-09 18:00:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:05,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736282588] [2021-07-09 18:00:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:05,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736282588] [2021-07-09 18:00:05,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736282588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:05,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985552307] [2021-07-09 18:00:05,600 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 [2021-07-09 18:00:05,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:00:05,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:05,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:00:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985552307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:05,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:05,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-07-09 18:00:05,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836855027] [2021-07-09 18:00:05,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:00:05,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:05,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:00:05,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:05,749 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) [2021-07-09 18:00:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:06,103 INFO L93 Difference]: Finished difference Result 989 states and 1948 transitions. [2021-07-09 18:00:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:00:06,104 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 [2021-07-09 18:00:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:06,105 INFO L225 Difference]: With dead ends: 989 [2021-07-09 18:00:06,105 INFO L226 Difference]: Without dead ends: 878 [2021-07-09 18:00:06,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:00:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-07-09 18:00:06,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 666. [2021-07-09 18:00:06,111 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) [2021-07-09 18:00:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 1432 transitions. [2021-07-09 18:00:06,112 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 1432 transitions. Word has length 79 [2021-07-09 18:00:06,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:06,112 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 1432 transitions. [2021-07-09 18:00:06,112 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) [2021-07-09 18:00:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 1432 transitions. [2021-07-09 18:00:06,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-09 18:00:06,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:06,114 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:06,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:06,317 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:06,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:06,318 INFO L82 PathProgramCache]: Analyzing trace with hash -521725445, now seen corresponding path program 47 times [2021-07-09 18:00:06,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:06,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027688744] [2021-07-09 18:00:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:06,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027688744] [2021-07-09 18:00:06,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027688744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221803501] [2021-07-09 18:00:06,875 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 [2021-07-09 18:00:06,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-09 18:00:06,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:06,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:00:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 256 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:08,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221803501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:08,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:08,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2021-07-09 18:00:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932672301] [2021-07-09 18:00:08,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-07-09 18:00:08,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-07-09 18:00:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=4473, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:00:08,031 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) [2021-07-09 18:00:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:25,235 INFO L93 Difference]: Finished difference Result 5671 states and 11192 transitions. [2021-07-09 18:00:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 361 states. [2021-07-09 18:00:25,236 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 [2021-07-09 18:00:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:25,241 INFO L225 Difference]: With dead ends: 5671 [2021-07-09 18:00:25,241 INFO L226 Difference]: Without dead ends: 4591 [2021-07-09 18:00:25,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83479 ImplicationChecksByTransitivity, 14349.7ms TimeCoverageRelationStatistics Valid=51145, Invalid=134185, Unknown=0, NotChecked=0, Total=185330 [2021-07-09 18:00:25,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-07-09 18:00:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 401. [2021-07-09 18:00:25,264 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) [2021-07-09 18:00:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 824 transitions. [2021-07-09 18:00:25,265 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 824 transitions. Word has length 81 [2021-07-09 18:00:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:25,265 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 824 transitions. [2021-07-09 18:00:25,265 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) [2021-07-09 18:00:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 824 transitions. [2021-07-09 18:00:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-07-09 18:00:25,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:25,266 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:25,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:00:25,467 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1037658913, now seen corresponding path program 48 times [2021-07-09 18:00:25,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:25,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090930116] [2021-07-09 18:00:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:25,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090930116] [2021-07-09 18:00:25,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090930116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:25,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521553185] [2021-07-09 18:00:25,762 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 [2021-07-09 18:00:25,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-07-09 18:00:25,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:25,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 18:00:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 273 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:26,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521553185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:26,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:26,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 37] total 56 [2021-07-09 18:00:26,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957527417] [2021-07-09 18:00:26,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-07-09 18:00:26,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:26,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-07-09 18:00:26,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=2569, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:00:26,837 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) [2021-07-09 18:00:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:40,067 INFO L93 Difference]: Finished difference Result 3810 states and 7594 transitions. [2021-07-09 18:00:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 362 states. [2021-07-09 18:00:40,067 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 [2021-07-09 18:00:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:40,072 INFO L225 Difference]: With dead ends: 3810 [2021-07-09 18:00:40,072 INFO L226 Difference]: Without dead ends: 3806 [2021-07-09 18:00:40,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81705 ImplicationChecksByTransitivity, 12234.5ms TimeCoverageRelationStatistics Valid=40466, Invalid=131344, Unknown=0, NotChecked=0, Total=171810 [2021-07-09 18:00:40,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-07-09 18:00:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 337. [2021-07-09 18:00:40,095 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) [2021-07-09 18:00:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 697 transitions. [2021-07-09 18:00:40,096 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 697 transitions. Word has length 81 [2021-07-09 18:00:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:40,096 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 697 transitions. [2021-07-09 18:00:40,096 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) [2021-07-09 18:00:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 697 transitions. [2021-07-09 18:00:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-07-09 18:00:40,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:40,097 INFO L508 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:40,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:40,298 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:40,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:40,298 INFO L82 PathProgramCache]: Analyzing trace with hash 210209465, now seen corresponding path program 49 times [2021-07-09 18:00:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:40,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605710116] [2021-07-09 18:00:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605710116] [2021-07-09 18:00:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605710116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149194385] [2021-07-09 18:00:40,575 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 [2021-07-09 18:00:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-09 18:00:40,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:40,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149194385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:40,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:40,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-07-09 18:00:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389040565] [2021-07-09 18:00:40,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:00:40,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:00:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:40,750 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) [2021-07-09 18:00:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:00:41,168 INFO L93 Difference]: Finished difference Result 1048 states and 2065 transitions. [2021-07-09 18:00:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:00:41,168 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 [2021-07-09 18:00:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:00:41,170 INFO L225 Difference]: With dead ends: 1048 [2021-07-09 18:00:41,170 INFO L226 Difference]: Without dead ends: 931 [2021-07-09 18:00:41,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:00:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-07-09 18:00:41,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 706. [2021-07-09 18:00:41,178 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) [2021-07-09 18:00:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1519 transitions. [2021-07-09 18:00:41,178 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1519 transitions. Word has length 83 [2021-07-09 18:00:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:00:41,179 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 1519 transitions. [2021-07-09 18:00:41,179 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) [2021-07-09 18:00:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1519 transitions. [2021-07-09 18:00:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-09 18:00:41,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:00:41,180 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:00:41,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:00:41,402 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:00:41,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:00:41,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1448811963, now seen corresponding path program 50 times [2021-07-09 18:00:41,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:00:41,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750454072] [2021-07-09 18:00:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:00:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:00:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:42,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:00:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750454072] [2021-07-09 18:00:42,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750454072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:42,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971878175] [2021-07-09 18:00:42,024 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 [2021-07-09 18:00:42,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:00:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:00:42,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:00:42,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:00:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 289 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:00:43,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971878175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:00:43,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:00:43,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2021-07-09 18:00:43,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333649891] [2021-07-09 18:00:43,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-09 18:00:43,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:00:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-09 18:00:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1028, Invalid=4978, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:00:43,340 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) [2021-07-09 18:01:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:02,866 INFO L93 Difference]: Finished difference Result 6260 states and 12362 transitions. [2021-07-09 18:01:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 400 states. [2021-07-09 18:01:02,867 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 [2021-07-09 18:01:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:02,873 INFO L225 Difference]: With dead ends: 6260 [2021-07-09 18:01:02,873 INFO L226 Difference]: Without dead ends: 5060 [2021-07-09 18:01:02,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103134 ImplicationChecksByTransitivity, 16176.1ms TimeCoverageRelationStatistics Valid=62217, Invalid=161985, Unknown=0, NotChecked=0, Total=224202 [2021-07-09 18:01:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5060 states. [2021-07-09 18:01:02,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5060 to 423. [2021-07-09 18:01:02,904 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) [2021-07-09 18:01:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 870 transitions. [2021-07-09 18:01:02,905 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 870 transitions. Word has length 85 [2021-07-09 18:01:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:02,905 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 870 transitions. [2021-07-09 18:01:02,905 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) [2021-07-09 18:01:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 870 transitions. [2021-07-09 18:01:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-09 18:01:02,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:02,906 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:03,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:01:03,129 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -2136683995, now seen corresponding path program 51 times [2021-07-09 18:01:03,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:03,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089724663] [2021-07-09 18:01:03,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:03,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:03,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:03,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089724663] [2021-07-09 18:01:03,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089724663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:03,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145271441] [2021-07-09 18:01:03,444 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 [2021-07-09 18:01:03,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-07-09 18:01:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:03,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:01:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 307 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:04,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145271441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:04,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:04,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 39] total 59 [2021-07-09 18:01:04,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794250496] [2021-07-09 18:01:04,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-07-09 18:01:04,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:04,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-07-09 18:01:04,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=2854, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:01:04,679 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) [2021-07-09 18:01:19,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:19,860 INFO L93 Difference]: Finished difference Result 4230 states and 8434 transitions. [2021-07-09 18:01:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 401 states. [2021-07-09 18:01:19,861 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 [2021-07-09 18:01:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:19,866 INFO L225 Difference]: With dead ends: 4230 [2021-07-09 18:01:19,866 INFO L226 Difference]: Without dead ends: 4226 [2021-07-09 18:01:19,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 455 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100738 ImplicationChecksByTransitivity, 14032.9ms TimeCoverageRelationStatistics Valid=49136, Invalid=159256, Unknown=0, NotChecked=0, Total=208392 [2021-07-09 18:01:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-07-09 18:01:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 355. [2021-07-09 18:01:19,889 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) [2021-07-09 18:01:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 735 transitions. [2021-07-09 18:01:19,889 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 735 transitions. Word has length 85 [2021-07-09 18:01:19,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:19,889 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 735 transitions. [2021-07-09 18:01:19,889 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) [2021-07-09 18:01:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 735 transitions. [2021-07-09 18:01:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-09 18:01:19,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:19,890 INFO L508 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:20,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:20,097 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:20,097 INFO L82 PathProgramCache]: Analyzing trace with hash -183918983, now seen corresponding path program 52 times [2021-07-09 18:01:20,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:20,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777057169] [2021-07-09 18:01:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:20,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777057169] [2021-07-09 18:01:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777057169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372911607] [2021-07-09 18:01:20,403 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 [2021-07-09 18:01:20,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:01:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372911607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:20,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:20,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-07-09 18:01:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167730985] [2021-07-09 18:01:20,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:01:20,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:01:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:20,578 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) [2021-07-09 18:01:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:21,017 INFO L93 Difference]: Finished difference Result 1107 states and 2182 transitions. [2021-07-09 18:01:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:01:21,017 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 [2021-07-09 18:01:21,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:21,019 INFO L225 Difference]: With dead ends: 1107 [2021-07-09 18:01:21,019 INFO L226 Difference]: Without dead ends: 984 [2021-07-09 18:01:21,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:21,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-07-09 18:01:21,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 746. [2021-07-09 18:01:21,025 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) [2021-07-09 18:01:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1606 transitions. [2021-07-09 18:01:21,027 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1606 transitions. Word has length 87 [2021-07-09 18:01:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:21,027 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1606 transitions. [2021-07-09 18:01:21,027 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) [2021-07-09 18:01:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1606 transitions. [2021-07-09 18:01:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-09 18:01:21,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:21,028 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:21,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:01:21,231 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:21,231 INFO L82 PathProgramCache]: Analyzing trace with hash 888660091, now seen corresponding path program 53 times [2021-07-09 18:01:21,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:21,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605596677] [2021-07-09 18:01:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:21,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:21,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605596677] [2021-07-09 18:01:21,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605596677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:21,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409468900] [2021-07-09 18:01:21,878 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 [2021-07-09 18:01:21,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-07-09 18:01:21,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 324 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:23,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409468900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:23,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:23,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 81 [2021-07-09 18:01:23,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711460439] [2021-07-09 18:01:23,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-07-09 18:01:23,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-07-09 18:01:23,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=5510, Unknown=0, NotChecked=0, Total=6642 [2021-07-09 18:01:23,309 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) [2021-07-09 18:01:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:46,512 INFO L93 Difference]: Finished difference Result 6877 states and 13588 transitions. [2021-07-09 18:01:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 441 states. [2021-07-09 18:01:46,513 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 [2021-07-09 18:01:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:46,522 INFO L225 Difference]: With dead ends: 6877 [2021-07-09 18:01:46,523 INFO L226 Difference]: Without dead ends: 5551 [2021-07-09 18:01:46,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126090 ImplicationChecksByTransitivity, 18912.8ms TimeCoverageRelationStatistics Valid=75002, Invalid=193840, Unknown=0, NotChecked=0, Total=268842 [2021-07-09 18:01:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-07-09 18:01:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 445. [2021-07-09 18:01:46,567 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) [2021-07-09 18:01:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 916 transitions. [2021-07-09 18:01:46,567 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 916 transitions. Word has length 89 [2021-07-09 18:01:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:46,568 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 916 transitions. [2021-07-09 18:01:46,568 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) [2021-07-09 18:01:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 916 transitions. [2021-07-09 18:01:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-09 18:01:46,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:46,569 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:46,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:01:46,789 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 875505449, now seen corresponding path program 54 times [2021-07-09 18:01:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:46,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635004777] [2021-07-09 18:01:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635004777] [2021-07-09 18:01:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635004777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:47,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933016215] [2021-07-09 18:01:47,112 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 [2021-07-09 18:01:47,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-07-09 18:01:47,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:47,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:01:47,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 343 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:48,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933016215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:48,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-07-09 18:01:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216466202] [2021-07-09 18:01:48,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-07-09 18:01:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-07-09 18:01:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=3154, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:01:48,471 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) [2021-07-09 18:02:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:05,984 INFO L93 Difference]: Finished difference Result 4672 states and 9318 transitions. [2021-07-09 18:02:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2021-07-09 18:02:05,984 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 [2021-07-09 18:02:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:05,989 INFO L225 Difference]: With dead ends: 4672 [2021-07-09 18:02:05,990 INFO L226 Difference]: Without dead ends: 4668 [2021-07-09 18:02:06,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 499 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122921 ImplicationChecksByTransitivity, 16029.8ms TimeCoverageRelationStatistics Valid=59132, Invalid=191368, Unknown=0, NotChecked=0, Total=250500 [2021-07-09 18:02:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-07-09 18:02:06,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 373. [2021-07-09 18:02:06,023 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) [2021-07-09 18:02:06,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 773 transitions. [2021-07-09 18:02:06,023 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 773 transitions. Word has length 89 [2021-07-09 18:02:06,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:06,024 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 773 transitions. [2021-07-09 18:02:06,024 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) [2021-07-09 18:02:06,024 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 773 transitions. [2021-07-09 18:02:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-07-09 18:02:06,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:06,025 INFO L508 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:06,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:06,249 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1618955975, now seen corresponding path program 55 times [2021-07-09 18:02:06,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:06,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826511947] [2021-07-09 18:02:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826511947] [2021-07-09 18:02:06,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826511947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179230369] [2021-07-09 18:02:06,590 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 [2021-07-09 18:02:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjunts are in the unsatisfiable core [2021-07-09 18:02:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179230369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:06,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-07-09 18:02:06,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646394644] [2021-07-09 18:02:06,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:02:06,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:06,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:02:06,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:06,789 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) [2021-07-09 18:02:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:07,292 INFO L93 Difference]: Finished difference Result 1166 states and 2299 transitions. [2021-07-09 18:02:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:02:07,292 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 [2021-07-09 18:02:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:07,293 INFO L225 Difference]: With dead ends: 1166 [2021-07-09 18:02:07,294 INFO L226 Difference]: Without dead ends: 1037 [2021-07-09 18:02:07,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:02:07,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-07-09 18:02:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 786. [2021-07-09 18:02:07,301 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) [2021-07-09 18:02:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1693 transitions. [2021-07-09 18:02:07,302 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1693 transitions. Word has length 91 [2021-07-09 18:02:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:07,302 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1693 transitions. [2021-07-09 18:02:07,302 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) [2021-07-09 18:02:07,302 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1693 transitions. [2021-07-09 18:02:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-09 18:02:07,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:07,303 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:07,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:02:07,505 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:07,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash -627432901, now seen corresponding path program 56 times [2021-07-09 18:02:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:07,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428795101] [2021-07-09 18:02:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:08,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428795101] [2021-07-09 18:02:08,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428795101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198645880] [2021-07-09 18:02:08,269 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 [2021-07-09 18:02:08,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:08,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:02:08,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 361 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198645880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:09,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2021-07-09 18:02:09,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968692765] [2021-07-09 18:02:09,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-07-09 18:02:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-07-09 18:02:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1241, Invalid=6069, Unknown=0, NotChecked=0, Total=7310 [2021-07-09 18:02:09,781 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) [2021-07-09 18:02:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:36,074 INFO L93 Difference]: Finished difference Result 7522 states and 14870 transitions. [2021-07-09 18:02:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-07-09 18:02:36,074 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 [2021-07-09 18:02:36,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:36,081 INFO L225 Difference]: With dead ends: 7522 [2021-07-09 18:02:36,081 INFO L226 Difference]: Without dead ends: 6064 [2021-07-09 18:02:36,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152699 ImplicationChecksByTransitivity, 21296.4ms TimeCoverageRelationStatistics Valid=89669, Invalid=230121, Unknown=0, NotChecked=0, Total=319790 [2021-07-09 18:02:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6064 states. [2021-07-09 18:02:36,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6064 to 467. [2021-07-09 18:02:36,123 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) [2021-07-09 18:02:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 962 transitions. [2021-07-09 18:02:36,123 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 962 transitions. Word has length 93 [2021-07-09 18:02:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:36,123 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 962 transitions. [2021-07-09 18:02:36,124 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) [2021-07-09 18:02:36,124 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 962 transitions. [2021-07-09 18:02:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-07-09 18:02:36,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:36,125 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:36,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:36,341 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:36,341 INFO L82 PathProgramCache]: Analyzing trace with hash 700547629, now seen corresponding path program 57 times [2021-07-09 18:02:36,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:36,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353862019] [2021-07-09 18:02:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:36,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353862019] [2021-07-09 18:02:36,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353862019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:36,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099044088] [2021-07-09 18:02:36,674 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 [2021-07-09 18:02:36,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-07-09 18:02:36,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:02:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 381 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:38,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099044088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:38,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:38,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 43] total 65 [2021-07-09 18:02:38,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190842054] [2021-07-09 18:02:38,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-07-09 18:02:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-07-09 18:02:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=3469, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:02:38,077 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) [2021-07-09 18:02:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:58,159 INFO L93 Difference]: Finished difference Result 5136 states and 10246 transitions. [2021-07-09 18:02:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2021-07-09 18:02:58,160 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 [2021-07-09 18:02:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:58,165 INFO L225 Difference]: With dead ends: 5136 [2021-07-09 18:02:58,165 INFO L226 Difference]: Without dead ends: 5132 [2021-07-09 18:02:58,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 545 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148584 ImplicationChecksByTransitivity, 18200.7ms TimeCoverageRelationStatistics Valid=70583, Invalid=228079, Unknown=0, NotChecked=0, Total=298662 [2021-07-09 18:02:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-07-09 18:02:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 391. [2021-07-09 18:02:58,194 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) [2021-07-09 18:02:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 811 transitions. [2021-07-09 18:02:58,195 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 811 transitions. Word has length 93 [2021-07-09 18:02:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:58,195 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 811 transitions. [2021-07-09 18:02:58,195 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) [2021-07-09 18:02:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 811 transitions. [2021-07-09 18:02:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-07-09 18:02:58,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:58,196 INFO L508 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:58,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:02:58,396 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:58,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:58,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1704559353, now seen corresponding path program 58 times [2021-07-09 18:02:58,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:58,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75787135] [2021-07-09 18:02:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75787135] [2021-07-09 18:02:58,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75787135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627313483] [2021-07-09 18:02:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:02:58,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-07-09 18:02:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627313483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:58,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-07-09 18:02:58,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202092897] [2021-07-09 18:02:58,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:02:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:02:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:58,967 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) [2021-07-09 18:02:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:59,591 INFO L93 Difference]: Finished difference Result 1225 states and 2416 transitions. [2021-07-09 18:02:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:02:59,592 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 [2021-07-09 18:02:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:59,593 INFO L225 Difference]: With dead ends: 1225 [2021-07-09 18:02:59,593 INFO L226 Difference]: Without dead ends: 1090 [2021-07-09 18:02:59,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-09 18:02:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 826. [2021-07-09 18:02:59,606 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) [2021-07-09 18:02:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1780 transitions. [2021-07-09 18:02:59,608 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1780 transitions. Word has length 95 [2021-07-09 18:02:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:59,608 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1780 transitions. [2021-07-09 18:02:59,608 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) [2021-07-09 18:02:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1780 transitions. [2021-07-09 18:02:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-09 18:02:59,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:59,609 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:59,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:59,828 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:59,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1532058885, now seen corresponding path program 59 times [2021-07-09 18:02:59,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:59,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623762670] [2021-07-09 18:02:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:00,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623762670] [2021-07-09 18:03:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623762670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001943029] [2021-07-09 18:03:00,662 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 [2021-07-09 18:03:00,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-07-09 18:03:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:03:00,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 400 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001943029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:02,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:02,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-07-09 18:03:02,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143418681] [2021-07-09 18:03:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-07-09 18:03:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-07-09 18:03:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=6655, Unknown=0, NotChecked=0, Total=8010 [2021-07-09 18:03:02,454 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) [2021-07-09 18:03:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:32,579 INFO L93 Difference]: Finished difference Result 8195 states and 16208 transitions. [2021-07-09 18:03:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 529 states. [2021-07-09 18:03:32,580 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 [2021-07-09 18:03:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:32,587 INFO L225 Difference]: With dead ends: 8195 [2021-07-09 18:03:32,587 INFO L226 Difference]: Without dead ends: 6599 [2021-07-09 18:03:32,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 613 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183332 ImplicationChecksByTransitivity, 24303.9ms TimeCoverageRelationStatistics Valid=106395, Invalid=271215, Unknown=0, NotChecked=0, Total=377610 [2021-07-09 18:03:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6599 states. [2021-07-09 18:03:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6599 to 489. [2021-07-09 18:03:32,624 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) [2021-07-09 18:03:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1008 transitions. [2021-07-09 18:03:32,625 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1008 transitions. Word has length 97 [2021-07-09 18:03:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:32,625 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1008 transitions. [2021-07-09 18:03:32,626 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) [2021-07-09 18:03:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1008 transitions. [2021-07-09 18:03:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-07-09 18:03:32,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:32,626 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:32,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:03:32,827 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 136633137, now seen corresponding path program 60 times [2021-07-09 18:03:32,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:32,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717792964] [2021-07-09 18:03:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:33,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717792964] [2021-07-09 18:03:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717792964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136754239] [2021-07-09 18:03:33,199 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 [2021-07-09 18:03:33,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-07-09 18:03:33,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:03:33,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 421 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136754239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:34,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:34,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45] total 68 [2021-07-09 18:03:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306938078] [2021-07-09 18:03:34,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-07-09 18:03:34,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:34,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-07-09 18:03:34,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=3799, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:03:34,757 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) [2021-07-09 18:03:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:56,810 INFO L93 Difference]: Finished difference Result 5622 states and 11218 transitions. [2021-07-09 18:03:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 530 states. [2021-07-09 18:03:56,810 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 [2021-07-09 18:03:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:56,815 INFO L225 Difference]: With dead ends: 5622 [2021-07-09 18:03:56,815 INFO L226 Difference]: Without dead ends: 5618 [2021-07-09 18:03:56,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 593 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178074 ImplicationChecksByTransitivity, 20301.2ms TimeCoverageRelationStatistics Valid=83624, Invalid=269806, Unknown=0, NotChecked=0, Total=353430 [2021-07-09 18:03:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5618 states. [2021-07-09 18:03:56,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5618 to 409. [2021-07-09 18:03:56,852 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) [2021-07-09 18:03:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 849 transitions. [2021-07-09 18:03:56,852 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 849 transitions. Word has length 97 [2021-07-09 18:03:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:56,853 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 849 transitions. [2021-07-09 18:03:56,853 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) [2021-07-09 18:03:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 849 transitions. [2021-07-09 18:03:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-07-09 18:03:56,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:56,854 INFO L508 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:57,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:57,069 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:57,069 INFO L82 PathProgramCache]: Analyzing trace with hash -57617479, now seen corresponding path program 61 times [2021-07-09 18:03:57,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:57,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399968341] [2021-07-09 18:03:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:57,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399968341] [2021-07-09 18:03:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399968341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103855952] [2021-07-09 18:03:57,495 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 [2021-07-09 18:03:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 87 conjunts are in the unsatisfiable core [2021-07-09 18:03:57,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:57,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103855952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:57,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:57,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-07-09 18:03:57,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063796964] [2021-07-09 18:03:57,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:03:57,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:03:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:57,712 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) [2021-07-09 18:03:58,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:58,293 INFO L93 Difference]: Finished difference Result 1284 states and 2533 transitions. [2021-07-09 18:03:58,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:03:58,293 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 [2021-07-09 18:03:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:58,294 INFO L225 Difference]: With dead ends: 1284 [2021-07-09 18:03:58,295 INFO L226 Difference]: Without dead ends: 1143 [2021-07-09 18:03:58,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:03:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-09 18:03:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 866. [2021-07-09 18:03:58,302 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) [2021-07-09 18:03:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1867 transitions. [2021-07-09 18:03:58,303 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1867 transitions. Word has length 99 [2021-07-09 18:03:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:58,303 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 1867 transitions. [2021-07-09 18:03:58,304 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) [2021-07-09 18:03:58,304 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1867 transitions. [2021-07-09 18:03:58,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-07-09 18:03:58,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:58,305 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:58,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:03:58,506 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:58,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1815225019, now seen corresponding path program 62 times [2021-07-09 18:03:58,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:58,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754677493] [2021-07-09 18:03:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:59,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:59,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754677493] [2021-07-09 18:03:59,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754677493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:59,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058696811] [2021-07-09 18:03:59,315 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 [2021-07-09 18:03:59,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:59,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:03:59,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 441 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:01,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058696811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:01,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:01,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 93 [2021-07-09 18:04:01,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842504504] [2021-07-09 18:04:01,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-07-09 18:04:01,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-07-09 18:04:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=7268, Unknown=0, NotChecked=0, Total=8742 [2021-07-09 18:04:01,078 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) [2021-07-09 18:04:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:38,935 INFO L93 Difference]: Finished difference Result 8896 states and 17602 transitions. [2021-07-09 18:04:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 576 states. [2021-07-09 18:04:38,936 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 [2021-07-09 18:04:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:38,943 INFO L225 Difference]: With dead ends: 8896 [2021-07-09 18:04:38,943 INFO L226 Difference]: Without dead ends: 7156 [2021-07-09 18:04:38,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218377 ImplicationChecksByTransitivity, 29346.8ms TimeCoverageRelationStatistics Valid=125365, Invalid=317525, Unknown=0, NotChecked=0, Total=442890 [2021-07-09 18:04:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7156 states. [2021-07-09 18:04:38,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7156 to 511. [2021-07-09 18:04:38,987 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) [2021-07-09 18:04:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1054 transitions. [2021-07-09 18:04:38,988 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1054 transitions. Word has length 101 [2021-07-09 18:04:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:38,988 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1054 transitions. [2021-07-09 18:04:38,988 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) [2021-07-09 18:04:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1054 transitions. [2021-07-09 18:04:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-07-09 18:04:38,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:38,989 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:39,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:39,190 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 195179061, now seen corresponding path program 63 times [2021-07-09 18:04:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:39,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993646911] [2021-07-09 18:04:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:39,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993646911] [2021-07-09 18:04:39,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993646911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076884711] [2021-07-09 18:04:39,685 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 [2021-07-09 18:04:39,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-07-09 18:04:39,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:04:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 463 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:41,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076884711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:41,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:41,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 47] total 71 [2021-07-09 18:04:41,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94851689] [2021-07-09 18:04:41,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-07-09 18:04:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-07-09 18:04:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=968, Invalid=4144, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 18:04:41,318 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) [2021-07-09 18:05:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:06,789 INFO L93 Difference]: Finished difference Result 6130 states and 12234 transitions. [2021-07-09 18:05:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 577 states. [2021-07-09 18:05:06,789 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 [2021-07-09 18:05:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:06,796 INFO L225 Difference]: With dead ends: 6130 [2021-07-09 18:05:06,796 INFO L226 Difference]: Without dead ends: 6126 [2021-07-09 18:05:06,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 643 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211754 ImplicationChecksByTransitivity, 23495.6ms TimeCoverageRelationStatistics Valid=98396, Invalid=316984, Unknown=0, NotChecked=0, Total=415380 [2021-07-09 18:05:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-07-09 18:05:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 427. [2021-07-09 18:05:06,837 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) [2021-07-09 18:05:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 887 transitions. [2021-07-09 18:05:06,837 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 887 transitions. Word has length 101 [2021-07-09 18:05:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:06,838 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 887 transitions. [2021-07-09 18:05:06,838 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) [2021-07-09 18:05:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 887 transitions. [2021-07-09 18:05:06,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-07-09 18:05:06,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:06,838 INFO L508 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:07,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:05:07,039 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash -248290439, now seen corresponding path program 64 times [2021-07-09 18:05:07,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:07,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128252008] [2021-07-09 18:05:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128252008] [2021-07-09 18:05:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128252008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137939976] [2021-07-09 18:05:07,415 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 [2021-07-09 18:05:07,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2021-07-09 18:05:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:07,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137939976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:07,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:07,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-07-09 18:05:07,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198813550] [2021-07-09 18:05:07,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:05:07,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:05:07,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:05:07,608 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) [2021-07-09 18:05:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:08,290 INFO L93 Difference]: Finished difference Result 1343 states and 2650 transitions. [2021-07-09 18:05:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:05:08,290 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 [2021-07-09 18:05:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:08,292 INFO L225 Difference]: With dead ends: 1343 [2021-07-09 18:05:08,292 INFO L226 Difference]: Without dead ends: 1196 [2021-07-09 18:05:08,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:05:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-09 18:05:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 906. [2021-07-09 18:05:08,299 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) [2021-07-09 18:05:08,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1954 transitions. [2021-07-09 18:05:08,300 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1954 transitions. Word has length 103 [2021-07-09 18:05:08,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:08,301 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 1954 transitions. [2021-07-09 18:05:08,301 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) [2021-07-09 18:05:08,301 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1954 transitions. [2021-07-09 18:05:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-09 18:05:08,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:08,302 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:08,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 18:05:08,502 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:08,503 INFO L82 PathProgramCache]: Analyzing trace with hash 28402043, now seen corresponding path program 65 times [2021-07-09 18:05:08,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:08,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493685290] [2021-07-09 18:05:08,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:09,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:09,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493685290] [2021-07-09 18:05:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493685290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:09,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872857703] [2021-07-09 18:05:09,440 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 [2021-07-09 18:05:09,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-07-09 18:05:09,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:09,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:09,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 484 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872857703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:11,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:11,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2021-07-09 18:05:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176087126] [2021-07-09 18:05:11,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-07-09 18:05:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:11,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-07-09 18:05:11,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=7908, Unknown=0, NotChecked=0, Total=9506 [2021-07-09 18:05:11,346 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) [2021-07-09 18:05:52,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:52,146 INFO L93 Difference]: Finished difference Result 9625 states and 19052 transitions. [2021-07-09 18:05:52,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 625 states. [2021-07-09 18:05:52,146 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 [2021-07-09 18:05:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:52,154 INFO L225 Difference]: With dead ends: 9625 [2021-07-09 18:05:52,154 INFO L226 Difference]: Without dead ends: 7735 [2021-07-09 18:05:52,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 717 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258241 ImplicationChecksByTransitivity, 30981.5ms TimeCoverageRelationStatistics Valid=146772, Invalid=369470, Unknown=0, NotChecked=0, Total=516242 [2021-07-09 18:05:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7735 states. [2021-07-09 18:05:52,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7735 to 533. [2021-07-09 18:05:52,202 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) [2021-07-09 18:05:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1100 transitions. [2021-07-09 18:05:52,203 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1100 transitions. Word has length 105 [2021-07-09 18:05:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:52,203 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1100 transitions. [2021-07-09 18:05:52,203 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) [2021-07-09 18:05:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1100 transitions. [2021-07-09 18:05:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-07-09 18:05:52,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:52,204 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:52,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:05:52,405 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -972912839, now seen corresponding path program 66 times [2021-07-09 18:05:52,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:52,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738412537] [2021-07-09 18:05:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:52,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738412537] [2021-07-09 18:05:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738412537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353906422] [2021-07-09 18:05:52,803 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 [2021-07-09 18:05:52,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-07-09 18:05:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:05:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 507 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353906422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:54,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:54,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 49] total 74 [2021-07-09 18:05:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706405246] [2021-07-09 18:05:54,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-07-09 18:05:54,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-07-09 18:05:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1046, Invalid=4504, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:05:54,641 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) [2021-07-09 18:06:23,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:23,146 INFO L93 Difference]: Finished difference Result 6660 states and 13294 transitions. [2021-07-09 18:06:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 626 states. [2021-07-09 18:06:23,146 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 [2021-07-09 18:06:23,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:23,154 INFO L225 Difference]: With dead ends: 6660 [2021-07-09 18:06:23,154 INFO L226 Difference]: Without dead ends: 6656 [2021-07-09 18:06:23,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250004 ImplicationChecksByTransitivity, 26076.6ms TimeCoverageRelationStatistics Valid=115046, Invalid=370066, Unknown=0, NotChecked=0, Total=485112 [2021-07-09 18:06:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6656 states. [2021-07-09 18:06:23,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6656 to 445. [2021-07-09 18:06:23,193 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) [2021-07-09 18:06:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 925 transitions. [2021-07-09 18:06:23,194 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 925 transitions. Word has length 105 [2021-07-09 18:06:23,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:23,194 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 925 transitions. [2021-07-09 18:06:23,194 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) [2021-07-09 18:06:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 925 transitions. [2021-07-09 18:06:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-07-09 18:06:23,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:23,195 INFO L508 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:23,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:23,396 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:23,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:23,396 INFO L82 PathProgramCache]: Analyzing trace with hash 601748025, now seen corresponding path program 67 times [2021-07-09 18:06:23,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:23,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691780052] [2021-07-09 18:06:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:23,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:23,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691780052] [2021-07-09 18:06:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691780052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249053101] [2021-07-09 18:06:23,784 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 [2021-07-09 18:06:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 95 conjunts are in the unsatisfiable core [2021-07-09 18:06:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249053101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:23,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-07-09 18:06:23,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956651384] [2021-07-09 18:06:23,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:06:23,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:23,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:06:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:23,980 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) [2021-07-09 18:06:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:24,690 INFO L93 Difference]: Finished difference Result 1402 states and 2767 transitions. [2021-07-09 18:06:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:06:24,690 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 [2021-07-09 18:06:24,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:24,692 INFO L225 Difference]: With dead ends: 1402 [2021-07-09 18:06:24,692 INFO L226 Difference]: Without dead ends: 1249 [2021-07-09 18:06:24,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-07-09 18:06:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 946. [2021-07-09 18:06:24,700 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) [2021-07-09 18:06:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2041 transitions. [2021-07-09 18:06:24,701 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2041 transitions. Word has length 107 [2021-07-09 18:06:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:24,701 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2041 transitions. [2021-07-09 18:06:24,702 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) [2021-07-09 18:06:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2041 transitions. [2021-07-09 18:06:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-09 18:06:24,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:24,703 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:24,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:06:24,903 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1454825669, now seen corresponding path program 68 times [2021-07-09 18:06:24,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:24,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444235408] [2021-07-09 18:06:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:25,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444235408] [2021-07-09 18:06:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444235408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359450957] [2021-07-09 18:06:25,854 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 [2021-07-09 18:06:25,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:25,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:25,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:06:25,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 529 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359450957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 101 [2021-07-09 18:06:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716282612] [2021-07-09 18:06:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-07-09 18:06:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-07-09 18:06:27,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1727, Invalid=8575, Unknown=0, NotChecked=0, Total=10302 [2021-07-09 18:06:27,890 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) [2021-07-09 18:07:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:14,237 INFO L93 Difference]: Finished difference Result 10382 states and 20558 transitions. [2021-07-09 18:07:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 676 states. [2021-07-09 18:07:14,238 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 [2021-07-09 18:07:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:14,248 INFO L225 Difference]: With dead ends: 10382 [2021-07-09 18:07:14,248 INFO L226 Difference]: Without dead ends: 8336 [2021-07-09 18:07:14,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303348 ImplicationChecksByTransitivity, 34537.2ms TimeCoverageRelationStatistics Valid=170817, Invalid=427485, Unknown=0, NotChecked=0, Total=598302 [2021-07-09 18:07:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8336 states. [2021-07-09 18:07:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8336 to 555. [2021-07-09 18:07:14,307 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) [2021-07-09 18:07:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1146 transitions. [2021-07-09 18:07:14,307 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1146 transitions. Word has length 109 [2021-07-09 18:07:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:14,307 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1146 transitions. [2021-07-09 18:07:14,308 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) [2021-07-09 18:07:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1146 transitions. [2021-07-09 18:07:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-07-09 18:07:14,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:14,308 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:14,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:14,513 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -561063363, now seen corresponding path program 69 times [2021-07-09 18:07:14,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:14,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066689939] [2021-07-09 18:07:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:14,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:14,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066689939] [2021-07-09 18:07:14,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066689939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200997502] [2021-07-09 18:07:14,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-07-09 18:07:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:07:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 553 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200997502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:16,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:16,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 51] total 77 [2021-07-09 18:07:16,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373952333] [2021-07-09 18:07:16,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-07-09 18:07:16,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-07-09 18:07:16,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1127, Invalid=4879, Unknown=0, NotChecked=0, Total=6006 [2021-07-09 18:07:16,875 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) [2021-07-09 18:07:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:49,340 INFO L93 Difference]: Finished difference Result 7212 states and 14398 transitions. [2021-07-09 18:07:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 677 states. [2021-07-09 18:07:49,340 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 [2021-07-09 18:07:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:49,348 INFO L225 Difference]: With dead ends: 7212 [2021-07-09 18:07:49,348 INFO L226 Difference]: Without dead ends: 7208 [2021-07-09 18:07:49,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293220 ImplicationChecksByTransitivity, 29142.1ms TimeCoverageRelationStatistics Valid=133727, Invalid=429523, Unknown=0, NotChecked=0, Total=563250 [2021-07-09 18:07:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-07-09 18:07:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 463. [2021-07-09 18:07:49,392 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) [2021-07-09 18:07:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 963 transitions. [2021-07-09 18:07:49,392 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 963 transitions. Word has length 109 [2021-07-09 18:07:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:49,392 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 963 transitions. [2021-07-09 18:07:49,392 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) [2021-07-09 18:07:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 963 transitions. [2021-07-09 18:07:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-07-09 18:07:49,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:49,393 INFO L508 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:49,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-07-09 18:07:49,594 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1149059065, now seen corresponding path program 70 times [2021-07-09 18:07:49,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:49,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14794380] [2021-07-09 18:07:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:50,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14794380] [2021-07-09 18:07:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14794380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:50,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655487922] [2021-07-09 18:07:50,021 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 [2021-07-09 18:07:50,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 99 conjunts are in the unsatisfiable core [2021-07-09 18:07:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655487922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:50,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:50,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-07-09 18:07:50,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157727235] [2021-07-09 18:07:50,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:07:50,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:07:50,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:07:50,288 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) [2021-07-09 18:07:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:51,077 INFO L93 Difference]: Finished difference Result 1461 states and 2884 transitions. [2021-07-09 18:07:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:07:51,077 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 [2021-07-09 18:07:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:51,079 INFO L225 Difference]: With dead ends: 1461 [2021-07-09 18:07:51,079 INFO L226 Difference]: Without dead ends: 1302 [2021-07-09 18:07:51,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 370.6ms TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:07:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-07-09 18:07:51,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 986. [2021-07-09 18:07:51,088 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) [2021-07-09 18:07:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2128 transitions. [2021-07-09 18:07:51,089 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2128 transitions. Word has length 111 [2021-07-09 18:07:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:51,089 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 2128 transitions. [2021-07-09 18:07:51,089 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) [2021-07-09 18:07:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2128 transitions. [2021-07-09 18:07:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-07-09 18:07:51,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:51,090 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:51,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:51,291 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:51,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:51,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1767498757, now seen corresponding path program 71 times [2021-07-09 18:07:51,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:51,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065081926] [2021-07-09 18:07:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:52,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065081926] [2021-07-09 18:07:52,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065081926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:52,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446342961] [2021-07-09 18:07:52,316 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 [2021-07-09 18:07:52,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-07-09 18:07:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:07:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 576 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:54,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446342961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:54,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:54,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 105 [2021-07-09 18:07:54,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15809611] [2021-07-09 18:07:54,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-07-09 18:07:54,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-07-09 18:07:54,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1861, Invalid=9269, Unknown=0, NotChecked=0, Total=11130 [2021-07-09 18:07:54,547 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) [2021-07-09 18:08:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:48,510 INFO L93 Difference]: Finished difference Result 11167 states and 22120 transitions. [2021-07-09 18:08:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 729 states. [2021-07-09 18:08:48,510 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 [2021-07-09 18:08:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:48,521 INFO L225 Difference]: With dead ends: 11167 [2021-07-09 18:08:48,521 INFO L226 Difference]: Without dead ends: 8959 [2021-07-09 18:08:48,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 829 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354141 ImplicationChecksByTransitivity, 38916.0ms TimeCoverageRelationStatistics Valid=197709, Invalid=492021, Unknown=0, NotChecked=0, Total=689730 [2021-07-09 18:08:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-07-09 18:08:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 577. [2021-07-09 18:08:48,581 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) [2021-07-09 18:08:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1192 transitions. [2021-07-09 18:08:48,582 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1192 transitions. Word has length 113 [2021-07-09 18:08:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:48,582 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1192 transitions. [2021-07-09 18:08:48,582 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) [2021-07-09 18:08:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1192 transitions. [2021-07-09 18:08:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-07-09 18:08:48,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:48,583 INFO L508 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:48,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:48,784 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash -770692287, now seen corresponding path program 72 times [2021-07-09 18:08:48,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:48,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996646206] [2021-07-09 18:08:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:49,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996646206] [2021-07-09 18:08:49,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996646206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69365743] [2021-07-09 18:08:49,218 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 [2021-07-09 18:08:49,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-07-09 18:08:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-09 18:08:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 601 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:51,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69365743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:51,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:51,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53] total 80 [2021-07-09 18:08:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586825783] [2021-07-09 18:08:51,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-07-09 18:08:51,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-07-09 18:08:51,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1211, Invalid=5269, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 18:08:51,278 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) [2021-07-09 18:09:06,410 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 Received shutdown request... [2021-07-09 18:09:18,194 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-07-09 18:09:18,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 593 states. [2021-07-09 18:09:18,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:18,395 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:09:18,397 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:09:18,398 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:09:18,399 INFO L202 PluginConnector]: Adding new model figure3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:09:18 BasicIcfg [2021-07-09 18:09:18,399 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:09:18,399 INFO L168 Benchmark]: Toolchain (without parser) took 729141.77 ms. Allocated memory was 213.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 193.8 MB in the beginning and 953.0 MB in the end (delta: -759.2 MB). Peak memory consumption was 624.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:18,399 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 213.9 MB. Free memory is still 194.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:09:18,399 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 213.9 MB. Free memory was 193.7 MB in the beginning and 192.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:18,399 INFO L168 Benchmark]: Boogie Preprocessor took 17.16 ms. Allocated memory is still 213.9 MB. Free memory was 192.3 MB in the beginning and 191.4 MB in the end (delta: 951.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:18,399 INFO L168 Benchmark]: RCFGBuilder took 299.13 ms. Allocated memory is still 213.9 MB. Free memory was 191.4 MB in the beginning and 179.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:18,399 INFO L168 Benchmark]: TraceAbstraction took 728793.14 ms. Allocated memory was 213.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 179.2 MB in the beginning and 953.0 MB in the end (delta: -773.8 MB). Peak memory consumption was 609.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:09:18,400 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 0.11 ms. Allocated memory is still 213.9 MB. Free memory is still 194.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 26.80 ms. Allocated memory is still 213.9 MB. Free memory was 193.7 MB in the beginning and 192.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.16 ms. Allocated memory is still 213.9 MB. Free memory was 192.3 MB in the beginning and 191.4 MB in the end (delta: 951.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.13 ms. Allocated memory is still 213.9 MB. Free memory was 191.4 MB in the beginning and 179.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 728793.14 ms. Allocated memory was 213.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 179.2 MB in the beginning and 953.0 MB in the end (delta: -773.8 MB). Peak memory consumption was 609.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (577states) and FLOYD_HOARE automaton (currently 593 states, 81 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 14 for 10ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 728721.4ms, OverallIterations: 75, TraceHistogramMax: 25, EmptinessCheckTime: 67.8ms, AutomataDifference: 639665.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 37.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6552 SDtfs, 40654 SDslu, 104863 SDs, 0 SdLazy, 113596 SolverSat, 6694 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 57334.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20406 GetRequests, 4025 SyntacticMatches, 48 SemanticMatches, 16332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3940692 ImplicationChecksByTransitivity, 540106.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=986occurred in iteration=73, InterpolantAutomatonStates: 13516, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1037.6ms AutomataMinimizationTime, 74 MinimizatonAttempts, 142807 StatesRemovedByMinimization, 74 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 491.5ms SsaConstructionTime, 2183.5ms SatisfiabilityAnalysisTime, 67748.6ms InterpolantComputationTime, 9618 NumberOfCodeBlocks, 9618 NumberOfCodeBlocksAsserted, 699 NumberOfCheckSat, 9470 ConstructedInterpolants, 0 QuantifiedInterpolants, 78220 SizeOfPredicates, 220 NumberOfNonLiveVariables, 12262 ConjunctsInSsa, 2717 ConjunctsInUnsatCore, 148 InterpolantComputations, 2 PerfectInterpolantSequences, 20249/61299 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